This patch adds the alias bit_FXSAVE for bit_FXSR to cpuid.h. Introduced here: http://svnweb.freebsd.org/changeset/base/259498 Index: tools/clang/lib/Headers/cpuid.h =================================================================== --- tools/clang/lib/Headers/cpuid.h +++ tools/clang/lib/Headers/cpuid.h @@ -79,6 +79,7 @@ #define bit_ACPI 0x00400000 #define bit_MMX 0x00800000 #define bit_FXSR 0x01000000 +#define bit_FXSAVE bit_FXSR /* for gcc compat */ #define bit_SSE 0x02000000 #define bit_SSE2 0x04000000 #define bit_SS 0x08000000