The patch titled
Subject: compiler-gcc.h: Add gcc-recommended GCC_VERSION macro
has been added to the -mm tree. Its filename is
compiler-gcch-add-gcc-recommended-gcc_version-macro.patch
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From: Daniel Santos <daniel.santos@xxxxxxxxx>
Subject: compiler-gcc.h: Add gcc-recommended GCC_VERSION macro
Throughout compiler*.h, many version checks are made. These can be
simplified by using the macro that gcc's documentation recommends.
However, my primary reason for adding this is that I need bug-check macros
that are enabled at certain gcc versions and it's cleaner to use this
macro than the tradition method:
if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ => 2)
If you add patch level, it gets this ugly:
if __GNUC__ > 4 || (__GNUC__ == 4 && (__GNUC_MINOR__ > 2 || \
__GNUC_MINOR__ == 2 __GNUC_PATCHLEVEL__ >= 1))
As opposed to:
if GCC_VERSION >= 40201
While having separate headers for gcc 3 & 4 eliminates some of this
verbosity, they can still be cleaned up by this.
See also:
http://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html
Signed-off-by: Daniel Santos <daniel.santos@xxxxxxxxx>
Acked-by: Borislav Petkov <bp@xxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/compiler-gcc.h | 3 +++
1 file changed, 3 insertions(+)
diff -puN include/linux/compiler-gcc.h~compiler-gcch-add-gcc-recommended-gcc_version-macro include/linux/compiler-gcc.h
--- a/include/linux/compiler-gcc.h~compiler-gcch-add-gcc-recommended-gcc_version-macro
+++ a/include/linux/compiler-gcc.h
@@ -5,6 +5,9 @@
/*
* Common definitions for all gcc versions go here.
*/
+#define GCC_VERSION (__GNUC__ * 10000 \
+ + __GNUC_MINOR__ * 100 \
+ + __GNUC_PATCHLEVEL__)
/* Optimization barrier */
_
Patches currently in -mm which might be from daniel.santos@xxxxxxxxx are
compiler-gcc4h-reorder-macros-based-upon-gcc-ver.patch
compiler-gcch-add-gcc-recommended-gcc_version-macro.patch
compiler-gcc34h-use-gcc_version-macro.patch
compiler-gcc4h-bugh-remove-duplicate-macros.patch
bugh-fix-build_bug_on-macro-in-__checker__.patch
bugh-prevent-double-evaulation-of-in-build_bug_on.patch
bugh-make-build_bug_on-generate-compile-time-error.patch
compilerh-bugh-prevent-double-error-messages-with-build_bug_on.patch
bugh-compilerh-introduce-compiletime_assert-build_bug_on_msg.patch
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