With xf86-video-intel-git13461a1 [1] I see this:
[ build-log ]
...
CC sna_cpu.lo
8 warnings generated.
CC sna_damage.lo
CC sna_display.lo
sna_cpu.c:47:2: error: implicit declaration of function '__cpuid' is
invalid in C99 [-Werror,-Wimplicit-function-declaration]
__cpuid(1, eax, ebx, ecx, edx);
^
sna_cpu.c:49:12: error: use of undeclared identifier 'bit_SSE3'
if (eax & bit_SSE3)
^
sna_cpu.c:52:12: error: use of undeclared identifier 'bit_SSSE3'
if (eax & bit_SSSE3)
^
sna_cpu.c:55:12: error: use of undeclared identifier 'bit_SSE4_1'
if (eax & bit_SSE4_1)
^
sna_cpu.c:58:12: error: use of undeclared identifier 'bit_SSE4_2'
if (eax & bit_SSE4_2)
^
sna_cpu.c:61:12: error: use of undeclared identifier 'bit_AVX'
if (eax & bit_AVX)
^
sna_cpu.c:64:12: error: use of undeclared identifier 'bit_MMX'
if (edx & bit_MMX)
^
sna_cpu.c:67:12: error: use of undeclared identifier 'bit_SSE'
if (edx & bit_SSE)
^
sna_cpu.c:70:12: error: use of undeclared identifier 'bit_SSE2'
if (edx & bit_SSE2)
^
sna_cpu.c:73:12: error: use of undeclared identifier 'bit_SSE4a'
if (edx & bit_SSE4a)
^
10 errors generated.
make[4]: *** [sna_cpu.lo] Error 1
make[4]: *** Waiting for unfinished jobs....
I checked for installed cpuid.h files, can't say if you this requires
the one from kernel or compiler sources.
In my running Linux-Next (next-20130226) kernel I have no "cpuid.h" header-file.
Checking the compiler side:
[ /usr/lib/gcc/x86_64-linux-gnu/4.6/include/cpuid.h ]
...
#if __GNUC__ >= 3
#define __cpuid(level, a, b, c, d) \
__asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
"cpuid\n\t" \
"xchg{l}\t{%%}ebx, %1\n\t" \
: "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
: "0" (level))
...
#endif
...
[ /opt/llvm/lib/clang/3.2/include/cpuid.h ]
...
static inline int __get_cpuid (unsigned int level, unsigned int *eax,
unsigned int *ebx, unsigned int *ecx,
unsigned int *edx) {
__asm("cpuid" : "=a"(*eax), "=b" (*ebx), "=c"(*ecx), "=d"(*edx) :
"0"(level));
return 1;
}
...
So, clang should be treated differently?
Regards,
- Sedat -
[1] http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/src/sna/sna_cpu.c?id=13461a18b1605feb17304d52136d100df50ca296
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