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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH VTPM v8 8/8] Add conditional build of subsystems to configure.ac
The toplevel Makefile still works without running configure
and will default build everything
Signed-off-by: Matthew Fioravante <matthew.fioravante@xxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
Makefile | 10 +-
config/Toplevel.mk.in | 1 +
configure | 576 ++++++++++++++++++++++++++++++++++++++++++++++++-
configure.ac | 11 +-
m4/subsystem.m4 | 32 +++
5 files changed, 625 insertions(+), 5 deletions(-)
create mode 100644 config/Toplevel.mk.in
create mode 100644 m4/subsystem.m4
diff --git a/Makefile b/Makefile
index a6ed8be..aa3c7bd 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,11 @@
.PHONY: all
all: dist
+-include config/Toplevel.mk
+SUBSYSTEMS?=xen kernels tools stubdom docs
+TARGS_DIST=$(patsubst %, dist-%, $(SUBSYSTEMS))
+TARGS_INSTALL=$(patsubst %, install-%, $(SUBSYSTEMS))
+
export XEN_ROOT=$(CURDIR)
include Config.mk
@@ -15,7 +20,7 @@ include buildconfigs/Rules.mk
# build and install everything into the standard system directories
.PHONY: install
-install: install-xen install-kernels install-tools install-stubdom install-docs
+install: $(TARGS_INSTALL)
.PHONY: build
build: kernels
@@ -37,7 +42,7 @@ test:
# build and install everything into local dist directory
.PHONY: dist
dist: DESTDIR=$(DISTDIR)/install
-dist: dist-xen dist-kernels dist-tools dist-stubdom dist-docs dist-misc
+dist: $(TARGS_DIST) dist-misc
dist-misc:
$(INSTALL_DIR) $(DISTDIR)/
@@ -151,6 +156,7 @@ endif
# clean, but blow away kernel build tree plus tarballs
.PHONY: distclean
distclean:
+ -rm config/Toplevel.mk
$(MAKE) -C xen distclean
$(MAKE) -C tools distclean
$(MAKE) -C stubdom distclean
diff --git a/config/Toplevel.mk.in b/config/Toplevel.mk.in
new file mode 100644
index 0000000..4db7eaf
--- /dev/null
+++ b/config/Toplevel.mk.in
@@ -0,0 +1 @@
+SUBSYSTEMS := @SUBSYSTEMS@
diff --git a/configure b/configure
index 3cbeea0..2c1f5bc 100755
--- a/configure
+++ b/configure
@@ -561,6 +561,12 @@ ac_default_prefix=/usr
enable_option_checking=no
ac_subst_vars='LTLIBOBJS
LIBOBJS
+SUBSYSTEMS
+docs
+stubdom
+tools
+kernels
+xen
subdirs
target_alias
host_alias
@@ -603,11 +609,20 @@ SHELL'
ac_subst_files=''
ac_user_opts='
enable_option_checking
+enable_xen
+enable_kernels
+enable_tools
+enable_stubdom
+enable_docs
'
ac_precious_vars='build_alias
host_alias
target_alias'
-ac_subdirs_all='tools stubdom'
+ac_subdirs_all='xen
+kernels
+tools
+stubdom
+docs'
# Initialize some variables set by options.
ac_init_help=
@@ -1214,6 +1229,16 @@ if test -n "$ac_init_help"; then
esac
cat <<\_ACEOF
+Optional Features:
+ --disable-option-checking ignore unrecognized --enable/--with options
+ --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
+ --enable-FEATURE[=ARG] include FEATURE [ARG=yes]
+ --disable-xen Disable build and install of xen
+ --disable-kernels Disable build and install of kernels
+ --disable-tools Disable build and install of tools
+ --disable-stubdom Disable build and install of stubdom
+ --disable-docs Disable build and install of docs
+
Report bugs to <xen-devel@xxxxxxxxxxxxx>.
Xen Hypervisor home page: <http://www.xen.org/>.
_ACEOF
@@ -1645,6 +1670,22 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
+ac_config_files="$ac_config_files ./config/Toplevel.mk"
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
ac_aux_dir=
for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
@@ -1677,7 +1718,113 @@ ac_configure="$SHELL $ac_aux_dir/configure" # Please
don't use this var.
-subdirs="$subdirs tools stubdom"
+
+# Check whether --enable-xen was given.
+if test "${enable_xen+set}" = set; then :
+ enableval=$enable_xen;
+xen=n
+
+else
+
+xen=y
+SUBSYSTEMS="$SUBSYSTEMS xen"
+if test -e "xen/configure"; then :
+
+subdirs="$subdirs xen"
+
+
+fi
+
+fi
+
+
+
+
+# Check whether --enable-kernels was given.
+if test "${enable_kernels+set}" = set; then :
+ enableval=$enable_kernels;
+kernels=n
+
+else
+
+kernels=y
+SUBSYSTEMS="$SUBSYSTEMS kernels"
+if test -e "kernels/configure"; then :
+
+subdirs="$subdirs kernels"
+
+
+fi
+
+fi
+
+
+
+
+# Check whether --enable-tools was given.
+if test "${enable_tools+set}" = set; then :
+ enableval=$enable_tools;
+tools=n
+
+else
+
+tools=y
+SUBSYSTEMS="$SUBSYSTEMS tools"
+if test -e "tools/configure"; then :
+
+subdirs="$subdirs tools"
+
+
+fi
+
+fi
+
+
+
+
+# Check whether --enable-stubdom was given.
+if test "${enable_stubdom+set}" = set; then :
+ enableval=$enable_stubdom;
+stubdom=n
+
+else
+
+stubdom=y
+SUBSYSTEMS="$SUBSYSTEMS stubdom"
+if test -e "stubdom/configure"; then :
+
+subdirs="$subdirs stubdom"
+
+
+fi
+
+fi
+
+
+
+
+# Check whether --enable-docs was given.
+if test "${enable_docs+set}" = set; then :
+ enableval=$enable_docs;
+docs=n
+
+else
+
+docs=y
+SUBSYSTEMS="$SUBSYSTEMS docs"
+if test -e "docs/configure"; then :
+
+subdirs="$subdirs docs"
+
+
+fi
+
+fi
+
+
+
+
+
cat >confcache <<\_ACEOF
@@ -2236,11 +2383,15 @@ on `(hostname || uname -n) 2>/dev/null | sed 1q`
_ACEOF
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
# Files that config.status was made for.
+config_files="$ac_config_files"
_ACEOF
@@ -2259,6 +2410,11 @@ Usage: $0 [OPTION]... [TAG]...
do not print progress messages
-d, --debug don't remove temporary files
--recheck update $as_me by reconfiguring in the same conditions
+ --file=FILE[:TEMPLATE]
+ instantiate the configuration file FILE
+
+Configuration files:
+$config_files
Report bugs to <xen-devel@xxxxxxxxxxxxx>.
Xen Hypervisor home page: <http://www.xen.org/>."
@@ -2313,6 +2469,14 @@ do
$as_echo "$ac_cs_config"; exit ;;
--debug | --debu | --deb | --de | --d | -d )
debug=: ;;
+ --file | --fil | --fi | --f )
+ $ac_shift
+ case $ac_optarg in
+ *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+ '') as_fn_error $? "missing file argument" ;;
+ esac
+ as_fn_append CONFIG_FILES " '$ac_optarg'"
+ ac_need_defaults=false;;
--he | --h | --help | --hel | -h )
$as_echo "$ac_cs_usage"; exit ;;
-q | -quiet | --quiet | --quie | --qui | --qu | --q \
@@ -2369,12 +2533,420 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
for ac_config_target in $ac_config_targets
do
case $ac_config_target in
+ "./config/Toplevel.mk") CONFIG_FILES="$CONFIG_FILES ./config/Toplevel.mk"
;;
*) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5 ;;
esac
done
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used. Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+ test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+fi
+
+# Have a temporary directory for convenience. Make it in the build tree
+# simply because there is no reason against having it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Hook for its removal unless debugging.
+# Note that there is a small window in which the directory will not be cleaned:
+# after its creation but before its name has been assigned to `$tmp'.
+$debug ||
+{
+ tmp=
+ trap 'exit_status=$?
+ { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status
+' 0
+ trap 'as_fn_exit 1' 1 2 13 15
+}
+# Create a (secure) tmp directory for tmp files.
+
+{
+ tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
+ test -n "$tmp" && test -d "$tmp"
+} ||
+{
+ tmp=./conf$$-$RANDOM
+ (umask 077 && mkdir "$tmp")
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+
+# Set up the scripts for CONFIG_FILES section.
+# No need to generate them if there are no CONFIG_FILES.
+# This happens for instance with `./config.status config.h'.
+if test -n "$CONFIG_FILES"; then
+
+
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+ eval ac_cr=\$\'\\r\'
+fi
+ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
+if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
+ ac_cs_awk_cr='\\r'
+else
+ ac_cs_awk_cr=$ac_cr
+fi
+
+echo 'BEGIN {' >"$tmp/subs1.awk" &&
+_ACEOF
+
+
+{
+ echo "cat >conf$$subs.awk <<_ACEOF" &&
+ echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
+ echo "_ACEOF"
+} >conf$$subs.sh ||
+ as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+ . ./conf$$subs.sh ||
+ as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+
+ ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+ if test $ac_delim_n = $ac_delim_num; then
+ break
+ elif $ac_last_try; then
+ as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ else
+ ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+ fi
+done
+rm -f conf$$subs.sh
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"\$tmp/subs1.awk" <<\\_ACAWK &&
+_ACEOF
+sed -n '
+h
+s/^/S["/; s/!.*/"]=/
+p
+g
+s/^[^!]*!//
+:repl
+t repl
+s/'"$ac_delim"'$//
+t delim
+:nl
+h
+s/\(.\{148\}\)..*/\1/
+t more1
+s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
+p
+n
+b repl
+:more1
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t nl
+:delim
+h
+s/\(.\{148\}\)..*/\1/
+t more2
+s/["\\]/\\&/g; s/^/"/; s/$/"/
+p
+b
+:more2
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t delim
+' <conf$$subs.awk | sed '
+/^[^""]/{
+ N
+ s/\n//
+}
+' >>$CONFIG_STATUS || ac_write_fail=1
+rm -f conf$$subs.awk
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACAWK
+cat >>"\$tmp/subs1.awk" <<_ACAWK &&
+ for (key in S) S_is_set[key] = 1
+ FS = ""
+
+}
+{
+ line = $ 0
+ nfields = split(line, field, "@")
+ substed = 0
+ len = length(field[1])
+ for (i = 2; i < nfields; i++) {
+ key = field[i]
+ keylen = length(key)
+ if (S_is_set[key]) {
+ value = S[key]
+ line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
+ len += length(value) + length(field[++i])
+ substed = 1
+ } else
+ len += 1 + keylen
+ }
+
+ print line
+}
+
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
+ sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
+else
+ cat
+fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \
+ || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
+_ACEOF
+
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+ ac_vpsub='/^[ ]*VPATH[ ]*=[ ]*/{
+h
+s///
+s/^/:/
+s/[ ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
+s/:*$//
+x
+s/\(=[ ]*\).*/\1/
+G
+s/\n//
+s/^[^=]*=[ ]*$//
+}'
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+fi # test -n "$CONFIG_FILES"
+
+
+eval set X " :F $CONFIG_FILES "
+shift
+for ac_tag
+do
+ case $ac_tag in
+ :[FHLC]) ac_mode=$ac_tag; continue;;
+ esac
+ case $ac_mode$ac_tag in
+ :[FHL]*:*);;
+ :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5 ;;
+ :[FH]-) ac_tag=-:-;;
+ :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
+ esac
+ ac_save_IFS=$IFS
+ IFS=:
+ set x $ac_tag
+ IFS=$ac_save_IFS
+ shift
+ ac_file=$1
+ shift
+
+ case $ac_mode in
+ :L) ac_source=$1;;
+ :[FH])
+ ac_file_inputs=
+ for ac_f
+ do
+ case $ac_f in
+ -) ac_f="$tmp/stdin";;
+ *) # Look for the file first in the build tree, then in the source tree
+ # (if the path is not absolute). The absolute path cannot be
DOS-style,
+ # because $ac_f cannot contain `:'.
+ test -f "$ac_f" ||
+ case $ac_f in
+ [\\/$]*) false;;
+ *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
+ esac ||
+ as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5 ;;
+ esac
+ case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;;
esac
+ as_fn_append ac_file_inputs " '$ac_f'"
+ done
+
+ # Let's still pretend it is `configure' which instantiates (i.e., don't
+ # use $as_me), people would be surprised to read:
+ # /* config.h. Generated by config.status. */
+ configure_input='Generated from '`
+ $as_echo "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+ `' by configure.'
+ if test x"$ac_file" != x-; then
+ configure_input="$ac_file. $configure_input"
+ { $as_echo "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+$as_echo "$as_me: creating $ac_file" >&6;}
+ fi
+ # Neutralize special characters interpreted by sed in replacement strings.
+ case $configure_input in #(
+ *\&* | *\|* | *\\* )
+ ac_sed_conf_input=`$as_echo "$configure_input" |
+ sed 's/[\\\\&|]/\\\\&/g'`;; #(
+ *) ac_sed_conf_input=$configure_input;;
+ esac
+
+ case $ac_tag in
+ *:-:* | *:-) cat >"$tmp/stdin" \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
+ esac
+ ;;
+ esac
+
+ ac_dir=`$as_dirname -- "$ac_file" ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+ X"$ac_file" : 'X\(//\)[^/]' \| \
+ X"$ac_file" : 'X\(//\)$' \| \
+ X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$ac_file" |
+ sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)[^/].*/{
+ s//\1/
+ q
+ }
+ /^X\(\/\/\)$/{
+ s//\1/
+ q
+ }
+ /^X\(\/\).*/{
+ s//\1/
+ q
+ }
+ s/.*/./; q'`
+ as_dir="$ac_dir"; as_fn_mkdir_p
+ ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+ ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+ # A ".." for each directory in $ac_dir_suffix.
+ ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed
's|/[^\\/]*|/..|g;s|/||'`
+ case $ac_top_builddir_sub in
+ "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+ *) ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+ esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+ .) # We are building in place.
+ ac_srcdir=.
+ ac_top_srcdir=$ac_top_builddir_sub
+ ac_abs_top_srcdir=$ac_pwd ;;
+ [\\/]* | ?:[\\/]* ) # Absolute name.
+ ac_srcdir=$srcdir$ac_dir_suffix;
+ ac_top_srcdir=$srcdir
+ ac_abs_top_srcdir=$srcdir ;;
+ *) # Relative name.
+ ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+ ac_top_srcdir=$ac_top_build_prefix$srcdir
+ ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+
+ case $ac_mode in
+ :F)
+ #
+ # CONFIG_FILE
+ #
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# If the template does not know about datarootdir, expand it.
+# FIXME: This hack should be removed a few years after 2.60.
+ac_datarootdir_hack=; ac_datarootdir_seen=
+ac_sed_dataroot='
+/datarootdir/ {
+ p
+ q
+}
+/@datadir@/p
+/@docdir@/p
+/@infodir@/p
+/@localedir@/p
+/@mandir@/p'
+case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
+*datarootdir*) ac_datarootdir_seen=yes;;
+*@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to
ignore the --datarootdir setting" >&5
+$as_echo "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir
setting" >&2;}
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ ac_datarootdir_hack='
+ s&@datadir@&$datadir&g
+ s&@docdir@&$docdir&g
+ s&@infodir@&$infodir&g
+ s&@localedir@&$localedir&g
+ s&@mandir@&$mandir&g
+ s&\\\${datarootdir}&$datarootdir&g' ;;
+esac
+_ACEOF
+
+# Neutralize VPATH when `$srcdir' = `.'.
+# Shell code in configure.ac might set extrasub.
+# FIXME: do we really want to maintain this feature?
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_sed_extra="$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s|@configure_input@|$ac_sed_conf_input|;t t
+s&@top_builddir@&$ac_top_builddir_sub&;t t
+s&@top_build_prefix@&$ac_top_build_prefix&;t t
+s&@srcdir@&$ac_srcdir&;t t
+s&@abs_srcdir@&$ac_abs_srcdir&;t t
+s&@top_srcdir@&$ac_top_srcdir&;t t
+s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
+s&@builddir@&$ac_builddir&;t t
+s&@abs_builddir@&$ac_abs_builddir&;t t
+s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+$ac_datarootdir_hack
+"
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$tmp/subs.awk"
>$tmp/out \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+
+test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
+ { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
+ { ac_out=`sed -n '/^[ ]*datarootdir[ ]*:*=/p' "$tmp/out"`; test -z
"$ac_out"; } &&
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a
reference to the variable \`datarootdir'
+which seems to be undefined. Please make sure it is defined" >&5
+$as_echo "$as_me: WARNING: $ac_file contains a reference to the variable
\`datarootdir'
+which seems to be undefined. Please make sure it is defined" >&2;}
+
+ rm -f "$tmp/stdin"
+ case $ac_file in
+ -) cat "$tmp/out" && rm -f "$tmp/out";;
+ *) rm -f "$ac_file" && mv "$tmp/out" "$ac_file";;
+ esac \
+ || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ ;;
+
+
+
+ esac
+
+done # for ac_tag
+
+
as_fn_exit 0
_ACEOF
ac_clean_files=$ac_clean_files_save
diff --git a/configure.ac b/configure.ac
index 5dacb46..fcbc4ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,16 @@ AC_INIT([Xen Hypervisor], m4_esyscmd([./version.sh
./xen/Makefile]),
[xen-devel@xxxxxxxxxxxxx], [xen], [http://www.xen.org/])
AC_CONFIG_SRCDIR([./xen/common/kernel.c])
AC_PREFIX_DEFAULT([/usr])
+AC_CONFIG_FILES([./config/Toplevel.mk])
-AC_CONFIG_SUBDIRS([tools stubdom])
+m4_include([m4/features.m4])
+m4_include([m4/subsystem.m4])
+
+AX_SUBSYSTEM_DEFAULT_ENABLE([xen])
+AX_SUBSYSTEM_DEFAULT_ENABLE([kernels])
+AX_SUBSYSTEM_DEFAULT_ENABLE([tools])
+AX_SUBSYSTEM_DEFAULT_ENABLE([stubdom])
+AX_SUBSYSTEM_DEFAULT_ENABLE([docs])
+AX_SUBSYSTEM_FINISH
AC_OUTPUT()
diff --git a/m4/subsystem.m4 b/m4/subsystem.m4
new file mode 100644
index 0000000..d3eb8c9
--- /dev/null
+++ b/m4/subsystem.m4
@@ -0,0 +1,32 @@
+AC_DEFUN([AX_SUBSYSTEM_DEFAULT_ENABLE], [
+AC_ARG_ENABLE([$1],
+AS_HELP_STRING([--disable-$1], [Disable build and install of $1]),[
+$1=n
+],[
+$1=y
+SUBSYSTEMS="$SUBSYSTEMS $1"
+AS_IF([test -e "$1/configure"], [
+AC_CONFIG_SUBDIRS([$1])
+])
+])
+AC_SUBST($1)
+])
+
+AC_DEFUN([AX_SUBSYSTEM_DEFAULT_DISABLE], [
+AC_ARG_ENABLE([$1],
+AS_HELP_STRING([--enable-$1], [Enable build and install of $1]),[
+$1=y
+SUBSYSTEMS="$SUBSYSTEMS $1"
+AS_IF([test -e "$1/configure"], [
+AC_CONFIG_SUBDIRS([$1])
+])
+],[
+$1=n
+])
+AC_SUBST($1)
+])
+
+
+AC_DEFUN([AX_SUBSYSTEM_FINISH], [
+AC_SUBST(SUBSYSTEMS)
+])
--
1.7.10.4
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