Author: pfg Date: Fri Apr 24 18:07:34 2015 New Revision: 281945 URL: https://svnweb.freebsd.org/changeset/base/281945
Log: Add definition to support alloc_align attribute. gcc 4.9 added support for new alignment attribute alloc_align: The alloc_align attribute is used to tell the compiler that the function return value points to memory, where the returned pointer minimum alignment is given by one of the functions parameters. GCC uses this information to improve pointer alignment analysis. This attribute is not (yet) available on clang. Modified: head/sys/sys/cdefs.h Modified: head/sys/sys/cdefs.h ============================================================================== --- head/sys/sys/cdefs.h Fri Apr 24 17:36:26 2015 (r281944) +++ head/sys/sys/cdefs.h Fri Apr 24 18:07:34 2015 (r281945) @@ -395,6 +395,12 @@ #define __alloc_size(x) #endif +#if __has_attribute(alloc_align) || __GNUC_PREREQ__(4, 9) +#define __alloc_align(x) __attribute__((__alloc_align__(x))) +#else +#define __alloc_align(x) +#endif + /* XXX: should use `#if __STDC_VERSION__ < 199901'. */ #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) #define __func__ NULL _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
