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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-07-11 12:39:01 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-07-11 13:24:58 +0100 |
| commit | 545fe0fe04635e62216f452f659a5a40469d3190 (patch) | |
| tree | 7d679fb266196884d3cb4807636b974992ef4ac0 /configure.ac | |
| parent | 2038b2470d83fc13e238dd884ee1b5676dd04385 (diff) | |
lib; Add x86 cpuid based feature detection
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index c852d55d..f05bcb0e 100644 --- a/configure.ac +++ b/configure.ac @@ -80,6 +80,25 @@ AC_CHECK_FUNCS(timer_create, [], [ ]) AC_SUBST(TIMER_LIBS) +dnl Check for CPUID +cpuid="yes" +AC_TRY_LINK([ + #include <cpuid.h> + #include <stddef.h> + ], + [ + int eax, ebx, ecx, edx; + if (__get_cpuid_max(0, NULL) < 4) + return 0; + __cpuid_count(4, 0, eax, ebx, ecx, edx); + ], + [cpuid="yes"], + [cpuid="no"] +) +if test "x$cpuid" = "xyes"; then + AC_DEFINE(HAVE_CPUID_H, 1, [Found a useable cpuid.h]) +fi + # Initialize libtool AC_DISABLE_STATIC AC_PROG_LIBTOOL |