[Xen-changelog] [xen master] xen/compat: support XEN_HAVE_FOO ifdefs in public interface

[patchbot@xxxxxxx]

commit 623038e4df4f09946e6126e5744a3a2e28add28f
Author:     Ian Campbell <ian.campbell@xxxxxxxxxx>
AuthorDate: Fri Jul 19 12:51:07 2013 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Tue Aug 20 15:40:36 2013 +0100

    xen/compat: support XEN_HAVE_FOO ifdefs in public interface
    
    This allows us expose or hide interface features on different architectures
    without requiring nasty arch-specific ifdeffery.
    
    Preserves any #ifdef with a XEN_HAVE_* symbol name, as well as any #else or
    
    The ifdef symbol becomes COMPAT_HAVE in the compat versions so that
    architectures can enable or disable interfaces for compat mode too. (This
    actually just fell out of the way the existing stuff works and it didn't 
seem
    worth jumping through hoops to make the name remain XEN_HAVE).
    
    Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Acked-by: Keir Fraser <keir@xxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 xen/tools/compat-build-header.py |    3 +++
 xen/tools/compat-build-source.py |    3 +++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/xen/tools/compat-build-header.py b/xen/tools/compat-build-header.py
index fba2f37..e296062 100755
--- a/xen/tools/compat-build-header.py
+++ b/xen/tools/compat-build-header.py
@@ -4,6 +4,9 @@ import re,sys
 
 pats = [
  [ r"__InClUdE__(.*)", r"#include\1\n#pragma pack(4)" ],
+ [ r"__IfDeF__ (XEN_HAVE.*)", r"#ifdef \1" ],
+ [ r"__ElSe__", r"#else" ],
+ [ r"__EnDif__", r"#endif" ],
  [ r"\"xen-compat.h\"", r"<public/xen-compat.h>" ],
  [ r"(struct|union|enum)\s+(xen_?)?(\w)", r"\1 compat_\3" ],
  [ r"@KeeP@", r"" ],
diff --git a/xen/tools/compat-build-source.py b/xen/tools/compat-build-source.py
index 3906b71..55206e6 100755
--- a/xen/tools/compat-build-source.py
+++ b/xen/tools/compat-build-source.py
@@ -4,6 +4,9 @@ import re,sys
 
 pats = [
  [ r"^\s*#\s*include\s+", r"__InClUdE__ " ],
+ [ r"^\s*#\s*ifdef (XEN_HAVE.*)\s+", r"__IfDeF__ \1" ],
+ [ r"^\s*#\s*else /\* (XEN_HAVE.*) \*/\s+", r"__ElSe__" ],
+ [ r"^\s*#\s*endif /\* (XEN_HAVE.*) \*/\s+", r"__EnDif__" ],
  [ r"^\s*#\s*define\s+([A-Z_]*_GUEST_HANDLE)", r"#define HIDE_\1" ],
  [ r"^\s*#\s*define\s+([a-z_]*_guest_handle)", r"#define hide_\1" ],
  [ r"XEN_GUEST_HANDLE(_[0-9A-Fa-f]+)?", r"COMPAT_HANDLE" ],
--
generated by git-patchbot for /home/xen/git/xen.git#master

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