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Re: [PATCH v5 1/3] docs: add doxygen support for html documentation


  • To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
  • From: Luca Fancellu <luca.fancellu@xxxxxxx>
  • Date: Wed, 5 May 2021 11:51:22 +0100
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> On 4 May 2021, at 23:55, Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:
> 
> On Tue, 4 May 2021, Luca Fancellu wrote:
>> Add doxygen support to build html documentation with sphinx,
>> to do that the following modification are applied:
>> 
>> 1) Modify docs/configure.ac and consequently configure script
>>   to check, through the ./configure script, the presence in
>>   the system of the sphinx-build binary, if it is found then
>>   it checks also the presence of the doxygen binary, breathe
>>   and sphinx-rtd-theme python packages.
>>   Doxygen and the packages are required only if sphinx-build
>>   is found, otherwise the Makefile will simply skip the
>>   sphinx html generation.
>>   The ax_python_module.m4 support is needed to check for
>>   python packages.
>> 2) Add doxygen templates and configuration file
>> 3) Modify docs/Makefile to call in sequence doxygen and
>>   sphinx-build, the doxygen configuration file will be
>>   modified to include the xen absolute path and
>>   a list of header to parse.
>>   A doxygen_input.h file is generated to include every
>>   header listed in the doxy_input.list file.
>> 4) Add preprocessor called by doxygen before parsing headers,
>>   it will include in every header a doxygen_include.h file
>>   that provides missing defines and includes that are
>>   usually passed by the compiler.
> 
> This is clearly is a gargantuan work! Thank you so much!
> 
> Is there a way we can split this patch somehow? Given the nature of the
> work, obvious we can't do a line-by-line review of everything, but I
> think it would be good to split it so that we can more easily ack parts
> of it and review others.
> 
> For instance something like the following:
> 
> - one patch for docs/xen.doxyfile.in for which you can already add my
>  acked-by judging by the output[1]
> - one patch to add the png image, also add my acked-by
> - one patch for mainpage.md, header.html, footer.html, and
>  customdoxygen.css, I think they can all be on a single patch and have
>  my acked-by
> - one patch to add the new m4 macros under m4/
> - one patch with changes to docs/configure.ac, docs/configure,
>  config/Docs.mk.in
> - one patch with doxy-preprocessor.py, doxy_input.list,
>  doxygen_include.h.in
> - one patch with changes to docs/Makefile and docs/conf.py
> 
> Does this sound reasonable to you?

Hi Stefano,

Yes I’ll split the patch and I’ll push everything in the v6.

Cheers,
Luca

> 
> 
> [1] 
> https://luca.fancellu.gitlab.io/xen-docs/hypercall-interfaces/arm64/grant_tables.html
> 
> 
>> Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
>> ---
>> v4 changes:
>> - create alias @keepindent/@endkeepindent for the doxygen
>>  command @code/@endcode
>> v3 changes:
>> - add preprocessor to handle missing defines and anonymous
>>  structs/unions before doxygen parsing
>> - modification to Makefile to handle the new process
>> v2 changes:
>> - Fix bug in Makefile when sphinx is not found in the system
>> ---
>> .gitignore                                   |    6 +
>> config/Docs.mk.in                            |    2 +
>> docs/Makefile                                |   42 +-
>> docs/conf.py                                 |   48 +-
>> docs/configure                               |  258 ++
>> docs/configure.ac                            |   15 +
>> docs/xen-doxygen/customdoxygen.css           |   36 +
>> docs/xen-doxygen/doxy-preprocessor.py        |  110 +
>> docs/xen-doxygen/doxy_input.list             |    0
>> docs/xen-doxygen/doxygen_include.h.in        |   32 +
>> docs/xen-doxygen/footer.html                 |   21 +
>> docs/xen-doxygen/header.html                 |   56 +
>> docs/xen-doxygen/mainpage.md                 |    5 +
>> docs/xen-doxygen/xen_project_logo_165x67.png |  Bin 0 -> 18223 bytes
>> docs/xen.doxyfile.in                         | 2316 ++++++++++++++++++
>> m4/ax_python_module.m4                       |   56 +
>> m4/docs_tool.m4                              |    9 +
>> 17 files changed, 3006 insertions(+), 6 deletions(-)
>> create mode 100644 docs/xen-doxygen/customdoxygen.css
>> create mode 100755 docs/xen-doxygen/doxy-preprocessor.py
>> create mode 100644 docs/xen-doxygen/doxy_input.list
>> create mode 100644 docs/xen-doxygen/doxygen_include.h.in
>> create mode 100644 docs/xen-doxygen/footer.html
>> create mode 100644 docs/xen-doxygen/header.html
>> create mode 100644 docs/xen-doxygen/mainpage.md
>> create mode 100644 docs/xen-doxygen/xen_project_logo_165x67.png
>> create mode 100644 docs/xen.doxyfile.in
>> create mode 100644 m4/ax_python_module.m4
>> 
>> diff --git a/.gitignore b/.gitignore
>> index 1c2fa1530b..d271e0ce6a 100644
>> --- a/.gitignore
>> +++ b/.gitignore
>> @@ -58,6 +58,12 @@ docs/man7/
>> docs/man8/
>> docs/pdf/
>> docs/txt/
>> +docs/doxygen-output
>> +docs/sphinx
>> +docs/xen.doxyfile
>> +docs/xen.doxyfile.tmp
>> +docs/xen-doxygen/doxygen_include.h
>> +docs/xen-doxygen/doxygen_include.h.tmp
>> extras/mini-os*
>> install/*
>> stubdom/*-minios-config.mk
>> diff --git a/config/Docs.mk.in b/config/Docs.mk.in
>> index e76e5cd5ff..dfd4a02838 100644
>> --- a/config/Docs.mk.in
>> +++ b/config/Docs.mk.in
>> @@ -7,3 +7,5 @@ POD2HTML            := @POD2HTML@
>> POD2TEXT            := @POD2TEXT@
>> PANDOC              := @PANDOC@
>> PERL                := @PERL@
>> +SPHINXBUILD         := @SPHINXBUILD@
>> +DOXYGEN             := @DOXYGEN@
>> diff --git a/docs/Makefile b/docs/Makefile
>> index 8de1efb6f5..2f784c36ce 100644
>> --- a/docs/Makefile
>> +++ b/docs/Makefile
>> @@ -17,6 +17,18 @@ TXTSRC-y := $(sort $(shell find misc -name '*.txt' 
>> -print))
>> 
>> PANDOCSRC-y := $(sort $(shell find designs/ features/ misc/ process/ specs/ 
>> \( -name '*.pandoc' -o -name '*.md' \) -print))
>> 
>> +# Directory in which the doxygen documentation is created
>> +# This must be kept in sync with breathe_projects value in conf.py
>> +DOXYGEN_OUTPUT = doxygen-output
>> +
>> +# Doxygen input headers from xen-doxygen/doxy_input.list file
>> +DOXY_LIST_SOURCES != cat "xen-doxygen/doxy_input.list"
>> +DOXY_LIST_SOURCES := $(realpath $(addprefix 
>> $(XEN_ROOT)/,$(DOXY_LIST_SOURCES)))
>> +
>> +DOXY_DEPS := xen.doxyfile \
>> +                     xen-doxygen/mainpage.md \
>> +                     xen-doxygen/doxygen_include.h
>> +
>> # Documentation targets
>> $(foreach i,$(MAN_SECTIONS), \
>>   $(eval DOC_MAN$(i) := $(patsubst man/%.$(i),man$(i)/%.$(i), \
>> @@ -46,8 +58,28 @@ all: build
>> build: html txt pdf man-pages figs
>> 
>> .PHONY: sphinx-html
>> -sphinx-html:
>> -    sphinx-build -b html . sphinx/html
>> +sphinx-html: $(DOXY_DEPS) $(DOXY_LIST_SOURCES)
>> +ifneq ($(SPHINXBUILD),no)
>> +    $(DOXYGEN) xen.doxyfile
>> +    XEN_ROOT=$(realpath $(XEN_ROOT)) $(SPHINXBUILD) -b html . sphinx/html
>> +else
>> +    @echo "Sphinx is not installed; skipping sphinx-html documentation."
>> +endif
>> +
>> +xen.doxyfile: xen.doxyfile.in xen-doxygen/doxy_input.list
>> +    @echo "Generating $@"
>> +    @sed -e "s,@XEN_BASE@,$(realpath $(XEN_ROOT)),g" $< \
>> +            | sed -e "s,@DOXY_OUT@,$(DOXYGEN_OUTPUT),g" > $@.tmp
>> +    @$(foreach inc,\
>> +            $(DOXY_LIST_SOURCES),\
>> +            echo "INPUT += \"$(inc)\"" >> $@.tmp; \
>> +    )
>> +    mv $@.tmp $@
>> +
>> +xen-doxygen/doxygen_include.h: xen-doxygen/doxygen_include.h.in
>> +    @echo "Generating $@"
>> +    @sed -e "s,@XEN_BASE@,$(realpath $(XEN_ROOT)),g" $< > $@.tmp
>> +    @mv $@.tmp $@
>> 
>> .PHONY: html
>> html: $(DOC_HTML) html/index.html
>> @@ -71,7 +103,11 @@ clean: clean-man-pages
>>      $(MAKE) -C figs clean
>>      rm -rf .word_count *.aux *.dvi *.bbl *.blg *.glo *.idx *~
>>      rm -rf *.ilg *.log *.ind *.toc *.bak *.tmp core
>> -    rm -rf html txt pdf sphinx/html
>> +    rm -rf html txt pdf sphinx $(DOXYGEN_OUTPUT)
>> +    rm -f xen.doxyfile
>> +    rm -f xen.doxyfile.tmp
>> +    rm -f xen-doxygen/doxygen_include.h
>> +    rm -f xen-doxygen/doxygen_include.h.tmp
>> 
>> .PHONY: distclean
>> distclean: clean
>> diff --git a/docs/conf.py b/docs/conf.py
>> index 50e41501db..a48de42331 100644
>> --- a/docs/conf.py
>> +++ b/docs/conf.py
>> @@ -13,13 +13,17 @@
>> # add these directories to sys.path here. If the directory is relative to the
>> # documentation root, use os.path.abspath to make it absolute, like shown 
>> here.
>> #
>> -# import os
>> -# import sys
>> +import os
>> +import sys
>> # sys.path.insert(0, os.path.abspath('.'))
>> 
>> 
>> # -- Project information 
>> -----------------------------------------------------
>> 
>> +if "XEN_ROOT" not in os.environ:
>> +    sys.exit("$XEN_ROOT environment variable undefined.")
>> +XEN_ROOT = os.path.abspath(os.environ["XEN_ROOT"])
>> +
>> project = u'Xen'
>> copyright = u'2019, The Xen development community'
>> author = u'The Xen development community'
>> @@ -35,6 +39,7 @@ try:
>>             xen_subver = line.split(u"=")[1].strip()
>>         elif line.startswith(u"export XEN_EXTRAVERSION"):
>>             xen_extra = line.split(u"=")[1].split(u"$", 1)[0].strip()
>> +
>> except:
>>     pass
>> finally:
>> @@ -44,6 +49,15 @@ finally:
>>     else:
>>         version = release = u"unknown version"
>> 
>> +try:
>> +    xen_doxygen_output = None
>> +
>> +    for line in open(u"Makefile"):
>> +        if line.startswith(u"DOXYGEN_OUTPUT"):
>> +                xen_doxygen_output = line.split(u"=")[1].strip()
>> +except:
>> +    sys.exit("DOXYGEN_OUTPUT variable undefined.")
>> +
>> # -- General configuration 
>> ---------------------------------------------------
>> 
>> # If your documentation needs a minimal Sphinx version, state it here.
>> @@ -53,7 +67,8 @@ needs_sphinx = '1.4'
>> # Add any Sphinx extension module names here, as strings. They can be
>> # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
>> # ones.
>> -extensions = []
>> +# breathe -> extension that integrates doxygen xml output with sphinx
>> +extensions = ['breathe']
>> 
>> # Add any paths that contain templates here, relative to this directory.
>> templates_path = ['_templates']
>> @@ -175,6 +190,33 @@ texinfo_documents = [
>>      'Miscellaneous'),
>> ]
>> 
>> +# -- Options for Breathe extension 
>> -------------------------------------------
>> +
>> +breathe_projects = {
>> +    "Xen": "{}/docs/{}/xml".format(XEN_ROOT, xen_doxygen_output)
>> +}
>> +breathe_default_project = "Xen"
>> +
>> +breathe_domain_by_extension = {
>> +    "h": "c",
>> +    "c": "c",
>> +}
>> +breathe_separate_member_pages = True
>> +breathe_show_enumvalue_initializer = True
>> +breathe_show_define_initializer = True
>> +
>> +# Qualifiers to a function are causing Sphihx/Breathe to warn about
>> +# Error when parsing function declaration and more.  This is a list
>> +# of strings that the parser additionally should accept as
>> +# attributes.
>> +cpp_id_attributes = [
>> +    '__syscall', '__deprecated', '__may_alias',
>> +    '__used', '__unused', '__weak',
>> +    '__DEPRECATED_MACRO', 'FUNC_NORETURN',
>> +    '__subsystem',
>> +]
>> +c_id_attributes = cpp_id_attributes
>> +
>> 
>> # -- Options for Epub output 
>> -------------------------------------------------
>> 
>> diff --git a/docs/configure b/docs/configure
>> index 569bd4c2ff..0ebf046a79 100755
>> --- a/docs/configure
>> +++ b/docs/configure
>> @@ -588,6 +588,8 @@ ac_unique_file="misc/xen-command-line.pandoc"
>> ac_subst_vars='LTLIBOBJS
>> LIBOBJS
>> PERL
>> +DOXYGEN
>> +SPHINXBUILD
>> PANDOC
>> POD2TEXT
>> POD2HTML
>> @@ -673,6 +675,7 @@ POD2MAN
>> POD2HTML
>> POD2TEXT
>> PANDOC
>> +DOXYGEN
>> PERL'
>> 
>> 
>> @@ -1318,6 +1321,7 @@ Some influential environment variables:
>>   POD2HTML    Path to pod2html tool
>>   POD2TEXT    Path to pod2text tool
>>   PANDOC      Path to pandoc tool
>> +  DOXYGEN     Path to doxygen tool
>>   PERL        Path to Perl parser
>> 
>> Use these variables to override the choices made by `configure' or to help
>> @@ -1800,6 +1804,7 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please 
>> don't use this var.
>> 
>> 
>> 
>> +
>> case "$host_os" in
>> *freebsd*) XENSTORED_KVA=/dev/xen/xenstored ;;
>> *) XENSTORED_KVA=/proc/xen/xsd_kva ;;
>> @@ -1812,6 +1817,53 @@ case "$host_os" in
>> esac
>> 
>> 
>> +# 
>> ===========================================================================
>> +#     https://www.gnu.org/software/autoconf-archive/ax_python_module.html
>> +# 
>> ===========================================================================
>> +#
>> +# SYNOPSIS
>> +#
>> +#   AX_PYTHON_MODULE(modname[, fatal, python])
>> +#
>> +# DESCRIPTION
>> +#
>> +#   Checks for Python module.
>> +#
>> +#   If fatal is non-empty then absence of a module will trigger an error.
>> +#   The third parameter can either be "python" for Python 2 or "python3" for
>> +#   Python 3; defaults to Python 3.
>> +#
>> +# LICENSE
>> +#
>> +#   Copyright (c) 2008 Andrew Collier
>> +#
>> +#   Copying and distribution of this file, with or without modification, are
>> +#   permitted in any medium without royalty provided the copyright notice
>> +#   and this notice are preserved. This file is offered as-is, without any
>> +#   warranty.
>> +
>> +#serial 9
>> +
>> +# This is what autoupdate's m4 run will expand.  It fires
>> +# the warning (with _au_warn_XXX), outputs it into the
>> +# updated configure.ac (with AC_DIAGNOSE), and then outputs
>> +# the replacement expansion.
>> +
>> +
>> +# This is an auxiliary macro that is also run when
>> +# autoupdate runs m4.  It simply calls m4_warning, but
>> +# we need a wrapper so that each warning is emitted only
>> +# once.  We break the quoting in m4_warning's argument in
>> +# order to expand this macro's arguments, not AU_DEFUN's.
>> +
>> +
>> +# Finally, this is the expansion that is picked up by
>> +# autoconf.  It tells the user to run autoupdate, and
>> +# then outputs the replacement expansion.  We do not care
>> +# about autoupdate's warning because that contains
>> +# information on what to do *after* running autoupdate.
>> +
>> +
>> 
>> 
>> test "x$prefix" = "xNONE" && prefix=$ac_default_prefix
>> @@ -2232,6 +2284,212 @@ $as_echo "$as_me: WARNING: pandoc is not available 
>> so some documentation won't b
>> fi
>> 
>> 
>> +# If sphinx is installed, make sure to have also the dependencies to build
>> +# Sphinx documentation.
>> +for ac_prog in sphinx-build
>> +do
>> +  # Extract the first word of "$ac_prog", so it can be a program name with 
>> args.
>> +set dummy $ac_prog; ac_word=$2
>> +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
>> +$as_echo_n "checking for $ac_word... " >&6; }
>> +if ${ac_cv_prog_SPHINXBUILD+:} false; then :
>> +  $as_echo_n "(cached) " >&6
>> +else
>> +  if test -n "$SPHINXBUILD"; then
>> +  ac_cv_prog_SPHINXBUILD="$SPHINXBUILD" # Let the user override the test.
>> +else
>> +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
>> +for as_dir in $PATH
>> +do
>> +  IFS=$as_save_IFS
>> +  test -z "$as_dir" && as_dir=.
>> +    for ac_exec_ext in '' $ac_executable_extensions; do
>> +  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
>> +    ac_cv_prog_SPHINXBUILD="$ac_prog"
>> +    $as_echo "$as_me:${as_lineno-$LINENO}: found 
>> $as_dir/$ac_word$ac_exec_ext" >&5
>> +    break 2
>> +  fi
>> +done
>> +  done
>> +IFS=$as_save_IFS
>> +
>> +fi
>> +fi
>> +SPHINXBUILD=$ac_cv_prog_SPHINXBUILD
>> +if test -n "$SPHINXBUILD"; then
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SPHINXBUILD" >&5
>> +$as_echo "$SPHINXBUILD" >&6; }
>> +else
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
>> +$as_echo "no" >&6; }
>> +fi
>> +
>> +
>> +  test -n "$SPHINXBUILD" && break
>> +done
>> +test -n "$SPHINXBUILD" || SPHINXBUILD="no"
>> +
>> +    if test "x$SPHINXBUILD" = xno; then :
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: sphinx-build is not 
>> available so sphinx documentation \
>> +won't be built" >&5
>> +$as_echo "$as_me: WARNING: sphinx-build is not available so sphinx 
>> documentation \
>> +won't be built" >&2;}
>> +else
>> +
>> +            # Extract the first word of "sphinx-build", so it can be a 
>> program name with args.
>> +set dummy sphinx-build; ac_word=$2
>> +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
>> +$as_echo_n "checking for $ac_word... " >&6; }
>> +if ${ac_cv_path_SPHINXBUILD+:} false; then :
>> +  $as_echo_n "(cached) " >&6
>> +else
>> +  case $SPHINXBUILD in
>> +  [\\/]* | ?:[\\/]*)
>> +  ac_cv_path_SPHINXBUILD="$SPHINXBUILD" # Let the user override the test 
>> with a path.
>> +  ;;
>> +  *)
>> +  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
>> +for as_dir in $PATH
>> +do
>> +  IFS=$as_save_IFS
>> +  test -z "$as_dir" && as_dir=.
>> +    for ac_exec_ext in '' $ac_executable_extensions; do
>> +  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
>> +    ac_cv_path_SPHINXBUILD="$as_dir/$ac_word$ac_exec_ext"
>> +    $as_echo "$as_me:${as_lineno-$LINENO}: found 
>> $as_dir/$ac_word$ac_exec_ext" >&5
>> +    break 2
>> +  fi
>> +done
>> +  done
>> +IFS=$as_save_IFS
>> +
>> +  ;;
>> +esac
>> +fi
>> +SPHINXBUILD=$ac_cv_path_SPHINXBUILD
>> +if test -n "$SPHINXBUILD"; then
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SPHINXBUILD" >&5
>> +$as_echo "$SPHINXBUILD" >&6; }
>> +else
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
>> +$as_echo "no" >&6; }
>> +fi
>> +
>> +
>> +
>> +
>> +    # Extract the first word of "doxygen", so it can be a program name with 
>> args.
>> +set dummy doxygen; ac_word=$2
>> +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
>> +$as_echo_n "checking for $ac_word... " >&6; }
>> +if ${ac_cv_path_DOXYGEN+:} false; then :
>> +  $as_echo_n "(cached) " >&6
>> +else
>> +  case $DOXYGEN in
>> +  [\\/]* | ?:[\\/]*)
>> +  ac_cv_path_DOXYGEN="$DOXYGEN" # Let the user override the test with a 
>> path.
>> +  ;;
>> +  *)
>> +  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
>> +for as_dir in $PATH
>> +do
>> +  IFS=$as_save_IFS
>> +  test -z "$as_dir" && as_dir=.
>> +    for ac_exec_ext in '' $ac_executable_extensions; do
>> +  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
>> +    ac_cv_path_DOXYGEN="$as_dir/$ac_word$ac_exec_ext"
>> +    $as_echo "$as_me:${as_lineno-$LINENO}: found 
>> $as_dir/$ac_word$ac_exec_ext" >&5
>> +    break 2
>> +  fi
>> +done
>> +  done
>> +IFS=$as_save_IFS
>> +
>> +  ;;
>> +esac
>> +fi
>> +DOXYGEN=$ac_cv_path_DOXYGEN
>> +if test -n "$DOXYGEN"; then
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DOXYGEN" >&5
>> +$as_echo "$DOXYGEN" >&6; }
>> +else
>> +  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
>> +$as_echo "no" >&6; }
>> +fi
>> +
>> +
>> +    if ! test -x "$ac_cv_path_DOXYGEN"; then :
>> +
>> +        as_fn_error $? "doxygen is needed" "$LINENO" 5
>> +
>> +fi
>> +
>> +
>> +    if test -z $PYTHON;
>> +    then
>> +        if test -z "";
>> +        then
>> +            PYTHON="python3"
>> +        else
>> +            PYTHON=""
>> +        fi
>> +    fi
>> +    PYTHON_NAME=`basename $PYTHON`
>> +    { $as_echo "$as_me:${as_lineno-$LINENO}: checking $PYTHON_NAME module: 
>> breathe" >&5
>> +$as_echo_n "checking $PYTHON_NAME module: breathe... " >&6; }
>> +    $PYTHON -c "import breathe" 2>/dev/null
>> +    if test $? -eq 0;
>> +    then
>> +        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
>> +$as_echo "yes" >&6; }
>> +        eval HAVE_PYMOD_BREATHE=yes
>> +    else
>> +        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
>> +$as_echo "no" >&6; }
>> +        eval HAVE_PYMOD_BREATHE=no
>> +        #
>> +        if test -n "yes"
>> +        then
>> +            as_fn_error $? "failed to find required module breathe" 
>> "$LINENO" 5
>> +            exit 1
>> +        fi
>> +    fi
>> +
>> +
>> +    if test -z $PYTHON;
>> +    then
>> +        if test -z "";
>> +        then
>> +            PYTHON="python3"
>> +        else
>> +            PYTHON=""
>> +        fi
>> +    fi
>> +    PYTHON_NAME=`basename $PYTHON`
>> +    { $as_echo "$as_me:${as_lineno-$LINENO}: checking $PYTHON_NAME module: 
>> sphinx_rtd_theme" >&5
>> +$as_echo_n "checking $PYTHON_NAME module: sphinx_rtd_theme... " >&6; }
>> +    $PYTHON -c "import sphinx_rtd_theme" 2>/dev/null
>> +    if test $? -eq 0;
>> +    then
>> +        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
>> +$as_echo "yes" >&6; }
>> +        eval HAVE_PYMOD_SPHINX_RTD_THEME=yes
>> +    else
>> +        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
>> +$as_echo "no" >&6; }
>> +        eval HAVE_PYMOD_SPHINX_RTD_THEME=no
>> +        #
>> +        if test -n "yes"
>> +        then
>> +            as_fn_error $? "failed to find required module 
>> sphinx_rtd_theme" "$LINENO" 5
>> +            exit 1
>> +        fi
>> +    fi
>> +
>> +
>> +
>> +fi
>> +
>> 
>> # Extract the first word of "perl", so it can be a program name with args.
>> set dummy perl; ac_word=$2
>> diff --git a/docs/configure.ac b/docs/configure.ac
>> index c2e5edd3b3..a2ff55f30a 100644
>> --- a/docs/configure.ac
>> +++ b/docs/configure.ac
>> @@ -20,6 +20,7 @@ m4_include([../m4/docs_tool.m4])
>> m4_include([../m4/path_or_fail.m4])
>> m4_include([../m4/features.m4])
>> m4_include([../m4/paths.m4])
>> +m4_include([../m4/ax_python_module.m4])
>> 
>> AX_XEN_EXPAND_CONFIG()
>> 
>> @@ -29,6 +30,20 @@ AX_DOCS_TOOL_PROG([POD2HTML], [pod2html])
>> AX_DOCS_TOOL_PROG([POD2TEXT], [pod2text])
>> AX_DOCS_TOOL_PROG([PANDOC], [pandoc])
>> 
>> +# If sphinx is installed, make sure to have also the dependencies to build
>> +# Sphinx documentation.
>> +AC_CHECK_PROGS([SPHINXBUILD], [sphinx-build], [no])
>> +    AS_IF([test "x$SPHINXBUILD" = xno],
>> +        [AC_MSG_WARN(sphinx-build is not available so sphinx documentation \
>> +won't be built)],
>> +        [
>> +            AC_PATH_PROG([SPHINXBUILD], [sphinx-build])
>> +            AX_DOCS_TOOL_REQ_PROG([DOXYGEN], [doxygen])
>> +            AX_PYTHON_MODULE([breathe],[yes])
>> +            AX_PYTHON_MODULE([sphinx_rtd_theme], [yes])
>> +        ]
>> +    )
>> +
>> AC_ARG_VAR([PERL], [Path to Perl parser])
>> AX_PATH_PROG_OR_FAIL([PERL], [perl])
>> 
>> diff --git a/docs/xen-doxygen/customdoxygen.css 
>> b/docs/xen-doxygen/customdoxygen.css
>> new file mode 100644
>> index 0000000000..4735e41cf5
>> --- /dev/null
>> +++ b/docs/xen-doxygen/customdoxygen.css
>> @@ -0,0 +1,36 @@
>> +/* Custom CSS for Doxygen-generated HTML
>> + * Copyright (c) 2015 Intel Corporation
>> + * SPDX-License-Identifier: Apache-2.0
>> + */
>> +
>> +code {
>> +  font-family: Monaco,Menlo,Consolas,"Courier New",monospace;
>> +  background-color: #D8D8D8;
>> +  padding: 0 0.25em 0 0.25em;
>> +}
>> +
>> +pre.fragment {
>> +  display: block;
>> +  font-family: Monaco,Menlo,Consolas,"Courier New",monospace;
>> +  padding: 1rem;
>> +  word-break: break-all;
>> +  word-wrap: break-word;
>> +  white-space: pre;
>> +  background-color: #D8D8D8;
>> +}
>> +
>> +#projectlogo
>> +{
>> +  vertical-align: middle;
>> +}
>> +
>> +#projectname
>> +{
>> +  font: 200% Tahoma, Arial,sans-serif;
>> +  color: #3D578C;
>> +}
>> +
>> +#projectbrief
>> +{
>> +  color: #3D578C;
>> +}
>> diff --git a/docs/xen-doxygen/doxy-preprocessor.py 
>> b/docs/xen-doxygen/doxy-preprocessor.py
>> new file mode 100755
>> index 0000000000..496899d8e6
>> --- /dev/null
>> +++ b/docs/xen-doxygen/doxy-preprocessor.py
>> @@ -0,0 +1,110 @@
>> +#!/usr/bin/python3
>> +#
>> +# Copyright (c) 2021, Arm Limited.
>> +#
>> +# SPDX-License-Identifier: GPL-2.0
>> +#
>> +
>> +import os, sys, re
>> +
>> +
>> +# Variables that holds the preprocessed header text
>> +output_text = ""
>> +header_file_name = ""
>> +
>> +# Variables to enumerate the anonymous structs/unions
>> +anonymous_struct_count = 0
>> +anonymous_union_count = 0
>> +
>> +
>> +def error(text):
>> +    sys.stderr.write("{}\n".format(text))
>> +    sys.exit(1)
>> +
>> +
>> +def write_to_output(text):
>> +    sys.stdout.write(text)
>> +
>> +
>> +def insert_doxygen_header(text):
>> +    # Here the strategy is to insert the #include <doxygen_include.h> in the
>> +    # first line of the header
>> +    abspath = os.path.dirname(os.path.abspath(__file__))
>> +    text += "#include \"{}/doxygen_include.h\"\n".format(abspath)
>> +
>> +    return text
>> +
>> +
>> +def enumerate_anonymous(match):
>> +    global anonymous_struct_count
>> +    global anonymous_union_count
>> +
>> +    if "struct" in match.group(1):
>> +        label = "anonymous_struct_%d" % anonymous_struct_count
>> +        anonymous_struct_count += 1
>> +    else:
>> +        label = "anonymous_union_%d" % anonymous_union_count
>> +        anonymous_union_count += 1
>> +
>> +    return match.group(1) + " " + label + " {"
>> +
>> +
>> +def manage_anonymous_structs_unions(text):
>> +    # Match anonymous unions/structs with this pattern:
>> +    # struct/union {
>> +    #     [...]
>> +    #
>> +    # and substitute it in this way:
>> +    #
>> +    # struct anonymous_struct_# {
>> +    #     [...]
>> +    # or
>> +    # union anonymous_union_# {
>> +    #     [...]
>> +    # where # is a counter starting from zero, different between structs and
>> +    # unions
>> +    #
>> +    # We don't count anonymous union/struct that are part of a typedef 
>> because
>> +    # they don't create any issue for doxygen
>> +    text = re.sub(
>> +        "(?<!typedef\s)(struct|union)\s+?\{",
>> +        enumerate_anonymous,
>> +        text,
>> +        flags=re.S
>> +    )
>> +
>> +    return text
>> +
>> +
>> +def main(argv):
>> +    global output_text
>> +    global header_file_name
>> +
>> +    if len(argv) != 1:
>> +        error("Script called without arguments!")
>> +
>> +    header_file_name = argv[0]
>> +
>> +    # Open header file
>> +    input_header_file = open(header_file_name, 'r')
>> +    # Read all lines
>> +    lines = input_header_file.readlines()
>> +
>> +    # Inject config.h and some defines in the current header, during 
>> compilation
>> +    # this job is done by the -include argument passed to the compiler.
>> +    output_text = insert_doxygen_header(output_text)
>> +
>> +    # Load file content in a variable
>> +    for line in lines:
>> +        output_text += "{}".format(line)
>> +
>> +    # Try to get rid of any anonymous union/struct
>> +    output_text = manage_anonymous_structs_unions(output_text)
>> +
>> +    # Final stage of the preprocessor, print the output to stdout
>> +    write_to_output(output_text)
>> +
>> +
>> +if __name__ == "__main__":
>> +    main(sys.argv[1:])
>> +    sys.exit(0)
>> diff --git a/docs/xen-doxygen/doxy_input.list 
>> b/docs/xen-doxygen/doxy_input.list
>> new file mode 100644
>> index 0000000000..e69de29bb2
>> diff --git a/docs/xen-doxygen/doxygen_include.h.in 
>> b/docs/xen-doxygen/doxygen_include.h.in
>> new file mode 100644
>> index 0000000000..df284f3931
>> --- /dev/null
>> +++ b/docs/xen-doxygen/doxygen_include.h.in
>> @@ -0,0 +1,32 @@
>> +/*
>> + * Doxygen include header
>> + * It supplies the xen/include/xen/config.h that is included using the 
>> -include
>> + * argument of the compiler in Xen Makefile.
>> + * Other macros are defined because they are usually provided by the 
>> compiler.
>> + *
>> + * Copyright (C) 2021 ARM Limited
>> + *
>> + * Author: Luca Fancellu <luca.fancellu@xxxxxxx>
>> + *
>> + * SPDX-License-Identifier: GPL-2.0
>> + */
>> +
>> +#include "@XEN_BASE@/xen/include/xen/config.h"
>> +
>> +#if defined(CONFIG_X86_64)
>> +
>> +#define __x86_64__ 1
>> +
>> +#elif defined(CONFIG_ARM_64)
>> +
>> +#define __aarch64__ 1
>> +
>> +#elif defined(CONFIG_ARM_32)
>> +
>> +#define __arm__ 1
>> +
>> +#else
>> +
>> +#error Architecture not supported/recognized.
>> +
>> +#endif
>> diff --git a/docs/xen-doxygen/footer.html b/docs/xen-doxygen/footer.html
>> new file mode 100644
>> index 0000000000..a24bf2b9b4
>> --- /dev/null
>> +++ b/docs/xen-doxygen/footer.html
>> @@ -0,0 +1,21 @@
>> +<!-- HTML footer for doxygen 1.8.13-->
>> +<!-- start footer part -->
>> +<!--BEGIN GENERATE_TREEVIEW-->
>> +<div id="nav-path" class="navpath"><!-- id is needed for treeview function! 
>> -->
>> +  <ul>
>> +    $navpath
>> +    <li class="footer">$generatedby
>> +    <a href="http://www.doxygen.org/index.html";>
>> +    <img class="footer" src="$relpath^doxygen.png" alt="doxygen"/></a> 
>> $doxygenversion </li>
>> +  </ul>
>> +</div>
>> +<!--END GENERATE_TREEVIEW-->
>> +<!--BEGIN !GENERATE_TREEVIEW-->
>> +<hr class="footer"/><address class="footer"><small>
>> +$generatedby &#160;<a href="http://www.doxygen.org/index.html";>
>> +<img class="footer" src="$relpath^doxygen.png" alt="doxygen"/>
>> +</a> $doxygenversion
>> +</small></address>
>> +<!--END !GENERATE_TREEVIEW-->
>> +</body>
>> +</html>
>> diff --git a/docs/xen-doxygen/header.html b/docs/xen-doxygen/header.html
>> new file mode 100644
>> index 0000000000..83ac2f1835
>> --- /dev/null
>> +++ b/docs/xen-doxygen/header.html
>> @@ -0,0 +1,56 @@
>> +<!-- HTML header for doxygen 1.8.13-->
>> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
>> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
>> +<html xmlns="http://www.w3.org/1999/xhtml";>
>> +<head>
>> +<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
>> +<meta http-equiv="X-UA-Compatible" content="IE=9"/>
>> +<meta name="generator" content="Doxygen $doxygenversion"/>
>> +<meta name="viewport" content="width=device-width, initial-scale=1"/>
>> +<!--BEGIN PROJECT_NAME--><title>$projectname: $title</title><!--END 
>> PROJECT_NAME-->
>> +<!--BEGIN !PROJECT_NAME--><title>$title</title><!--END !PROJECT_NAME-->
>> +<link href="$relpath^tabs.css" rel="stylesheet" type="text/css"/>
>> +<script type="text/javascript" src="$relpath^jquery.js"></script>
>> +<script type="text/javascript" src="$relpath^dynsections.js"></script>
>> +$treeview
>> +$search
>> +$mathjax
>> +<link href="$relpath^$stylesheet" rel="stylesheet" type="text/css" />
>> +$extrastylesheet
>> +</head>
>> +<body>
>> +<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
>> +
>> +<!--BEGIN TITLEAREA-->
>> +<div id="titlearea">
>> +<table cellspacing="0" cellpadding="0">
>> + <tbody>
>> + <tr style="height: 56px;">
>> +  <!--BEGIN PROJECT_LOGO-->
>> +  <td id="projectlogo"><img alt="Logo" src="$relpath^$projectlogo"/></td>
>> +  <!--END PROJECT_LOGO-->
>> +  <!--BEGIN PROJECT_NAME-->
>> +  <td id="projectalign" style="padding-left: 1em;">
>> +   <div id="projectname">$projectname
>> +   <!--BEGIN PROJECT_NUMBER-->&#160;<span 
>> id="projectnumber">$projectnumber</span><!--END PROJECT_NUMBER-->
>> +   </div>
>> +   <!--BEGIN PROJECT_BRIEF--><div 
>> id="projectbrief">$projectbrief</div><!--END PROJECT_BRIEF-->
>> +  </td>
>> +  <!--END PROJECT_NAME-->
>> +  <!--BEGIN !PROJECT_NAME-->
>> +   <!--BEGIN PROJECT_BRIEF-->
>> +    <td style="padding-left: 0.5em;">
>> +    <div id="projectbrief">$projectbrief</div>
>> +    </td>
>> +   <!--END PROJECT_BRIEF-->
>> +  <!--END !PROJECT_NAME-->
>> +  <!--BEGIN DISABLE_INDEX-->
>> +   <!--BEGIN SEARCHENGINE-->
>> +   <td>$searchbox</td>
>> +   <!--END SEARCHENGINE-->
>> +  <!--END DISABLE_INDEX-->
>> + </tr>
>> + </tbody>
>> +</table>
>> +</div>
>> +<!--END TITLEAREA-->
>> +<!-- end header part -->
>> diff --git a/docs/xen-doxygen/mainpage.md b/docs/xen-doxygen/mainpage.md
>> new file mode 100644
>> index 0000000000..ff548b87fc
>> --- /dev/null
>> +++ b/docs/xen-doxygen/mainpage.md
>> @@ -0,0 +1,5 @@
>> +# API Documentation   {#index}
>> +
>> +## Introduction
>> +
>> +## Licensing
>> diff --git a/docs/xen-doxygen/xen_project_logo_165x67.png 
>> b/docs/xen-doxygen/xen_project_logo_165x67.png
>> new file mode 100644
>> index 
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>> zqL5!WvekBL-8R%V?zVyL=G&{be=K4bT`e{#t|)$A!YaA?jp;X)-+bB;zhj`(vULAW
>> z%ue3U;av{94wp%n<(7@__S@Z2PA@Mif3+uO&y|X06?J<Fdxd*PD}5`wsx+#0R=uxI
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>> zo_-(u{qS+0<2@%BCt82d{Gqm;(q7a7b>wu+b|!X?c13m#p7cK1({0<`{-e>4hfb-U
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>> z?<+s(e(3(_^YOu_)K8!O1p}D#{JO;G(*OVf32;bRa{vGf4*&oQ4*`<-1El}}02*{f
>> zSaefwW^{L9a%BKeVQFr3E>1;MAa*k@H7+qQF!XYv002BXNkl<ZcwX&&2Ur%z_P#e7
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>> z#Au5Dn|t;CJm2#^yWj4#-8pmSoS8GTMLrU$3Dg1V0S)qxwSgKyRp2vyrhkMg0%Wkd
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>> z+fW~4G{)LwjHRuWrIk&K7A;2c+FM}=GH^GbB|rwP43q&r(`WiaDhp7WH3WVE3K+3O
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>> zi=3QX0Yl2ehmXK)mt@z@J(7@+D3Oto;^X5hvuDqiY15{Ot*xy<lFGb!^CU1ZP-3EE
>> zWYwxwvTxr3xpe7@JbLs*NhdoyM{=@r1&n@V`0(LY$dAm~2WSQS2vBwS2KY?>M~Pi0
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>> zCMF6~y1BW@;>C-VxLdYtQKT&;<=e#WoV@zv@zZCMCQX`w@=={=18_9pGh_ab(zgI5
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>> zCk-M>=rd=|$e}}rWbfX6N@F>C<hX3#y8m^H=B*r&3`Yytz-atXY8D2|#Rm8d%2pJ|
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>> zyBsC{0%c`o<!ESVa9U6e4Duxlk<Xkg%TF+9Jnr4Qm)GZi0OjQ7%Inv!mD!(j=g!d)
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>> z2gY9{&Wm%lhjZn-cI}ep&6~>)RjZ3ygGO7?0Qvw`07Zv{RHl?<PeJvC9!4Ca<p>19
>> zbE*)fAkm9`3=GV2;6VMK<t0?(tsHCRz5f}aCwcpynzr(?w3s9zAz?COhKtgD)8&j3
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>> zj2WxfuU~)W%9ShksYc`{@u!rUn)+nt&Yc&1eSJ4}?%a7Yo}Ua>jm-Bp1K>ZIsj8)=
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>> zcOxwEg<wYGbLY<e0-cn)Bi+RQtArOzMZNc6P2I~jGiJ*q$C+X>-tINJF3x7rb&Se9
>> zbuKa@r&(2wC}heW1BQ+`&v=ua+{9#p?JLA_MqK(pQs1K68i(xMwDgRhO>}S(+v&5#
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>> 
>> diff --git a/docs/xen.doxyfile.in b/docs/xen.doxyfile.in
>> new file mode 100644
>> index 0000000000..00969d9b78
>> --- /dev/null
>> +++ b/docs/xen.doxyfile.in
>> @@ -0,0 +1,2316 @@
>> +# Doxyfile 1.8.13
>> +
>> +# This file describes the settings to be used by the documentation system
>> +# doxygen (www.doxygen.org) for a project.
>> +#
>> +# All text after a double hash (##) is considered a comment and is placed in
>> +# front of the TAG it is preceding.
>> +#
>> +# All text after a single hash (#) is considered a comment and will be 
>> ignored.
>> +# The format is:
>> +# TAG = value [value, ...]
>> +# For lists, items can also be appended using:
>> +# TAG += value [value, ...]
>> +# Values that contain spaces should be placed between quotes (\" \").
>> +#
>> +# This file is base on doc/zephyr.doxyfile.in zephry 2.3
>> +
>> +#---------------------------------------------------------------------------
>> +# Project related configuration options
>> +#---------------------------------------------------------------------------
>> +
>> +# This tag specifies the encoding used for all characters in the config file
>> +# that follow. The default is UTF-8 which is also the encoding used for all 
>> text
>> +# before the first occurrence of this tag. Doxygen uses libiconv (or the 
>> iconv
>> +# built into libc) for the transcoding. See
>> +# https://www.gnu.org/software/libiconv/ for the list of possible encodings.
>> +# The default value is: UTF-8.
>> +
>> +DOXYFILE_ENCODING      = UTF-8
>> +
>> +# The PROJECT_NAME tag is a single word (or a sequence of words surrounded 
>> by
>> +# double-quotes, unless you are using Doxywizard) that should identify the
>> +# project for which the documentation is generated. This name is used in the
>> +# title of most generated pages and in a few other places.
>> +# The default value is: My Project.
>> +
>> +PROJECT_NAME           = "Xen Project"
>> +
>> +# The PROJECT_NUMBER tag can be used to enter a project or revision number. 
>> This
>> +# could be handy for archiving the generated documentation or if some 
>> version
>> +# control system is used.
>> +
>> +PROJECT_NUMBER         =
>> +
>> +# Using the PROJECT_BRIEF tag one can provide an optional one line 
>> description
>> +# for a project that appears at the top of each page and should give viewer 
>> a
>> +# quick idea about the purpose of the project. Keep the description short.
>> +
>> +PROJECT_BRIEF          = "An Open Source Type 1 Hypervisor"
>> +
>> +# With the PROJECT_LOGO tag one can specify a logo or an icon that is 
>> included
>> +# in the documentation. The maximum height of the logo should not exceed 55
>> +# pixels and the maximum width should not exceed 200 pixels. Doxygen will 
>> copy
>> +# the logo to the output directory.
>> +
>> +PROJECT_LOGO           = "xen-doxygen/xen_project_logo_165x67.png"
>> +
>> +# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
>> path
>> +# into which the generated documentation will be written. If a relative 
>> path is
>> +# entered, it will be relative to the location where doxygen was started. If
>> +# left blank the current directory will be used.
>> +
>> +OUTPUT_DIRECTORY       = @DOXY_OUT@
>> +
>> +# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
>> +# directories (in 2 levels) under the output directory of each output 
>> format and
>> +# will distribute the generated files over these directories. Enabling this
>> +# option can be useful when feeding doxygen a huge amount of source files, 
>> where
>> +# putting all generated files in the same directory would otherwise causes
>> +# performance problems for the file system.
>> +# The default value is: NO.
>> +
>> +CREATE_SUBDIRS         = NO
>> +
>> +# The OUTPUT_LANGUAGE tag is used to specify the language in which all
>> +# documentation generated by doxygen is written. Doxygen will use this
>> +# information to generate all constant output in the proper language.
>> +# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, 
>> Chinese,
>> +# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United 
>> States),
>> +# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian,
>> +# Indonesian, Italian, Japanese, Japanese-en (Japanese with English 
>> messages),
>> +# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian,
>> +# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, 
>> Russian,
>> +# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish,
>> +# Ukrainian and Vietnamese.
>> +# The default value is: English.
>> +
>> +OUTPUT_LANGUAGE        = English
>> +
>> +# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief 
>> member
>> +# descriptions after the members that are listed in the file and class
>> +# documentation (similar to Javadoc). Set to NO to disable this.
>> +# The default value is: YES.
>> +
>> +BRIEF_MEMBER_DESC      = YES
>> +
>> +# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief
>> +# description of a member or function before the detailed description
>> +#
>> +# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
>> +# brief descriptions will be completely suppressed.
>> +# The default value is: YES.
>> +
>> +REPEAT_BRIEF           = YES
>> +
>> +# This tag implements a quasi-intelligent brief description abbreviator 
>> that is
>> +# used to form the text in various listings. Each string in this list, if 
>> found
>> +# as the leading text of the brief description, will be stripped from the 
>> text
>> +# and the result, after processing the whole list, is used as the annotated
>> +# text. Otherwise, the brief description is used as-is. If left blank, the
>> +# following values are used ($name is automatically replaced with the name 
>> of
>> +# the entity):The $name class, The $name widget, The $name file, is, 
>> provides,
>> +# specifies, contains, represents, a, an and the.
>> +
>> +ABBREVIATE_BRIEF       = YES
>> +
>> +# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
>> +# doxygen will generate a detailed section even if there is only a brief
>> +# description.
>> +# The default value is: NO.
>> +
>> +ALWAYS_DETAILED_SEC    = YES
>> +
>> +# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all
>> +# inherited members of a class in the documentation of that class as if 
>> those
>> +# members were ordinary class members. Constructors, destructors and 
>> assignment
>> +# operators of the base classes will not be shown.
>> +# The default value is: NO.
>> +
>> +INLINE_INHERITED_MEMB  = YES
>> +
>> +# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full 
>> path
>> +# before files name in the file list and in the header files. If set to NO 
>> the
>> +# shortest path that makes the file name unique will be used
>> +# The default value is: YES.
>> +
>> +FULL_PATH_NAMES        = YES
>> +
>> +# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the 
>> path.
>> +# Stripping is only done if one of the specified strings matches the 
>> left-hand
>> +# part of the path. The tag can be used to show relative paths in the file 
>> list.
>> +# If left blank the directory from which doxygen is run is used as the path 
>> to
>> +# strip.
>> +#
>> +# Note that you can specify absolute paths here, but also relative paths, 
>> which
>> +# will be relative from the directory where doxygen is started.
>> +# This tag requires that the tag FULL_PATH_NAMES is set to YES.
>> +
>> +STRIP_FROM_PATH        = @XEN_BASE@
>> +
>> +# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of 
>> the
>> +# path mentioned in the documentation of a class, which tells the reader 
>> which
>> +# header file to include in order to use a class. If left blank only the 
>> name of
>> +# the header file containing the class definition is used. Otherwise one 
>> should
>> +# specify the list of include paths that are normally passed to the compiler
>> +# using the -I flag.
>> +
>> +STRIP_FROM_INC_PATH    =
>> +
>> +# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter 
>> (but
>> +# less readable) file names. This can be useful is your file systems doesn't
>> +# support long names like on DOS, Mac, or CD-ROM.
>> +# The default value is: NO.
>> +
>> +SHORT_NAMES            = NO
>> +
>> +# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the
>> +# first line (until the first dot) of a Javadoc-style comment as the brief
>> +# description. If set to NO, the Javadoc-style will behave just like 
>> regular Qt-
>> +# style comments (thus requiring an explicit @brief command for a brief
>> +# description.)
>> +# The default value is: NO.
>> +
>> +JAVADOC_AUTOBRIEF      = NO
>> +
>> +# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the 
>> first
>> +# line (until the first dot) of a Qt-style comment as the brief 
>> description. If
>> +# set to NO, the Qt-style will behave just like regular Qt-style comments 
>> (thus
>> +# requiring an explicit \brief command for a brief description.)
>> +# The default value is: NO.
>> +
>> +QT_AUTOBRIEF           = NO
>> +
>> +# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
>> +# multi-line C++ special comment block (i.e. a block of //! or /// 
>> comments) as
>> +# a brief description. This used to be the default behavior. The new 
>> default is
>> +# to treat a multi-line C++ comment block as a detailed description. Set 
>> this
>> +# tag to YES if you prefer the old behavior instead.
>> +#
>> +# Note that setting this tag to YES also means that rational rose comments 
>> are
>> +# not recognized any more.
>> +# The default value is: NO.
>> +
>> +MULTILINE_CPP_IS_BRIEF = NO
>> +
>> +# If the INHERIT_DOCS tag is set to YES then an undocumented member 
>> inherits the
>> +# documentation from any documented member that it re-implements.
>> +# The default value is: YES.
>> +
>> +INHERIT_DOCS           = YES
>> +
>> +# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce 
>> a new
>> +# page for each member. If set to NO, the documentation of a member will be 
>> part
>> +# of the file/class/namespace that contains it.
>> +# The default value is: NO.
>> +
>> +SEPARATE_MEMBER_PAGES  = YES
>> +
>> +# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen
>> +# uses this value to replace tabs by spaces in code fragments.
>> +# Minimum value: 1, maximum value: 16, default value: 4.
>> +
>> +TAB_SIZE               = 8
>> +
>> +# This tag can be used to specify a number of aliases that act as commands 
>> in
>> +# the documentation. An alias has the form:
>> +# name=value
>> +# For example adding
>> +# "sideeffect=@par Side Effects:\n"
>> +# will allow you to put the command \sideeffect (or @sideeffect) in the
>> +# documentation, which will result in a user-defined paragraph with heading
>> +# "Side Effects:". You can put \n's in the value part of an alias to insert
>> +# newlines.
>> +
>> +ALIASES                = "rst=\verbatim embed:rst:leading-asterisk" \
>> +                         "endrst=\endverbatim" \
>> +                         "keepindent=\code" \
>> +                         "endkeepindent=\endcode"
>> +
>> +ALIASES += req{1}="\ref XEN_\1 \"XEN-\1\" "
>> +ALIASES += satisfy{1}="\xrefitem satisfy \"Satisfies requirement\" 
>> \"Requirement Implementation\" \1"
>> +ALIASES += verify{1}="\xrefitem verify \"Verifies requirement\" 
>> \"Requirement Verification\" \1"
>> +
>> +# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C 
>> sources
>> +# only. Doxygen will then generate output that is more tailored for C. For
>> +# instance, some of the names that are used will be different. The list of 
>> all
>> +# members will be omitted, etc.
>> +# The default value is: NO.
>> +
>> +OPTIMIZE_OUTPUT_FOR_C  = YES
>> +
>> +# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java 
>> or
>> +# Python sources only. Doxygen will then generate output that is more 
>> tailored
>> +# for that language. For instance, namespaces will be presented as packages,
>> +# qualified scopes will look different, etc.
>> +# The default value is: NO.
>> +
>> +OPTIMIZE_OUTPUT_JAVA   = NO
>> +
>> +# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of 
>> Fortran
>> +# sources. Doxygen will then generate output that is tailored for Fortran.
>> +# The default value is: NO.
>> +
>> +OPTIMIZE_FOR_FORTRAN   = NO
>> +
>> +# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
>> +# sources. Doxygen will then generate output that is tailored for VHDL.
>> +# The default value is: NO.
>> +
>> +OPTIMIZE_OUTPUT_VHDL   = NO
>> +
>> +# Doxygen selects the parser to use depending on the extension of the files 
>> it
>> +# parses. With this tag you can assign which parser to use for a given
>> +# extension. Doxygen has a built-in mapping, but you can override or extend 
>> it
>> +# using this tag. The format is ext=language, where ext is a file 
>> extension, and
>> +# language is one of the parsers supported by doxygen: IDL, Java, 
>> Javascript,
>> +# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran:
>> +# FortranFixed, free formatted Fortran: FortranFree, unknown formatted 
>> Fortran:
>> +# Fortran. In the later case the parser tries to guess whether the code is 
>> fixed
>> +# or free formatted code, this is the default for Fortran type files), 
>> VHDL. For
>> +# instance to make doxygen treat .inc files as Fortran files (default is 
>> PHP),
>> +# and .f files as C (default is Fortran), use: inc=Fortran f=C.
>> +#
>> +# Note: For files without extension you can use no_extension as a 
>> placeholder.
>> +#
>> +# Note that for custom extensions you also need to set FILE_PATTERNS 
>> otherwise
>> +# the files are not read by doxygen.
>> +
>> +EXTENSION_MAPPING      =
>> +
>> +# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all 
>> comments
>> +# according to the Markdown format, which allows for more readable
>> +# documentation. See http://daringfireball.net/projects/markdown/ for 
>> details.
>> +# The output of markdown processing is further processed by doxygen, so you 
>> can
>> +# mix doxygen, HTML, and XML commands with Markdown formatting. Disable 
>> only in
>> +# case of backward compatibilities issues.
>> +# The default value is: YES.
>> +
>> +MARKDOWN_SUPPORT       = YES
>> +
>> +# When enabled doxygen tries to link words that correspond to documented
>> +# classes, or namespaces to their corresponding documentation. Such a link 
>> can
>> +# be prevented in individual cases by putting a % sign in front of the word 
>> or
>> +# globally by setting AUTOLINK_SUPPORT to NO.
>> +# The default value is: YES.
>> +
>> +AUTOLINK_SUPPORT       = YES
>> +
>> +# If you use STL classes (i.e. std::string, std::vector, etc.) but do not 
>> want
>> +# to include (a tag file for) the STL sources as input, then you should set 
>> this
>> +# tag to YES in order to let doxygen match functions declarations and
>> +# definitions whose arguments contain STL classes (e.g. func(std::string);
>> +# versus func(std::string) {}). This also make the inheritance and 
>> collaboration
>> +# diagrams that involve STL classes more complete and accurate.
>> +# The default value is: NO.
>> +
>> +BUILTIN_STL_SUPPORT    = NO
>> +
>> +# If you use Microsoft's C++/CLI language, you should set this option to 
>> YES to
>> +# enable parsing support.
>> +# The default value is: NO.
>> +
>> +CPP_CLI_SUPPORT        = YES
>> +
>> +# Set the SIP_SUPPORT tag to YES if your project consists of sip (see:
>> +# https://www.riverbankcomputing.com/software/sip/intro) sources only. 
>> Doxygen
>> +# will parse them like normal C++ but will assume all classes use public 
>> instead
>> +# of private inheritance when no explicit protection keyword is present.
>> +# The default value is: NO.
>> +
>> +SIP_SUPPORT            = NO
>> +
>> +# For Microsoft's IDL there are propget and propput attributes to indicate
>> +# getter and setter methods for a property. Setting this option to YES will 
>> make
>> +# doxygen to replace the get and set methods by a property in the 
>> documentation.
>> +# This will only work if the methods are indeed getting or setting a simple
>> +# type. If this is not the case, or you want to show the methods anyway, you
>> +# should set this option to NO.
>> +# The default value is: YES.
>> +
>> +IDL_PROPERTY_SUPPORT   = YES
>> +
>> +# If member grouping is used in the documentation and the 
>> DISTRIBUTE_GROUP_DOC
>> +# tag is set to YES then doxygen will reuse the documentation of the first
>> +# member in the group (if any) for the other members of the group. By 
>> default
>> +# all members of a group must be documented explicitly.
>> +# The default value is: NO.
>> +
>> +DISTRIBUTE_GROUP_DOC   = NO
>> +
>> +# Set the SUBGROUPING tag to YES to allow class member groups of the same 
>> type
>> +# (for instance a group of public functions) to be put as a subgroup of that
>> +# type (e.g. under the Public Functions section). Set it to NO to prevent
>> +# subgrouping. Alternatively, this can be done per class using the
>> +# \nosubgrouping command.
>> +# The default value is: YES.
>> +
>> +SUBGROUPING            = YES
>> +
>> +# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and 
>> unions
>> +# are shown inside the group in which they are included (e.g. using 
>> \ingroup)
>> +# instead of on a separate page (for HTML and Man pages) or section (for 
>> LaTeX
>> +# and RTF).
>> +#
>> +# Note that this feature does not work in combination with
>> +# SEPARATE_MEMBER_PAGES.
>> +# The default value is: NO.
>> +
>> +INLINE_GROUPED_CLASSES = NO
>> +
>> +# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and 
>> unions
>> +# with only public data fields or simple typedef fields will be shown 
>> inline in
>> +# the documentation of the scope in which they are defined (i.e. file,
>> +# namespace, or group documentation), provided this scope is documented. If 
>> set
>> +# to NO, structs, classes, and unions are shown on a separate page (for 
>> HTML and
>> +# Man pages) or section (for LaTeX and RTF).
>> +# The default value is: NO.
>> +
>> +INLINE_SIMPLE_STRUCTS  = YES
>> +
>> +# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or
>> +# enum is documented as struct, union, or enum with the name of the 
>> typedef. So
>> +# typedef struct TypeS {} TypeT, will appear in the documentation as a 
>> struct
>> +# with name TypeT. When disabled the typedef will appear as a member of a 
>> file,
>> +# namespace, or class. And the struct will be named TypeS. This can 
>> typically be
>> +# useful for C code in case the coding convention dictates that all compound
>> +# types are typedef'ed and only the typedef is referenced, never the tag 
>> name.
>> +# The default value is: NO.
>> +
>> +TYPEDEF_HIDES_STRUCT   = NO
>> +
>> +# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. 
>> This
>> +# cache is used to resolve symbols given their name and scope. Since this 
>> can be
>> +# an expensive process and often the same symbol appears multiple times in 
>> the
>> +# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too 
>> small
>> +# doxygen will become slower. If the cache is too large, memory is wasted. 
>> The
>> +# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid 
>> range
>> +# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536
>> +# symbols. At the end of a run doxygen will report the cache usage and 
>> suggest
>> +# the optimal cache size from a speed point of view.
>> +# Minimum value: 0, maximum value: 9, default value: 0.
>> +
>> +LOOKUP_CACHE_SIZE      = 9
>> +
>> +#---------------------------------------------------------------------------
>> +# Build related configuration options
>> +#---------------------------------------------------------------------------
>> +
>> +# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in
>> +# documentation are documented, even if no documentation was available. 
>> Private
>> +# class members and static file members will be hidden unless the
>> +# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES.
>> +# Note: This will also disable the warnings about undocumented members that 
>> are
>> +# normally produced when WARNINGS is set to YES.
>> +# The default value is: NO.
>> +
>> +EXTRACT_ALL            = YES
>> +
>> +# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class 
>> will
>> +# be included in the documentation.
>> +# The default value is: NO.
>> +
>> +EXTRACT_PRIVATE        = NO
>> +
>> +# If the EXTRACT_PACKAGE tag is set to YES, all members with package or 
>> internal
>> +# scope will be included in the documentation.
>> +# The default value is: NO.
>> +
>> +EXTRACT_PACKAGE        = YES
>> +
>> +# If the EXTRACT_STATIC tag is set to YES, all static members of a file 
>> will be
>> +# included in the documentation.
>> +# The default value is: NO.
>> +
>> +EXTRACT_STATIC         = YES
>> +
>> +# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) 
>> defined
>> +# locally in source files will be included in the documentation. If set to 
>> NO,
>> +# only classes defined in header files are included. Does not have any 
>> effect
>> +# for Java sources.
>> +# The default value is: YES.
>> +
>> +EXTRACT_LOCAL_CLASSES  = YES
>> +
>> +# This flag is only useful for Objective-C code. If set to YES, local 
>> methods,
>> +# which are defined in the implementation section but not in the interface 
>> are
>> +# included in the documentation. If set to NO, only methods in the 
>> interface are
>> +# included.
>> +# The default value is: NO.
>> +
>> +EXTRACT_LOCAL_METHODS  = YES
>> +
>> +# If this flag is set to YES, the members of anonymous namespaces will be
>> +# extracted and appear in the documentation as a namespace called
>> +# 'anonymous_namespace{file}', where file will be replaced with the base 
>> name of
>> +# the file that contains the anonymous namespace. By default anonymous 
>> namespace
>> +# are hidden.
>> +# The default value is: NO.
>> +
>> +EXTRACT_ANON_NSPACES   = NO
>> +
>> +# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all
>> +# undocumented members inside documented classes or files. If set to NO 
>> these
>> +# members will be included in the various overviews, but no documentation
>> +# section is generated. This option has no effect if EXTRACT_ALL is enabled.
>> +# The default value is: NO.
>> +
>> +HIDE_UNDOC_MEMBERS     = NO
>> +
>> +# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all
>> +# undocumented classes that are normally visible in the class hierarchy. If 
>> set
>> +# to NO, these classes will be included in the various overviews. This 
>> option
>> +# has no effect if EXTRACT_ALL is enabled.
>> +# The default value is: NO.
>> +
>> +HIDE_UNDOC_CLASSES     = NO
>> +
>> +# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all 
>> friend
>> +# (class|struct|union) declarations. If set to NO, these declarations will 
>> be
>> +# included in the documentation.
>> +# The default value is: NO.
>> +
>> +HIDE_FRIEND_COMPOUNDS  = NO
>> +
>> +# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any
>> +# documentation blocks found inside the body of a function. If set to NO, 
>> these
>> +# blocks will be appended to the function's detailed documentation block.
>> +# The default value is: NO.
>> +
>> +HIDE_IN_BODY_DOCS      = NO
>> +
>> +# The INTERNAL_DOCS tag determines if documentation that is typed after a
>> +# \internal command is included. If the tag is set to NO then the 
>> documentation
>> +# will be excluded. Set it to YES to include the internal documentation.
>> +# The default value is: NO.
>> +
>> +INTERNAL_DOCS          = NO
>> +
>> +# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate 
>> file
>> +# names in lower-case letters. If set to YES, upper-case letters are also
>> +# allowed. This is useful if you have classes or files whose names only 
>> differ
>> +# in case and if your file system supports case sensitive file names. 
>> Windows
>> +# and Mac users are advised to set this option to NO.
>> +# The default value is: system dependent.
>> +
>> +CASE_SENSE_NAMES       = YES
>> +
>> +# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members 
>> with
>> +# their full class and namespace scopes in the documentation. If set to 
>> YES, the
>> +# scope will be hidden.
>> +# The default value is: NO.
>> +
>> +HIDE_SCOPE_NAMES       = NO
>> +
>> +# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list 
>> of
>> +# the files that are included by a file in the documentation of that file.
>> +# The default value is: YES.
>> +
>> +SHOW_INCLUDE_FILES     = YES
>> +
>> +# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for 
>> each
>> +# grouped member an include statement to the documentation, telling the 
>> reader
>> +# which file to include in order to use the member.
>> +# The default value is: NO.
>> +
>> +SHOW_GROUPED_MEMB_INC  = YES
>> +
>> +# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list 
>> include
>> +# files with double quotes in the documentation rather than with sharp 
>> brackets.
>> +# The default value is: NO.
>> +
>> +FORCE_LOCAL_INCLUDES   = NO
>> +
>> +# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in 
>> the
>> +# documentation for inline members.
>> +# The default value is: YES.
>> +
>> +INLINE_INFO            = YES
>> +
>> +# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the
>> +# (detailed) documentation of file and class members alphabetically by 
>> member
>> +# name. If set to NO, the members will appear in declaration order.
>> +# The default value is: YES.
>> +
>> +SORT_MEMBER_DOCS       = YES
>> +
>> +# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
>> +# descriptions of file, namespace and class members alphabetically by member
>> +# name. If set to NO, the members will appear in declaration order. Note 
>> that
>> +# this will also influence the order of the classes in the class list.
>> +# The default value is: NO.
>> +
>> +SORT_BRIEF_DOCS        = NO
>> +
>> +# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
>> +# (brief and detailed) documentation of class members so that constructors 
>> and
>> +# destructors are listed first. If set to NO the constructors will appear 
>> in the
>> +# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS.
>> +# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting 
>> brief
>> +# member documentation.
>> +# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting
>> +# detailed member documentation.
>> +# The default value is: NO.
>> +
>> +SORT_MEMBERS_CTORS_1ST = NO
>> +
>> +# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the 
>> hierarchy
>> +# of group names into alphabetical order. If set to NO the group names will
>> +# appear in their defined order.
>> +# The default value is: NO.
>> +
>> +SORT_GROUP_NAMES       = YES
>> +
>> +# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be 
>> sorted by
>> +# fully-qualified names, including namespaces. If set to NO, the class list 
>> will
>> +# be sorted only by class name, not including the namespace part.
>> +# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
>> +# Note: This option applies only to the class list, not to the alphabetical
>> +# list.
>> +# The default value is: NO.
>> +
>> +SORT_BY_SCOPE_NAME     = YES
>> +
>> +# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do 
>> proper
>> +# type resolution of all parameters of a function it will reject a match 
>> between
>> +# the prototype and the implementation of a member function even if there is
>> +# only one candidate or it is obvious which candidate to choose by doing a
>> +# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still
>> +# accept a match between prototype and implementation in such cases.
>> +# The default value is: NO.
>> +
>> +STRICT_PROTO_MATCHING  = YES
>> +
>> +# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the 
>> todo
>> +# list. This list is created by putting \todo commands in the documentation.
>> +# The default value is: YES.
>> +
>> +GENERATE_TODOLIST      = NO
>> +
>> +# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the 
>> test
>> +# list. This list is created by putting \test commands in the documentation.
>> +# The default value is: YES.
>> +
>> +GENERATE_TESTLIST      = NO
>> +
>> +# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the 
>> bug
>> +# list. This list is created by putting \bug commands in the documentation.
>> +# The default value is: YES.
>> +
>> +GENERATE_BUGLIST       = NO
>> +
>> +# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable 
>> (NO)
>> +# the deprecated list. This list is created by putting \deprecated commands 
>> in
>> +# the documentation.
>> +# The default value is: YES.
>> +
>> +GENERATE_DEPRECATEDLIST= YES
>> +
>> +# The ENABLED_SECTIONS tag can be used to enable conditional documentation
>> +# sections, marked by \if <section_label> ... \endif and \cond 
>> <section_label>
>> +# ... \endcond blocks.
>> +
>> +ENABLED_SECTIONS       = YES
>> +
>> +# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that 
>> the
>> +# initial value of a variable or macro / define can have for it to appear 
>> in the
>> +# documentation. If the initializer consists of more lines than specified 
>> here
>> +# it will be hidden. Use a value of 0 to hide initializers completely. The
>> +# appearance of the value of individual variables and macros / defines can 
>> be
>> +# controlled using \showinitializer or \hideinitializer command in the
>> +# documentation regardless of this setting.
>> +# Minimum value: 0, maximum value: 10000, default value: 30.
>> +
>> +MAX_INITIALIZER_LINES  = 300
>> +
>> +# Set the SHOW_USED_FILES tag to NO to disable the list of files generated 
>> at
>> +# the bottom of the documentation of classes and structs. If set to YES, the
>> +# list will mention the files that were used to generate the documentation.
>> +# The default value is: YES.
>> +
>> +SHOW_USED_FILES        = YES
>> +
>> +# Set the SHOW_FILES tag to NO to disable the generation of the Files page. 
>> This
>> +# will remove the Files entry from the Quick Index and from the Folder Tree 
>> View
>> +# (if specified).
>> +# The default value is: YES.
>> +
>> +SHOW_FILES             = YES
>> +
>> +# Set the SHOW_NAMESPACES tag to NO to disable the generation of the 
>> Namespaces
>> +# page. This will remove the Namespaces entry from the Quick Index and from 
>> the
>> +# Folder Tree View (if specified).
>> +# The default value is: YES.
>> +
>> +SHOW_NAMESPACES        = YES
>> +
>> +# The FILE_VERSION_FILTER tag can be used to specify a program or script 
>> that
>> +# doxygen should invoke to get the current version for each file (typically 
>> from
>> +# the version control system). Doxygen will invoke the program by executing 
>> (via
>> +# popen()) the command command input-file, where command is the value of the
>> +# FILE_VERSION_FILTER tag, and input-file is the name of an input file 
>> provided
>> +# by doxygen. Whatever the program writes to standard output is used as the 
>> file
>> +# version. For an example see the documentation.
>> +
>> +FILE_VERSION_FILTER    =
>> +
>> +# The LAYOUT_FILE tag can be used to specify a layout file which will be 
>> parsed
>> +# by doxygen. The layout file controls the global structure of the generated
>> +# output files in an output format independent way. To create the layout 
>> file
>> +# that represents doxygen's defaults, run doxygen with the -l option. You 
>> can
>> +# optionally specify a file name after the option, if omitted 
>> DoxygenLayout.xml
>> +# will be used as the name of the layout file.
>> +#
>> +# Note that if you run doxygen from a directory containing a file called
>> +# DoxygenLayout.xml, doxygen will parse it automatically even if the 
>> LAYOUT_FILE
>> +# tag is left empty.
>> +
>> +LAYOUT_FILE            =
>> +
>> +# The CITE_BIB_FILES tag can be used to specify one or more bib files 
>> containing
>> +# the reference definitions. This must be a list of .bib files. The .bib
>> +# extension is automatically appended if omitted. This requires the bibtex 
>> tool
>> +# to be installed. See also https://en.wikipedia.org/wiki/BibTeX for more 
>> info.
>> +# For LaTeX the style of the bibliography can be controlled using
>> +# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available 
>> in the
>> +# search path. See also \cite for info how to create references.
>> +
>> +CITE_BIB_FILES         =
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to warning and progress messages
>> +#---------------------------------------------------------------------------
>> +
>> +# The QUIET tag can be used to turn on/off the messages that are generated 
>> to
>> +# standard output by doxygen. If QUIET is set to YES this implies that the
>> +# messages are off.
>> +# The default value is: NO.
>> +
>> +QUIET                  = YES
>> +
>> +# The WARNINGS tag can be used to turn on/off the warning messages that are
>> +# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES
>> +# this implies that the warnings are on.
>> +#
>> +# Tip: Turn warnings on while writing the documentation.
>> +# The default value is: YES.
>> +
>> +WARNINGS               = YES
>> +
>> +# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate
>> +# warnings for undocumented members. If EXTRACT_ALL is set to YES then this 
>> flag
>> +# will automatically be disabled.
>> +# The default value is: YES.
>> +
>> +WARN_IF_UNDOCUMENTED   = YES
>> +
>> +# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate 
>> warnings for
>> +# potential errors in the documentation, such as not documenting some 
>> parameters
>> +# in a documented function, or documenting parameters that don't exist or 
>> using
>> +# markup commands wrongly.
>> +# The default value is: YES.
>> +
>> +WARN_IF_DOC_ERROR      = YES
>> +
>> +# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions 
>> that
>> +# are documented, but have no documentation for their parameters or return
>> +# value. If set to NO, doxygen will only warn about wrong or incomplete
>> +# parameter documentation, but not about the absence of documentation.
>> +# The default value is: NO.
>> +
>> +WARN_NO_PARAMDOC       = NO
>> +
>> +# The WARN_FORMAT tag determines the format of the warning messages that 
>> doxygen
>> +# can produce. The string should contain the $file, $line, and $text tags, 
>> which
>> +# will be replaced by the file and line number from which the warning 
>> originated
>> +# and the warning text. Optionally the format may contain $version, which 
>> will
>> +# be replaced by the version of the file (if it could be obtained via
>> +# FILE_VERSION_FILTER)
>> +# The default value is: $file:$line: $text.
>> +
>> +WARN_FORMAT            = "$file:$line: $text"
>> +
>> +# The WARN_LOGFILE tag can be used to specify a file to which warning and 
>> error
>> +# messages should be written. If left blank the output is written to 
>> standard
>> +# error (stderr).
>> +
>> +WARN_LOGFILE           =
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the input files
>> +#---------------------------------------------------------------------------
>> +
>> +# The INPUT tag is used to specify the files and/or directories that contain
>> +# documented source files. You may enter file names like myfile.cpp or
>> +# directories like /usr/src/myproject. Separate the files or directories 
>> with
>> +# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
>> +# Note: If this tag is empty the current directory is searched.
>> +
>> +INPUT                  = "@XEN_BASE@/docs/xen-doxygen/mainpage.md"
>> +
>> +# This tag can be used to specify the character encoding of the source files
>> +# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen 
>> uses
>> +# libiconv (or the iconv built into libc) for the transcoding. See the 
>> libiconv
>> +# documentation (see: https://www.gnu.org/software/libiconv/) for the list 
>> of
>> +# possible encodings.
>> +# The default value is: UTF-8.
>> +
>> +INPUT_ENCODING         = UTF-8
>> +
>> +# If the value of the INPUT tag contains directories, you can use the
>> +# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
>> +# *.h) to filter out the source-files in the directories.
>> +#
>> +# Note that for custom extensions or not directly supported extensions you 
>> also
>> +# need to set EXTENSION_MAPPING for the extension otherwise the files are 
>> not
>> +# read by doxygen.
>> +#
>> +# If left blank the following patterns are tested:*.c, *.cc, *.cxx, *.cpp,
>> +# *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h,
>> +# *.hh, *.hxx, *.hpp, *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, 
>> *.inc,
>> +# *.m, *.markdown, *.md, *.mm, *.dox, *.py, *.pyw, *.f90, *.f95, *.f03, 
>> *.f08,
>> +# *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf and *.qsf.
>> +
>> +# This MUST be kept in sync with DOXY_SOURCES in doc/CMakeLists.txt
>> +# for incremental (and faster) builds to work correctly.
>> +FILE_PATTERNS          = "*.c" \
>> +                         "*.h" \
>> +                         "*.S" \
>> +                         "*.md"
>> +
>> +# The RECURSIVE tag can be used to specify whether or not subdirectories 
>> should
>> +# be searched for input files as well.
>> +# The default value is: NO.
>> +
>> +RECURSIVE              = YES
>> +
>> +# The EXCLUDE tag can be used to specify files and/or directories that 
>> should be
>> +# excluded from the INPUT source files. This way you can easily exclude a
>> +# subdirectory from a directory tree whose root is specified with the INPUT 
>> tag.
>> +#
>> +# Note that relative paths are relative to the directory from which doxygen 
>> is
>> +# run.
>> +
>> +EXCLUDE                = @XEN_BASE@/include/nothing.h
>> +
>> +# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
>> +# directories that are symbolic links (a Unix file system feature) are 
>> excluded
>> +# from the input.
>> +# The default value is: NO.
>> +
>> +EXCLUDE_SYMLINKS       = NO
>> +
>> +# If the value of the INPUT tag contains directories, you can use the
>> +# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
>> +# certain files from those directories.
>> +#
>> +# Note that the wildcards are matched against the file with absolute path, 
>> so to
>> +# exclude all test directories for example use the pattern */test/*
>> +
>> +EXCLUDE_PATTERNS       =
>> +
>> +# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
>> +# (namespaces, classes, functions, etc.) that should be excluded from the
>> +# output. The symbol name can be a fully qualified name, a word, or if the
>> +# wildcard * is used, a substring. Examples: ANamespace, AClass,
>> +# AClass::ANamespace, ANamespace::*Test
>> +#
>> +# Note that the wildcards are matched against the file with absolute path, 
>> so to
>> +# exclude all test directories use the pattern */test/*
>> +
>> +# Hide internal names (starting with an underscore, and doxygen-generated 
>> names
>> +# for nested unnamed unions that don't generate meaningful sphinx output 
>> anyway.
>> +EXCLUDE_SYMBOLS        =
>> +# _*  *.__unnamed__ z_* Z_*
>> +
>> +# The EXAMPLE_PATH tag can be used to specify one or more files or 
>> directories
>> +# that contain example code fragments that are included (see the \include
>> +# command).
>> +
>> +EXAMPLE_PATH           =
>> +
>> +# If the value of the EXAMPLE_PATH tag contains directories, you can use the
>> +# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
>> and
>> +# *.h) to filter out the source-files in the directories. If left blank all
>> +# files are included.
>> +
>> +EXAMPLE_PATTERNS       =
>> +
>> +# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
>> +# searched for input files to be used with the \include or \dontinclude 
>> commands
>> +# irrespective of the value of the RECURSIVE tag.
>> +# The default value is: NO.
>> +
>> +EXAMPLE_RECURSIVE      = YES
>> +
>> +# The IMAGE_PATH tag can be used to specify one or more files or directories
>> +# that contain images that are to be included in the documentation (see the
>> +# \image command).
>> +
>> +IMAGE_PATH             =
>> +
>> +# The INPUT_FILTER tag can be used to specify a program that doxygen should
>> +# invoke to filter for each input file. Doxygen will invoke the filter 
>> program
>> +# by executing (via popen()) the command:
>> +#
>> +# <filter> <input-file>
>> +#
>> +# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is 
>> the
>> +# name of an input file. Doxygen will then use the output that the filter
>> +# program writes to standard output. If FILTER_PATTERNS is specified, this 
>> tag
>> +# will be ignored.
>> +#
>> +# Note that the filter must not add or remove lines; it is applied before 
>> the
>> +# code is scanned, but not when the output code is generated. If lines are 
>> added
>> +# or removed, the anchors will not be placed correctly.
>> +#
>> +# Note that for custom extensions or not directly supported extensions you 
>> also
>> +# need to set EXTENSION_MAPPING for the extension otherwise the files are 
>> not
>> +# properly processed by doxygen.
>> +
>> +INPUT_FILTER           =
>> +
>> +# The FILTER_PATTERNS tag can be used to specify filters on a per file 
>> pattern
>> +# basis. Doxygen will compare the file name with each pattern and apply the
>> +# filter if there is a match. The filters are a list of the form: 
>> pattern=filter
>> +# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on 
>> how
>> +# filters are used. If the FILTER_PATTERNS tag is empty or if none of the
>> +# patterns match the file name, INPUT_FILTER is applied.
>> +#
>> +# Note that for custom extensions or not directly supported extensions you 
>> also
>> +# need to set EXTENSION_MAPPING for the extension otherwise the files are 
>> not
>> +# properly processed by doxygen.
>> +
>> +FILTER_PATTERNS     = 
>> *.h="\"@XEN_BASE@/docs/xen-doxygen/doxy-preprocessor.py\""
>> +
>> +# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set 
>> using
>> +# INPUT_FILTER) will also be used to filter the input files that are used 
>> for
>> +# producing the source files to browse (i.e. when SOURCE_BROWSER is set to 
>> YES).
>> +# The default value is: NO.
>> +
>> +FILTER_SOURCE_FILES    = NO
>> +
>> +# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per 
>> file
>> +# pattern. A pattern will override the setting for FILTER_PATTERN (if any) 
>> and
>> +# it is also possible to disable source filtering for a specific pattern 
>> using
>> +# *.ext= (so without naming a filter).
>> +# This tag requires that the tag FILTER_SOURCE_FILES is set to YES.
>> +
>> +FILTER_SOURCE_PATTERNS =
>> +
>> +# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file 
>> that
>> +# is part of the input, its contents will be placed on the main page
>> +# (index.html). This can be useful if you have a project on for instance 
>> GitHub
>> +# and want to reuse the introduction page also for the doxygen output.
>> +
>> +USE_MDFILE_AS_MAINPAGE = "mainpage.md"
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to source browsing
>> +#---------------------------------------------------------------------------
>> +
>> +# If the SOURCE_BROWSER tag is set to YES then a list of source files will 
>> be
>> +# generated. Documented entities will be cross-referenced with these 
>> sources.
>> +#
>> +# Note: To get rid of all source code in the generated output, make sure 
>> that
>> +# also VERBATIM_HEADERS is set to NO.
>> +# The default value is: NO.
>> +
>> +SOURCE_BROWSER         = NO
>> +
>> +# Setting the INLINE_SOURCES tag to YES will include the body of functions,
>> +# classes and enums directly into the documentation.
>> +# The default value is: NO.
>> +
>> +INLINE_SOURCES         = NO
>> +
>> +# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide 
>> any
>> +# special comment blocks from generated source code fragments. Normal C, 
>> C++ and
>> +# Fortran comments will always remain visible.
>> +# The default value is: YES.
>> +
>> +STRIP_CODE_COMMENTS    = YES
>> +
>> +# If the REFERENCED_BY_RELATION tag is set to YES then for each documented
>> +# function all documented functions referencing it will be listed.
>> +# The default value is: NO.
>> +
>> +REFERENCED_BY_RELATION = NO
>> +
>> +# If the REFERENCES_RELATION tag is set to YES then for each documented 
>> function
>> +# all documented entities called/used by that function will be listed.
>> +# The default value is: NO.
>> +
>> +REFERENCES_RELATION    = NO
>> +
>> +# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is 
>> set
>> +# to YES then the hyperlinks from functions in REFERENCES_RELATION and
>> +# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they 
>> will
>> +# link to the documentation.
>> +# The default value is: YES.
>> +
>> +REFERENCES_LINK_SOURCE = YES
>> +
>> +# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in 
>> the
>> +# source code will show a tooltip with additional information such as 
>> prototype,
>> +# brief description and links to the definition and documentation. Since 
>> this
>> +# will make the HTML file larger and loading of large files a bit slower, 
>> you
>> +# can opt to disable this feature.
>> +# The default value is: YES.
>> +# This tag requires that the tag SOURCE_BROWSER is set to YES.
>> +
>> +SOURCE_TOOLTIPS        = YES
>> +
>> +# If the USE_HTAGS tag is set to YES then the references to source code will
>> +# point to the HTML generated by the htags(1) tool instead of doxygen 
>> built-in
>> +# source browser. The htags tool is part of GNU's global source tagging 
>> system
>> +# (see https://www.gnu.org/software/global/global.html). You will need 
>> version
>> +# 4.8.6 or higher.
>> +#
>> +# To use it do the following:
>> +# - Install the latest version of global
>> +# - Enable SOURCE_BROWSER and USE_HTAGS in the config file
>> +# - Make sure the INPUT points to the root of the source tree
>> +# - Run doxygen as normal
>> +#
>> +# Doxygen will invoke htags (and that will in turn invoke gtags), so these
>> +# tools must be available from the command line (i.e. in the search path).
>> +#
>> +# The result: instead of the source browser generated by doxygen, the links 
>> to
>> +# source code will now point to the output of htags.
>> +# The default value is: NO.
>> +# This tag requires that the tag SOURCE_BROWSER is set to YES.
>> +
>> +USE_HTAGS              = NO
>> +
>> +# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a
>> +# verbatim copy of the header file for each class for which an include is
>> +# specified. Set to NO to disable this.
>> +# See also: Section \class.
>> +# The default value is: YES.
>> +
>> +VERBATIM_HEADERS       = YES
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the alphabetical class index
>> +#---------------------------------------------------------------------------
>> +
>> +# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all
>> +# compounds will be generated. Enable this if the project contains a lot of
>> +# classes, structs, unions or interfaces.
>> +# The default value is: YES.
>> +
>> +ALPHABETICAL_INDEX     = YES
>> +
>> +# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns 
>> in
>> +# which the alphabetical index list will be split.
>> +# Minimum value: 1, maximum value: 20, default value: 5.
>> +# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
>> +
>> +COLS_IN_ALPHA_INDEX    = 2
>> +
>> +# In case all classes in a project start with a common prefix, all classes 
>> will
>> +# be put under the same header in the alphabetical index. The IGNORE_PREFIX 
>> tag
>> +# can be used to specify a prefix (or a list of prefixes) that should be 
>> ignored
>> +# while generating the index headers.
>> +# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
>> +
>> +IGNORE_PREFIX          =
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the HTML output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output
>> +# The default value is: YES.
>> +
>> +GENERATE_HTML          = YES
>> +
>> +# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. 
>> If a
>> +# relative path is entered the value of OUTPUT_DIRECTORY will be put in 
>> front of
>> +# it.
>> +# The default directory is: html.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_OUTPUT            = html
>> +
>> +# The HTML_FILE_EXTENSION tag can be used to specify the file extension for 
>> each
>> +# generated HTML page (for example: .htm, .php, .asp).
>> +# The default value is: .html.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_FILE_EXTENSION    = .html
>> +
>> +# The HTML_HEADER tag can be used to specify a user-defined HTML header 
>> file for
>> +# each generated HTML page. If the tag is left blank doxygen will generate a
>> +# standard header.
>> +#
>> +# To get valid HTML the header file that includes any scripts and style 
>> sheets
>> +# that doxygen needs, which is dependent on the configuration options used 
>> (e.g.
>> +# the setting GENERATE_TREEVIEW). It is highly recommended to start with a
>> +# default header using
>> +# doxygen -w html new_header.html new_footer.html new_stylesheet.css
>> +# YourConfigFile
>> +# and then modify the file new_header.html. See also section "Doxygen usage"
>> +# for information on how to generate the default header that doxygen 
>> normally
>> +# uses.
>> +# Note: The header is subject to change so you typically have to regenerate 
>> the
>> +# default header when upgrading to a newer version of doxygen. For a 
>> description
>> +# of the possible markers and block names see the documentation.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_HEADER            = xen-doxygen/header.html
>> +
>> +# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for 
>> each
>> +# generated HTML page. If the tag is left blank doxygen will generate a 
>> standard
>> +# footer. See HTML_HEADER for more information on how to generate a default
>> +# footer and what special commands can be used inside the footer. See also
>> +# section "Doxygen usage" for information on how to generate the default 
>> footer
>> +# that doxygen normally uses.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_FOOTER            =
>> +
>> +# The HTML_STYLESHEET tag can be used to specify a user-defined cascading 
>> style
>> +# sheet that is used by each HTML page. It can be used to fine-tune the 
>> look of
>> +# the HTML output. If left blank doxygen will generate a default style 
>> sheet.
>> +# See also section "Doxygen usage" for information on how to generate the 
>> style
>> +# sheet that doxygen normally uses.
>> +# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, 
>> as
>> +# it is more robust and this tag (HTML_STYLESHEET) will in the future become
>> +# obsolete.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_STYLESHEET        =
>> +
>> +# The HTML_EXTRA_STYLESHEET tag can be used to specify additional 
>> user-defined
>> +# cascading style sheets that are included after the standard style sheets
>> +# created by doxygen. Using this option one can overrule certain style 
>> aspects.
>> +# This is preferred over using HTML_STYLESHEET since it does not replace the
>> +# standard style sheet and is therefore more robust against future updates.
>> +# Doxygen will copy the style sheet files to the output directory.
>> +# Note: The order of the extra style sheet files is of importance (e.g. the 
>> last
>> +# style sheet in the list overrules the setting of the previous ones in the
>> +# list). For an example see the documentation.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_EXTRA_STYLESHEET  = xen-doxygen/customdoxygen.css
>> +
>> +# The HTML_EXTRA_FILES tag can be used to specify one or more extra images 
>> or
>> +# other source files which should be copied to the HTML output directory. 
>> Note
>> +# that these files will be copied to the base HTML output directory. Use the
>> +# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these
>> +# files. In the HTML_STYLESHEET file, use the file name only. Also note 
>> that the
>> +# files will be copied as-is; there are no commands or markers available.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_EXTRA_FILES       =
>> +
>> +# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
>> +# will adjust the colors in the style sheet and background images according 
>> to
>> +# this color. Hue is specified as an angle on a colorwheel, see
>> +# https://en.wikipedia.org/wiki/Hue for more information. For instance the 
>> value
>> +# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 
>> 300
>> +# purple, and 360 is red again.
>> +# Minimum value: 0, maximum value: 359, default value: 220.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_COLORSTYLE_HUE    =
>> +
>> +# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the 
>> colors
>> +# in the HTML output. For a value of 0 the output will use grayscales only. 
>> A
>> +# value of 255 will produce the most vivid colors.
>> +# Minimum value: 0, maximum value: 255, default value: 100.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_COLORSTYLE_SAT    =
>> +
>> +# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the
>> +# luminance component of the colors in the HTML output. Values below 100
>> +# gradually make the output lighter, whereas values above 100 make the 
>> output
>> +# darker. The value divided by 100 is the actual gamma applied, so 80 
>> represents
>> +# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not
>> +# change the gamma.
>> +# Minimum value: 40, maximum value: 240, default value: 80.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_COLORSTYLE_GAMMA  =
>> +
>> +# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated 
>> HTML
>> +# page will contain the date and time when the page was generated. Setting 
>> this
>> +# to YES can help to show when doxygen was last run and thus if the
>> +# documentation is up to date.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_TIMESTAMP         = YES
>> +
>> +# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
>> +# documentation will contain sections that can be hidden and shown after the
>> +# page has loaded.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_DYNAMIC_SECTIONS  = YES
>> +
>> +# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of 
>> entries
>> +# shown in the various tree structured indices initially; the user can 
>> expand
>> +# and collapse entries dynamically later on. Doxygen will expand the tree to
>> +# such a level that at most the specified number of entries are visible 
>> (unless
>> +# a fully collapsed tree already exceeds this amount). So setting the 
>> number of
>> +# entries 1 will produce a full collapsed tree by default. 0 is a special 
>> value
>> +# representing an infinite number of entries and will result in a full 
>> expanded
>> +# tree by default.
>> +# Minimum value: 0, maximum value: 9999, default value: 100.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +HTML_INDEX_NUM_ENTRIES = 100
>> +
>> +# If the GENERATE_DOCSET tag is set to YES, additional index files will be
>> +# generated that can be used as input for Apple's Xcode 3 integrated 
>> development
>> +# environment (see: https://developer.apple.com/tools/xcode/), introduced 
>> with
>> +# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a
>> +# Makefile in the HTML output directory. Running make will produce the 
>> docset in
>> +# that directory and running make install will install the docset in
>> +# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find 
>> it at
>> +# startup. See 
>> https://developer.apple.com/tools/creatingdocsetswithdoxygen.html
>> +# for more information.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +GENERATE_DOCSET        = YES
>> +
>> +# This tag determines the name of the docset feed. A documentation feed 
>> provides
>> +# an umbrella under which multiple documentation sets from a single provider
>> +# (such as a company or product suite) can be grouped.
>> +# The default value is: Doxygen generated docs.
>> +# This tag requires that the tag GENERATE_DOCSET is set to YES.
>> +
>> +DOCSET_FEEDNAME        = "Doxygen generated docs"
>> +
>> +# This tag specifies a string that should uniquely identify the 
>> documentation
>> +# set bundle. This should be a reverse domain-name style string, e.g.
>> +# com.mycompany.MyDocSet. Doxygen will append .docset to the name.
>> +# The default value is: org.doxygen.Project.
>> +# This tag requires that the tag GENERATE_DOCSET is set to YES.
>> +
>> +DOCSET_BUNDLE_ID       = org.doxygen.Project
>> +
>> +# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely 
>> identify
>> +# the documentation publisher. This should be a reverse domain-name style
>> +# string, e.g. com.mycompany.MyDocSet.documentation.
>> +# The default value is: org.doxygen.Publisher.
>> +# This tag requires that the tag GENERATE_DOCSET is set to YES.
>> +
>> +DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
>> +
>> +# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher.
>> +# The default value is: Publisher.
>> +# This tag requires that the tag GENERATE_DOCSET is set to YES.
>> +
>> +DOCSET_PUBLISHER_NAME  = Publisher
>> +
>> +# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
>> +# additional HTML index files: index.hhp, index.hhc, and index.hhk. The
>> +# index.hhp is a project file that can be read by Microsoft's HTML Help 
>> Workshop
>> +# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on
>> +# Windows.
>> +#
>> +# The HTML Help Workshop contains a compiler that can convert all HTML 
>> output
>> +# generated by doxygen into a single compiled HTML file (.chm). Compiled 
>> HTML
>> +# files are now used as the Windows 98 help format, and will replace the old
>> +# Windows help format (.hlp) on all Windows platforms in the future. 
>> Compressed
>> +# HTML files also contain an index, a table of contents, and you can search 
>> for
>> +# words in the documentation. The HTML workshop also contains a viewer for
>> +# compressed HTML files.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +GENERATE_HTMLHELP      = NO
>> +
>> +# The CHM_FILE tag can be used to specify the file name of the resulting 
>> .chm
>> +# file. You can add a path in front of the file if the result should not be
>> +# written to the html output directory.
>> +# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
>> +
>> +CHM_FILE               = NO
>> +
>> +# The HHC_LOCATION tag can be used to specify the location (absolute path
>> +# including file name) of the HTML help compiler (hhc.exe). If non-empty,
>> +# doxygen will try to run the HTML help compiler on the generated index.hhp.
>> +# The file has to be specified with full path.
>> +# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
>> +
>> +HHC_LOCATION           =
>> +
>> +# The GENERATE_CHI flag controls if a separate .chi index file is generated
>> +# (YES) or that it should be included in the master .chm file (NO).
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
>> +
>> +GENERATE_CHI           = NO
>> +
>> +# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content 
>> (hhc)
>> +# and project file content.
>> +# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
>> +
>> +CHM_INDEX_ENCODING     =
>> +
>> +# The BINARY_TOC flag controls whether a binary table of contents is 
>> generated
>> +# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it
>> +# enables the Previous and Next buttons.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
>> +
>> +BINARY_TOC             = YES
>> +
>> +# The TOC_EXPAND flag can be set to YES to add extra items for group 
>> members to
>> +# the table of contents of the HTML help documentation and to the tree view.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
>> +
>> +TOC_EXPAND             = NO
>> +
>> +# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
>> +# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated 
>> that
>> +# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed 
>> Help
>> +# (.qch) of the generated HTML documentation.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +GENERATE_QHP           = NO
>> +
>> +# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to 
>> specify
>> +# the file name of the resulting .qch file. The path specified is relative 
>> to
>> +# the HTML output folder.
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QCH_FILE               =
>> +
>> +# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt 
>> Help
>> +# Project output. For more information please see Qt Help Project / 
>> Namespace
>> +# (see: http://doc.qt.io/qt-4.8/qthelpproject.html#namespace).
>> +# The default value is: org.doxygen.Project.
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QHP_NAMESPACE          = org.doxygen.Project
>> +
>> +# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating 
>> Qt
>> +# Help Project output. For more information please see Qt Help Project / 
>> Virtual
>> +# Folders (see: http://doc.qt.io/qt-4.8/qthelpproject.html#virtual-folders).
>> +# The default value is: doc.
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QHP_VIRTUAL_FOLDER     = doc
>> +
>> +# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom
>> +# filter to add. For more information please see Qt Help Project / Custom
>> +# Filters (see: http://doc.qt.io/qt-4.8/qthelpproject.html#custom-filters).
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QHP_CUST_FILTER_NAME   =
>> +
>> +# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the
>> +# custom filter to add. For more information please see Qt Help Project / 
>> Custom
>> +# Filters (see: http://doc.qt.io/qt-4.8/qthelpproject.html#custom-filters).
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QHP_CUST_FILTER_ATTRS  =
>> +
>> +# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this
>> +# project's filter section matches. Qt Help Project / Filter Attributes 
>> (see:
>> +# http://doc.qt.io/qt-4.8/qthelpproject.html#filter-attributes).
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QHP_SECT_FILTER_ATTRS  =
>> +
>> +# The QHG_LOCATION tag can be used to specify the location of Qt's
>> +# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the
>> +# generated .qhp file.
>> +# This tag requires that the tag GENERATE_QHP is set to YES.
>> +
>> +QHG_LOCATION           =
>> +
>> +# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files 
>> will be
>> +# generated, together with the HTML files, they form an Eclipse help 
>> plugin. To
>> +# install this plugin and make it available under the help contents menu in
>> +# Eclipse, the contents of the directory containing the HTML and XML files 
>> needs
>> +# to be copied into the plugins directory of eclipse. The name of the 
>> directory
>> +# within the plugins directory should be the same as the ECLIPSE_DOC_ID 
>> value.
>> +# After copying Eclipse needs to be restarted before the help appears.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +GENERATE_ECLIPSEHELP   = NO
>> +
>> +# A unique identifier for the Eclipse help plugin. When installing the 
>> plugin
>> +# the directory name containing the HTML and XML files should also have this
>> +# name. Each documentation set should have its own identifier.
>> +# The default value is: org.doxygen.Project.
>> +# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES.
>> +
>> +ECLIPSE_DOC_ID         = org.doxygen.Project
>> +
>> +# If you want full control over the layout of the generated HTML pages it 
>> might
>> +# be necessary to disable the index and replace it with your own. The
>> +# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) 
>> at top
>> +# of each HTML page. A value of NO enables the index and the value YES 
>> disables
>> +# it. Since the tabs in the index contain the same information as the 
>> navigation
>> +# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to 
>> YES.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +DISABLE_INDEX          = NO
>> +
>> +# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
>> +# structure should be generated to display hierarchical information. If the 
>> tag
>> +# value is set to YES, a side panel will be generated containing a tree-like
>> +# index structure (just like the one that is generated for HTML Help). For 
>> this
>> +# to work a browser that supports JavaScript, DHTML, CSS and frames is 
>> required
>> +# (i.e. any modern browser). Windows users are probably better off using the
>> +# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) 
>> one can
>> +# further fine-tune the look of the index. As an example, the default style
>> +# sheet generated by doxygen has an example that shows how to put an image 
>> at
>> +# the root of the tree instead of the PROJECT_NAME. Since the tree 
>> basically has
>> +# the same information as the tab index, you could consider setting
>> +# DISABLE_INDEX to YES when enabling this option.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +GENERATE_TREEVIEW      = YES
>> +
>> +# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values 
>> that
>> +# doxygen will group on one line in the generated HTML documentation.
>> +#
>> +# Note that a value of 0 will completely suppress the enum values from 
>> appearing
>> +# in the overview section.
>> +# Minimum value: 0, maximum value: 20, default value: 4.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +ENUM_VALUES_PER_LINE   = 4
>> +
>> +# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be 
>> used
>> +# to set the initial width (in pixels) of the frame in which the tree is 
>> shown.
>> +# Minimum value: 0, maximum value: 1500, default value: 250.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +TREEVIEW_WIDTH         = 250
>> +
>> +# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links 
>> to
>> +# external symbols imported via tag files in a separate window.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +EXT_LINKS_IN_WINDOW    = NO
>> +
>> +# Use this tag to change the font size of LaTeX formulas included as images 
>> in
>> +# the HTML documentation. When you change the font size after a successful
>> +# doxygen run you need to manually remove any form_*.png images from the 
>> HTML
>> +# output directory to force them to be regenerated.
>> +# Minimum value: 8, maximum value: 50, default value: 10.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +FORMULA_FONTSIZE       = 10
>> +
>> +# Use the FORMULA_TRANPARENT tag to determine whether or not the images
>> +# generated for formulas are transparent PNGs. Transparent PNGs are not
>> +# supported properly for IE 6.0, but are supported on all modern browsers.
>> +#
>> +# Note that when changing this option you need to delete any form_*.png 
>> files in
>> +# the HTML output directory before the changes have effect.
>> +# The default value is: YES.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +FORMULA_TRANSPARENT    = YES
>> +
>> +# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
>> +# https://www.mathjax.org) which uses client side Javascript for the 
>> rendering
>> +# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX
>> +# installed or if you want to formulas look prettier in the HTML output. 
>> When
>> +# enabled you may also need to install MathJax separately and configure the 
>> path
>> +# to it using the MATHJAX_RELPATH option.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +USE_MATHJAX            = NO
>> +
>> +# When MathJax is enabled you can set the default output format to be used 
>> for
>> +# the MathJax output. See the MathJax site (see:
>> +# http://docs.mathjax.org/en/latest/output.html) for more details.
>> +# Possible values are: HTML-CSS (which is slower, but has the best
>> +# compatibility), NativeMML (i.e. MathML) and SVG.
>> +# The default value is: HTML-CSS.
>> +# This tag requires that the tag USE_MATHJAX is set to YES.
>> +
>> +MATHJAX_FORMAT         = HTML-CSS
>> +
>> +# When MathJax is enabled you need to specify the location relative to the 
>> HTML
>> +# output directory using the MATHJAX_RELPATH option. The destination 
>> directory
>> +# should contain the MathJax.js script. For instance, if the mathjax 
>> directory
>> +# is located at the same level as the HTML output directory, then
>> +# MATHJAX_RELPATH should be ../mathjax. The default value points to the 
>> MathJax
>> +# Content Delivery Network so you can quickly see the result without 
>> installing
>> +# MathJax. However, it is strongly recommended to install a local copy of
>> +# MathJax from https://www.mathjax.org before deployment.
>> +# The default value is: http://cdn.mathjax.org/mathjax/latest.
>> +# This tag requires that the tag USE_MATHJAX is set to YES.
>> +
>> +MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
>> +
>> +# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
>> +# extension names that should be enabled during MathJax rendering. For 
>> example
>> +# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
>> +# This tag requires that the tag USE_MATHJAX is set to YES.
>> +
>> +MATHJAX_EXTENSIONS     =
>> +
>> +# The MATHJAX_CODEFILE tag can be used to specify a file with javascript 
>> pieces
>> +# of code that will be used on startup of the MathJax code. See the MathJax 
>> site
>> +# (see: http://docs.mathjax.org/en/latest/output.html) for more details. 
>> For an
>> +# example see the documentation.
>> +# This tag requires that the tag USE_MATHJAX is set to YES.
>> +
>> +MATHJAX_CODEFILE       =
>> +
>> +# When the SEARCHENGINE tag is enabled doxygen will generate a search box 
>> for
>> +# the HTML output. The underlying search engine uses javascript and DHTML 
>> and
>> +# should work on any modern browser. Note that when using HTML help
>> +# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET)
>> +# there is already a search function so this one should typically be 
>> disabled.
>> +# For large projects the javascript based search engine can be slow, then
>> +# enabling SERVER_BASED_SEARCH may provide a better solution. It is 
>> possible to
>> +# search using the keyboard; to jump to the search box use <access key> + S
>> +# (what the <access key> is depends on the OS and browser, but it is 
>> typically
>> +# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor 
>> down
>> +# key> to jump into the search results window, the results can be navigated
>> +# using the <cursor keys>. Press <Enter> to select an item or <escape> to 
>> cancel
>> +# the search. The filter options can be selected when the cursor is inside 
>> the
>> +# search box by pressing <Shift>+<cursor down>. Also here use the <cursor 
>> keys>
>> +# to select a filter and <Enter> or <escape> to activate or cancel the 
>> filter
>> +# option.
>> +# The default value is: YES.
>> +# This tag requires that the tag GENERATE_HTML is set to YES.
>> +
>> +SEARCHENGINE           = YES
>> +
>> +# When the SERVER_BASED_SEARCH tag is enabled the search engine will be
>> +# implemented using a web server instead of a web client using Javascript. 
>> There
>> +# are two flavors of web server based searching depending on the 
>> EXTERNAL_SEARCH
>> +# setting. When disabled, doxygen will generate a PHP script for searching 
>> and
>> +# an index file used by the script. When EXTERNAL_SEARCH is enabled the 
>> indexing
>> +# and searching needs to be provided by external tools. See the section
>> +# "External Indexing and Searching" for details.
>> +# The default value is: NO.
>> +# This tag requires that the tag SEARCHENGINE is set to YES.
>> +
>> +SERVER_BASED_SEARCH    = NO
>> +
>> +# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the 
>> PHP
>> +# script for searching. Instead the search results are written to an XML 
>> file
>> +# which needs to be processed by an external indexer. Doxygen will invoke an
>> +# external search engine pointed to by the SEARCHENGINE_URL option to 
>> obtain the
>> +# search results.
>> +#
>> +# Doxygen ships with an example indexer (doxyindexer) and search engine
>> +# (doxysearch.cgi) which are based on the open source search engine library
>> +# Xapian (see: https://xapian.org/).
>> +#
>> +# See the section "External Indexing and Searching" for details.
>> +# The default value is: NO.
>> +# This tag requires that the tag SEARCHENGINE is set to YES.
>> +
>> +EXTERNAL_SEARCH        = NO
>> +
>> +# The SEARCHENGINE_URL should point to a search engine hosted by a web 
>> server
>> +# which will return the search results when EXTERNAL_SEARCH is enabled.
>> +#
>> +# Doxygen ships with an example indexer (doxyindexer) and search engine
>> +# (doxysearch.cgi) which are based on the open source search engine library
>> +# Xapian (see: https://xapian.org/). See the section "External Indexing and
>> +# Searching" for details.
>> +# This tag requires that the tag SEARCHENGINE is set to YES.
>> +
>> +SEARCHENGINE_URL       =
>> +
>> +# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the 
>> unindexed
>> +# search data is written to a file for indexing by an external tool. With 
>> the
>> +# SEARCHDATA_FILE tag the name of this file can be specified.
>> +# The default file is: searchdata.xml.
>> +# This tag requires that the tag SEARCHENGINE is set to YES.
>> +
>> +SEARCHDATA_FILE        = searchdata.xml
>> +
>> +# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the
>> +# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This 
>> is
>> +# useful in combination with EXTRA_SEARCH_MAPPINGS to search through 
>> multiple
>> +# projects and redirect the results back to the right project.
>> +# This tag requires that the tag SEARCHENGINE is set to YES.
>> +
>> +EXTERNAL_SEARCH_ID     =
>> +
>> +# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through 
>> doxygen
>> +# projects other than the one defined by this configuration file, but that 
>> are
>> +# all added to the same external search index. Each project needs to have a
>> +# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id 
>> of
>> +# to a relative location where the documentation can be found. The format 
>> is:
>> +# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
>> +# This tag requires that the tag SEARCHENGINE is set to YES.
>> +
>> +EXTRA_SEARCH_MAPPINGS  =
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the LaTeX output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX 
>> output.
>> +# The default value is: YES.
>> +
>> +GENERATE_LATEX         = NO
>> +
>> +# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. 
>> If a
>> +# relative path is entered the value of OUTPUT_DIRECTORY will be put in 
>> front of
>> +# it.
>> +# The default directory is: latex.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_OUTPUT           = latex
>> +
>> +# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
>> +# invoked.
>> +#
>> +# Note that when enabling USE_PDFLATEX this option is only used for 
>> generating
>> +# bitmaps for formulas in the HTML output, but not in the Makefile that is
>> +# written to the output directory.
>> +# The default file is: latex.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_CMD_NAME         = latex
>> +
>> +# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to 
>> generate
>> +# index for LaTeX.
>> +# The default file is: makeindex.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +MAKEINDEX_CMD_NAME     = makeindex
>> +
>> +# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact 
>> LaTeX
>> +# documents. This may be useful for small projects and may help to save some
>> +# trees in general.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +COMPACT_LATEX          = NO
>> +
>> +# The PAPER_TYPE tag can be used to set the paper type that is used by the
>> +# printer.
>> +# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal 
>> (8.5 x
>> +# 14 inches) and executive (7.25 x 10.5 inches).
>> +# The default value is: a4.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +PAPER_TYPE             = a4
>> +
>> +# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package 
>> names
>> +# that should be included in the LaTeX output. The package can be specified 
>> just
>> +# by its name or with the correct syntax as to be used with the LaTeX
>> +# \usepackage command. To get the times font for instance you can specify :
>> +# EXTRA_PACKAGES=times or EXTRA_PACKAGES={times}
>> +# To use the option intlimits with the amsmath package you can specify:
>> +# EXTRA_PACKAGES=[intlimits]{amsmath}
>> +# If left blank no extra packages will be included.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +EXTRA_PACKAGES         =
>> +
>> +# The LATEX_HEADER tag can be used to specify a personal LaTeX header for 
>> the
>> +# generated LaTeX document. The header should contain everything until the 
>> first
>> +# chapter. If it is left blank doxygen will generate a standard header. See
>> +# section "Doxygen usage" for information on how to let doxygen write the
>> +# default header to a separate file.
>> +#
>> +# Note: Only use a user-defined header if you know what you are doing! The
>> +# following commands have a special meaning inside the header: $title,
>> +# $datetime, $date, $doxygenversion, $projectname, $projectnumber,
>> +# $projectbrief, $projectlogo. Doxygen will replace $title with the empty
>> +# string, for the replacement values of the other commands the user is 
>> referred
>> +# to HTML_HEADER.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_HEADER           =
>> +
>> +# The LATEX_FOOTER tag can be used to specify a personal LaTeX footer for 
>> the
>> +# generated LaTeX document. The footer should contain everything after the 
>> last
>> +# chapter. If it is left blank doxygen will generate a standard footer. See
>> +# LATEX_HEADER for more information on how to generate a default footer and 
>> what
>> +# special commands can be used inside the footer.
>> +#
>> +# Note: Only use a user-defined footer if you know what you are doing!
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_FOOTER           =
>> +
>> +# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images 
>> or
>> +# other source files which should be copied to the LATEX_OUTPUT output
>> +# directory. Note that the files will be copied as-is; there are no 
>> commands or
>> +# markers available.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_EXTRA_FILES      =
>> +
>> +# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is
>> +# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file 
>> will
>> +# contain links (just like the HTML output) instead of page references. This
>> +# makes the output suitable for online browsing using a PDF viewer.
>> +# The default value is: YES.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +PDF_HYPERLINKS         = YES
>> +
>> +# If the USE_PDFLATEX tag is set to YES, doxygen will use pdflatex to 
>> generate
>> +# the PDF file directly from the LaTeX files. Set this option to YES, to 
>> get a
>> +# higher quality PDF documentation.
>> +# The default value is: YES.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +USE_PDFLATEX           = YES
>> +
>> +# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \batchmode
>> +# command to the generated LaTeX files. This will instruct LaTeX to keep 
>> running
>> +# if errors occur, instead of asking the user for help. This option is also 
>> used
>> +# when generating formulas in HTML.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_BATCHMODE        = NO
>> +
>> +# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include 
>> the
>> +# index chapters (such as File Index, Compound Index, etc.) in the output.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_HIDE_INDICES     = NO
>> +
>> +# If the LATEX_SOURCE_CODE tag is set to YES then doxygen will include 
>> source
>> +# code with syntax highlighting in the LaTeX output.
>> +#
>> +# Note that which sources are shown also depends on other settings such as
>> +# SOURCE_BROWSER.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_SOURCE_CODE      = NO
>> +
>> +# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
>> +# bibliography, e.g. plainnat, or ieeetr. See
>> +# https://en.wikipedia.org/wiki/BibTeX and \cite for more info.
>> +# The default value is: plain.
>> +# This tag requires that the tag GENERATE_LATEX is set to YES.
>> +
>> +LATEX_BIB_STYLE        = plain
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the RTF output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. 
>> The
>> +# RTF output is optimized for Word 97 and may not look too pretty with 
>> other RTF
>> +# readers/editors.
>> +# The default value is: NO.
>> +
>> +GENERATE_RTF           = NO
>> +
>> +# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a
>> +# relative path is entered the value of OUTPUT_DIRECTORY will be put in 
>> front of
>> +# it.
>> +# The default directory is: rtf.
>> +# This tag requires that the tag GENERATE_RTF is set to YES.
>> +
>> +RTF_OUTPUT             = rtf
>> +
>> +# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF
>> +# documents. This may be useful for small projects and may help to save some
>> +# trees in general.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_RTF is set to YES.
>> +
>> +COMPACT_RTF            = NO
>> +
>> +# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will
>> +# contain hyperlink fields. The RTF file will contain links (just like the 
>> HTML
>> +# output) instead of page references. This makes the output suitable for 
>> online
>> +# browsing using Word or some other Word compatible readers that support 
>> those
>> +# fields.
>> +#
>> +# Note: WordPad (write) and others do not support links.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_RTF is set to YES.
>> +
>> +RTF_HYPERLINKS         = YES
>> +
>> +# Load stylesheet definitions from file. Syntax is similar to doxygen's 
>> config
>> +# file, i.e. a series of assignments. You only have to provide replacements,
>> +# missing definitions are set to their default value.
>> +#
>> +# See also section "Doxygen usage" for information on how to generate the
>> +# default style sheet that doxygen normally uses.
>> +# This tag requires that the tag GENERATE_RTF is set to YES.
>> +
>> +RTF_STYLESHEET_FILE    =
>> +
>> +# Set optional variables used in the generation of an RTF document. Syntax 
>> is
>> +# similar to doxygen's config file. A template extensions file can be 
>> generated
>> +# using doxygen -e rtf extensionFile.
>> +# This tag requires that the tag GENERATE_RTF is set to YES.
>> +
>> +RTF_EXTENSIONS_FILE    =
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the man page output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for
>> +# classes and files.
>> +# The default value is: NO.
>> +
>> +GENERATE_MAN           = NO
>> +
>> +# The MAN_OUTPUT tag is used to specify where the man pages will be put. If 
>> a
>> +# relative path is entered the value of OUTPUT_DIRECTORY will be put in 
>> front of
>> +# it. A directory man3 will be created inside the directory specified by
>> +# MAN_OUTPUT.
>> +# The default directory is: man.
>> +# This tag requires that the tag GENERATE_MAN is set to YES.
>> +
>> +MAN_OUTPUT             = man
>> +
>> +# The MAN_EXTENSION tag determines the extension that is added to the 
>> generated
>> +# man pages. In case the manual section does not start with a number, the 
>> number
>> +# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is
>> +# optional.
>> +# The default value is: .3.
>> +# This tag requires that the tag GENERATE_MAN is set to YES.
>> +
>> +MAN_EXTENSION          = .3
>> +
>> +# If the MAN_LINKS tag is set to YES and doxygen generates man output, then 
>> it
>> +# will generate one additional man file for each entity documented in the 
>> real
>> +# man page(s). These additional files only source the real man page, but 
>> without
>> +# them the man command would be unable to find the correct page.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_MAN is set to YES.
>> +
>> +MAN_LINKS              = NO
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the XML output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file 
>> that
>> +# captures the structure of the code including all documentation.
>> +# The default value is: NO.
>> +
>> +GENERATE_XML           = YES
>> +
>> +# The XML_OUTPUT tag is used to specify where the XML pages will be put. If 
>> a
>> +# relative path is entered the value of OUTPUT_DIRECTORY will be put in 
>> front of
>> +# it.
>> +# The default directory is: xml.
>> +# This tag requires that the tag GENERATE_XML is set to YES.
>> +
>> +XML_OUTPUT             = xml
>> +
>> +# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
>> +# listings (including syntax highlighting and cross-referencing 
>> information) to
>> +# the XML output. Note that enabling this will significantly increase the 
>> size
>> +# of the XML output.
>> +# The default value is: YES.
>> +# This tag requires that the tag GENERATE_XML is set to YES.
>> +
>> +XML_PROGRAMLISTING     = YES
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the DOCBOOK output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook 
>> files
>> +# that can be used to generate PDF.
>> +# The default value is: NO.
>> +
>> +GENERATE_DOCBOOK       = NO
>> +
>> +# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be 
>> put.
>> +# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in
>> +# front of it.
>> +# The default directory is: docbook.
>> +# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
>> +
>> +DOCBOOK_OUTPUT         = docbook
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options for the AutoGen Definitions output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_AUTOGEN_DEF tag is set to YES, doxygen will generate an
>> +# AutoGen Definitions (see http://autogen.sourceforge.net/) file that 
>> captures
>> +# the structure of the code including all documentation. Note that this 
>> feature
>> +# is still experimental and incomplete at the moment.
>> +# The default value is: NO.
>> +
>> +GENERATE_AUTOGEN_DEF   = NO
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the Perl module output
>> +#---------------------------------------------------------------------------
>> +
>> +# If the GENERATE_PERLMOD tag is set to YES, doxygen will generate a Perl 
>> module
>> +# file that captures the structure of the code including all documentation.
>> +#
>> +# Note that this feature is still experimental and incomplete at the moment.
>> +# The default value is: NO.
>> +
>> +GENERATE_PERLMOD       = NO
>> +
>> +# If the PERLMOD_LATEX tag is set to YES, doxygen will generate the 
>> necessary
>> +# Makefile rules, Perl scripts and LaTeX code to be able to generate PDF 
>> and DVI
>> +# output from the Perl module output.
>> +# The default value is: NO.
>> +# This tag requires that the tag GENERATE_PERLMOD is set to YES.
>> +
>> +PERLMOD_LATEX          = NO
>> +
>> +# If the PERLMOD_PRETTY tag is set to YES, the Perl module output will be 
>> nicely
>> +# formatted so it can be parsed by a human reader. This is useful if you 
>> want to
>> +# understand what is going on. On the other hand, if this tag is set to NO, 
>> the
>> +# size of the Perl module output will be much smaller and Perl will parse it
>> +# just the same.
>> +# The default value is: YES.
>> +# This tag requires that the tag GENERATE_PERLMOD is set to YES.
>> +
>> +PERLMOD_PRETTY         = YES
>> +
>> +# The names of the make variables in the generated doxyrules.make file are
>> +# prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. This is 
>> useful
>> +# so different doxyrules.make files included by the same Makefile don't
>> +# overwrite each other's variables.
>> +# This tag requires that the tag GENERATE_PERLMOD is set to YES.
>> +
>> +PERLMOD_MAKEVAR_PREFIX =
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the preprocessor
>> +#---------------------------------------------------------------------------
>> +
>> +# If the ENABLE_PREPROCESSING tag is set to YES, doxygen will evaluate all
>> +# C-preprocessor directives found in the sources and include files.
>> +# The default value is: YES.
>> +
>> +ENABLE_PREPROCESSING   = YES
>> +
>> +# If the MACRO_EXPANSION tag is set to YES, doxygen will expand all macro 
>> names
>> +# in the source code. If set to NO, only conditional compilation will be
>> +# performed. Macro expansion can be done in a controlled way by setting
>> +# EXPAND_ONLY_PREDEF to YES.
>> +# The default value is: NO.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +MACRO_EXPANSION        = YES
>> +
>> +# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
>> then
>> +# the macro expansion is limited to the macros specified with the 
>> PREDEFINED and
>> +# EXPAND_AS_DEFINED tags.
>> +# The default value is: NO.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +EXPAND_ONLY_PREDEF     = NO
>> +
>> +# If the SEARCH_INCLUDES tag is set to YES, the include files in the
>> +# INCLUDE_PATH will be searched if a #include is found.
>> +# The default value is: YES.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +SEARCH_INCLUDES        = YES
>> +
>> +# The INCLUDE_PATH tag can be used to specify one or more directories that
>> +# contain include files that are not input files but should be processed by 
>> the
>> +# preprocessor.
>> +# This tag requires that the tag SEARCH_INCLUDES is set to YES.
>> +
>> +INCLUDE_PATH           = "@XEN_BASE@/xen/include/generated" \
>> +                         "@XEN_BASE@/xen/include/"
>> +
>> +# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
>> +# patterns (like *.h and *.hpp) to filter out the header-files in the
>> +# directories. If left blank, the patterns specified with FILE_PATTERNS 
>> will be
>> +# used.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +INCLUDE_FILE_PATTERNS  =
>> +
>> +# The PREDEFINED tag can be used to specify one or more macro names that are
>> +# defined before the preprocessor is started (similar to the -D option of 
>> e.g.
>> +# gcc). The argument of the tag is a list of macros of the form: name or
>> +# name=definition (no spaces). If the definition and the "=" are omitted, 
>> "=1"
>> +# is assumed. To prevent a macro definition from being undefined via #undef 
>> or
>> +# recursively expanded use the := operator instead of the = operator.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +PREDEFINED             = __attribute__(x)= \
>> +                         DOXYGEN \
>> +                         __XEN__
>> +
>> +# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
>> this
>> +# tag can be used to specify a list of macro names that should be expanded. 
>> The
>> +# macro definition that is found in the sources will be used. Use the 
>> PREDEFINED
>> +# tag if you want to use a different macro definition that overrules the
>> +# definition found in the source code.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +EXPAND_AS_DEFINED      =
>> +
>> +# If the SKIP_FUNCTION_MACROS tag is set to YES then doxygen's preprocessor 
>> will
>> +# remove all references to function-like macros that are alone on a line, 
>> have
>> +# an all uppercase name, and do not end with a semicolon. Such function 
>> macros
>> +# are typically used for boiler-plate code, and will confuse the parser if 
>> not
>> +# removed.
>> +# The default value is: YES.
>> +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
>> +
>> +SKIP_FUNCTION_MACROS   = NO
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to external references
>> +#---------------------------------------------------------------------------
>> +
>> +# The TAGFILES tag can be used to specify one or more tag files. For each 
>> tag
>> +# file the location of the external documentation should be added. The 
>> format of
>> +# a tag file without this location is as follows:
>> +# TAGFILES = file1 file2 ...
>> +# Adding location for the tag files is done as follows:
>> +# TAGFILES = file1=loc1 "file2 = loc2" ...
>> +# where loc1 and loc2 can be relative or absolute paths or URLs. See the
>> +# section "Linking to external documentation" for more information about 
>> the use
>> +# of tag files.
>> +# Note: Each tag file must have a unique name (where the name does NOT 
>> include
>> +# the path). If a tag file is not located in the directory in which doxygen 
>> is
>> +# run, you must also specify the path to the tagfile here.
>> +
>> +TAGFILES               =
>> +
>> +# When a file name is specified after GENERATE_TAGFILE, doxygen will create 
>> a
>> +# tag file that is based on the input files it reads. See section "Linking 
>> to
>> +# external documentation" for more information about the usage of tag files.
>> +
>> +GENERATE_TAGFILE       =
>> +
>> +# If the ALLEXTERNALS tag is set to YES, all external class will be listed 
>> in
>> +# the class index. If set to NO, only the inherited external classes will be
>> +# listed.
>> +# The default value is: NO.
>> +
>> +ALLEXTERNALS           = NO
>> +
>> +# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be 
>> listed
>> +# in the modules index. If set to NO, only the current project's groups 
>> will be
>> +# listed.
>> +# The default value is: YES.
>> +
>> +EXTERNAL_GROUPS        = YES
>> +
>> +# If the EXTERNAL_PAGES tag is set to YES, all external pages will be 
>> listed in
>> +# the related pages index. If set to NO, only the current project's pages 
>> will
>> +# be listed.
>> +# The default value is: YES.
>> +
>> +EXTERNAL_PAGES         = YES
>> +
>> +#---------------------------------------------------------------------------
>> +# Configuration options related to the dot tool
>> +#---------------------------------------------------------------------------
>> +
>> +# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class 
>> diagram
>> +# (in HTML and LaTeX) for classes with base or super classes. Setting the 
>> tag to
>> +# NO turns the diagrams off. Note that this option also works with HAVE_DOT
>> +# disabled, but it is recommended to install and use dot, since it yields 
>> more
>> +# powerful graphs.
>> +# The default value is: YES.
>> +
>> +CLASS_DIAGRAMS         = NO
>> +
>> +# You can include diagrams made with dia in doxygen documentation. Doxygen 
>> will
>> +# then run dia to produce the diagram and insert it in the documentation. 
>> The
>> +# DIA_PATH tag allows you to specify the directory where the dia binary 
>> resides.
>> +# If left empty dia is assumed to be found in the default search path.
>> +
>> +DIA_PATH               =
>> +
>> +# If set to YES the inheritance and collaboration graphs will hide 
>> inheritance
>> +# and usage relations if the target is undocumented or is not a class.
>> +# The default value is: YES.
>> +
>> +HIDE_UNDOC_RELATIONS   = YES
>> +
>> +# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool 
>> is
>> +# available from the path. This tool is part of Graphviz (see:
>> +# http://www.graphviz.org/), a graph visualization toolkit from AT&T and 
>> Lucent
>> +# Bell Labs. The other options in this section have no effect if this 
>> option is
>> +# set to NO
>> +# The default value is: NO.
>> +
>> +HAVE_DOT               = NO
>> +
>> +# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is 
>> allowed
>> +# to run in parallel. When set to 0 doxygen will base this on the number of
>> +# processors available in the system. You can set it explicitly to a value
>> +# larger than 0 to get control over the balance between CPU load and 
>> processing
>> +# speed.
>> +# Minimum value: 0, maximum value: 32, default value: 0.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_NUM_THREADS        = 0
>> +
>> +# When you want a differently looking font in the dot files that doxygen
>> +# generates you can specify the font name using DOT_FONTNAME. You need to 
>> make
>> +# sure dot is able to find the font, which can be done by putting it in a
>> +# standard location or by setting the DOTFONTPATH environment variable or by
>> +# setting DOT_FONTPATH to the directory containing the font.
>> +# The default value is: Helvetica.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_FONTNAME           = Helvetica
>> +
>> +# The DOT_FONTSIZE tag can be used to set the size (in points) of the font 
>> of
>> +# dot graphs.
>> +# Minimum value: 4, maximum value: 24, default value: 10.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_FONTSIZE           = 10
>> +
>> +# By default doxygen will tell dot to use the default font as specified with
>> +# DOT_FONTNAME. If you specify a different font using DOT_FONTNAME you can 
>> set
>> +# the path where dot can find it using this tag.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_FONTPATH           =
>> +
>> +# If the CLASS_GRAPH tag is set to YES then doxygen will generate a graph 
>> for
>> +# each documented class showing the direct and indirect inheritance 
>> relations.
>> +# Setting this tag to YES will force the CLASS_DIAGRAMS tag to NO.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +CLASS_GRAPH            = YES
>> +
>> +# If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a
>> +# graph for each documented class showing the direct and indirect 
>> implementation
>> +# dependencies (inheritance, containment, and class references variables) 
>> of the
>> +# class with other documented classes.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +COLLABORATION_GRAPH    = YES
>> +
>> +# If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph 
>> for
>> +# groups, showing the direct groups dependencies.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +GROUP_GRAPHS           = YES
>> +
>> +# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
>> +# collaboration diagrams in a style similar to the OMG's Unified Modeling
>> +# Language.
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +UML_LOOK               = NO
>> +
>> +# If the UML_LOOK tag is enabled, the fields and methods are shown inside 
>> the
>> +# class node. If there are many fields or methods and many nodes the graph 
>> may
>> +# become too big to be useful. The UML_LIMIT_NUM_FIELDS threshold limits the
>> +# number of items for each type to make the size more manageable. Set this 
>> to 0
>> +# for no limit. Note that the threshold may be exceeded by 50% before the 
>> limit
>> +# is enforced. So when you set the threshold to 10, up to 15 fields may 
>> appear,
>> +# but if the number exceeds 15, the total amount of fields shown is limited 
>> to
>> +# 10.
>> +# Minimum value: 0, maximum value: 100, default value: 10.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +UML_LIMIT_NUM_FIELDS   = 10
>> +
>> +# If the TEMPLATE_RELATIONS tag is set to YES then the inheritance and
>> +# collaboration graphs will show the relations between templates and their
>> +# instances.
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +TEMPLATE_RELATIONS     = NO
>> +
>> +# If the INCLUDE_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are 
>> set to
>> +# YES then doxygen will generate a graph for each documented file showing 
>> the
>> +# direct and indirect include dependencies of the file with other documented
>> +# files.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +INCLUDE_GRAPH          = YES
>> +
>> +# If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags 
>> are
>> +# set to YES then doxygen will generate a graph for each documented file 
>> showing
>> +# the direct and indirect include dependencies of the file with other 
>> documented
>> +# files.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +INCLUDED_BY_GRAPH      = YES
>> +
>> +# If the CALL_GRAPH tag is set to YES then doxygen will generate a call
>> +# dependency graph for every global function or class method.
>> +#
>> +# Note that enabling this option will significantly increase the time of a 
>> run.
>> +# So in most cases it will be better to enable call graphs for selected
>> +# functions only using the \callgraph command. Disabling a call graph can be
>> +# accomplished by means of the command \hidecallgraph.
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +CALL_GRAPH             = NO
>> +
>> +# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
>> +# dependency graph for every global function or class method.
>> +#
>> +# Note that enabling this option will significantly increase the time of a 
>> run.
>> +# So in most cases it will be better to enable caller graphs for selected
>> +# functions only using the \callergraph command. Disabling a caller graph 
>> can be
>> +# accomplished by means of the command \hidecallergraph.
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +CALLER_GRAPH           = NO
>> +
>> +# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
>> +# hierarchy of all classes instead of a textual one.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +GRAPHICAL_HIERARCHY    = YES
>> +
>> +# If the DIRECTORY_GRAPH tag is set to YES then doxygen will show the
>> +# dependencies a directory has on other directories in a graphical way. The
>> +# dependency relations are determined by the #include relations between the
>> +# files in the directories.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DIRECTORY_GRAPH        = YES
>> +
>> +# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
>> +# generated by dot. For an explanation of the image formats see the section
>> +# output formats in the documentation of the dot tool (Graphviz (see:
>> +# http://www.graphviz.org/)).
>> +# Note: If you choose svg you need to set HTML_FILE_EXTENSION to xhtml in 
>> order
>> +# to make the SVG files visible in IE 9+ (other browsers do not have this
>> +# requirement).
>> +# Possible values are: png, jpg, gif, svg, png:gd, png:gd:gd, png:cairo,
>> +# png:cairo:gd, png:cairo:cairo, png:cairo:gdiplus, png:gdiplus and
>> +# png:gdiplus:gdiplus.
>> +# The default value is: png.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_IMAGE_FORMAT       = png
>> +
>> +# If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to
>> +# enable generation of interactive SVG images that allow zooming and 
>> panning.
>> +#
>> +# Note that this requires a modern browser other than Internet Explorer. 
>> Tested
>> +# and working are Firefox, Chrome, Safari, and Opera.
>> +# Note: For IE 9+ you need to set HTML_FILE_EXTENSION to xhtml in order to 
>> make
>> +# the SVG files visible. Older versions of IE do not have SVG support.
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +INTERACTIVE_SVG        = NO
>> +
>> +# The DOT_PATH tag can be used to specify the path where the dot tool can be
>> +# found. If left blank, it is assumed the dot tool can be found in the path.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_PATH               =
>> +
>> +# The DOTFILE_DIRS tag can be used to specify one or more directories that
>> +# contain dot files that are included in the documentation (see the \dotfile
>> +# command).
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOTFILE_DIRS           =
>> +
>> +# The MSCFILE_DIRS tag can be used to specify one or more directories that
>> +# contain msc files that are included in the documentation (see the \mscfile
>> +# command).
>> +
>> +MSCFILE_DIRS           =
>> +
>> +# The DIAFILE_DIRS tag can be used to specify one or more directories that
>> +# contain dia files that are included in the documentation (see the \diafile
>> +# command).
>> +
>> +DIAFILE_DIRS           =
>> +
>> +# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of nodes
>> +# that will be shown in the graph. If the number of nodes in a graph becomes
>> +# larger than this value, doxygen will truncate the graph, which is 
>> visualized
>> +# by representing a node as a red box. Note that doxygen if the number of 
>> direct
>> +# children of the root node in a graph is already larger than
>> +# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note 
>> that
>> +# the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
>> +# Minimum value: 0, maximum value: 10000, default value: 50.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_GRAPH_MAX_NODES    = 50
>> +
>> +# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the 
>> graphs
>> +# generated by dot. A depth value of 3 means that only nodes reachable from 
>> the
>> +# root by following a path via at most 3 edges will be shown. Nodes that lay
>> +# further from the root node will be omitted. Note that setting this option 
>> to 1
>> +# or 2 may greatly reduce the computation time needed for large code bases. 
>> Also
>> +# note that the size of a graph can be further restricted by
>> +# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
>> +# Minimum value: 0, maximum value: 1000, default value: 0.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +MAX_DOT_GRAPH_DEPTH    = 0
>> +
>> +# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent
>> +# background. This is disabled by default, because dot on Windows does not 
>> seem
>> +# to support this out of the box.
>> +#
>> +# Warning: Depending on the platform used, enabling this option may lead to
>> +# badly anti-aliased labels on the edges of a graph (i.e. they become hard 
>> to
>> +# read).
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_TRANSPARENT        = NO
>> +
>> +# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple 
>> output
>> +# files in one run (i.e. multiple -o and -T options on the command line). 
>> This
>> +# makes dot run faster, but since only newer versions of dot (>1.8.10) 
>> support
>> +# this, this feature is disabled by default.
>> +# The default value is: NO.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_MULTI_TARGETS      = NO
>> +
>> +# If the GENERATE_LEGEND tag is set to YES doxygen will generate a legend 
>> page
>> +# explaining the meaning of the various boxes and arrows in the dot 
>> generated
>> +# graphs.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +GENERATE_LEGEND        = YES
>> +
>> +# If the DOT_CLEANUP tag is set to YES, doxygen will remove the 
>> intermediate dot
>> +# files that are used to generate the various graphs.
>> +# The default value is: YES.
>> +# This tag requires that the tag HAVE_DOT is set to YES.
>> +
>> +DOT_CLEANUP            = YES
>> diff --git a/m4/ax_python_module.m4 b/m4/ax_python_module.m4
>> new file mode 100644
>> index 0000000000..107d88264a
>> --- /dev/null
>> +++ b/m4/ax_python_module.m4
>> @@ -0,0 +1,56 @@
>> +# 
>> ===========================================================================
>> +#     https://www.gnu.org/software/autoconf-archive/ax_python_module.html
>> +# 
>> ===========================================================================
>> +#
>> +# SYNOPSIS
>> +#
>> +#   AX_PYTHON_MODULE(modname[, fatal, python])
>> +#
>> +# DESCRIPTION
>> +#
>> +#   Checks for Python module.
>> +#
>> +#   If fatal is non-empty then absence of a module will trigger an error.
>> +#   The third parameter can either be "python" for Python 2 or "python3" for
>> +#   Python 3; defaults to Python 3.
>> +#
>> +# LICENSE
>> +#
>> +#   Copyright (c) 2008 Andrew Collier
>> +#
>> +#   Copying and distribution of this file, with or without modification, are
>> +#   permitted in any medium without royalty provided the copyright notice
>> +#   and this notice are preserved. This file is offered as-is, without any
>> +#   warranty.
>> +
>> +#serial 9
>> +
>> +AU_ALIAS([AC_PYTHON_MODULE], [AX_PYTHON_MODULE])
>> +AC_DEFUN([AX_PYTHON_MODULE],[
>> +    if test -z $PYTHON;
>> +    then
>> +        if test -z "$3";
>> +        then
>> +            PYTHON="python3"
>> +        else
>> +            PYTHON="$3"
>> +        fi
>> +    fi
>> +    PYTHON_NAME=`basename $PYTHON`
>> +    AC_MSG_CHECKING($PYTHON_NAME module: $1)
>> +    $PYTHON -c "import $1" 2>/dev/null
>> +    if test $? -eq 0;
>> +    then
>> +        AC_MSG_RESULT(yes)
>> +        eval AS_TR_CPP(HAVE_PYMOD_$1)=yes
>> +    else
>> +        AC_MSG_RESULT(no)
>> +        eval AS_TR_CPP(HAVE_PYMOD_$1)=no
>> +        #
>> +        if test -n "$2"
>> +        then
>> +            AC_MSG_ERROR(failed to find required module $1)
>> +            exit 1
>> +        fi
>> +    fi
>> +])
>> \ No newline at end of file
>> diff --git a/m4/docs_tool.m4 b/m4/docs_tool.m4
>> index 3e8814ac8d..39aa348026 100644
>> --- a/m4/docs_tool.m4
>> +++ b/m4/docs_tool.m4
>> @@ -15,3 +15,12 @@ dnl
>>         AC_MSG_WARN([$2 is not available so some documentation won't be 
>> built])
>>     ])
>> ])
>> +
>> +AC_DEFUN([AX_DOCS_TOOL_REQ_PROG], [
>> +dnl
>> +    AC_ARG_VAR([$1], [Path to $2 tool])
>> +    AC_PATH_PROG([$1], [$2])
>> +    AS_IF([! test -x "$ac_cv_path_$1"], [
>> +        AC_MSG_ERROR([$2 is needed])
>> +    ])
>> +])
>> \ No newline at end of file
>> -- 
>> 2.17.1




 


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