| From | danielfsantos@att ... | Subject | [PATCH v3 02/10] compiler-gcc.h: Add gcc-recommended GCC_VERSION macro | Date | Wed, 24 Oct 2012 11:33:53 -0500 |
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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@pobox.com> Acked-by: Borislav Petkov <bp@alien8.de> Acked-by: David Rientjes <rientjes@google.com> --- include/linux/compiler-gcc.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 6a6d7ae..24545cd 100644 --- a/include/linux/compiler-gcc.h +++ b/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 */ -- 1.7.3.4
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