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Check for cpuid instruction

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Frank Denis 2013-04-25 18:59:55 -07:00
parent f0d71f9df0
commit 5f226a23a1
1 changed files with 14 additions and 0 deletions
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14
configure.ac
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@ -180,6 +180,20 @@ uint128_t x;
AM_CONDITIONAL([HAVE_TI_MODE], [test $HAVE_TI_MODE_V = 1])
AC_SUBST(HAVE_TI_MODE_V)
AC_MSG_CHECKING(for cpuid instruction)
HAVE_CPUID_V=0
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
]], [[
__asm__("cpuid" : "=a"(*eax), "=b" (*ebx), "=c"(*ecx), "=d"(*edx)
: "0"(level));
]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_CPUID], [1], [cpuid instruction is available])
HAVE_CPUID_V=1],
[AC_MSG_RESULT(no)])
AM_CONDITIONAL([HAVE_CPUID], [test $HAVE_CPUID_V = 1])
AC_SUBST(HAVE_CPUID_V)
dnl Checks for functions and headers
AC_CHECK_FUNC(clock_gettime, , [AC_CHECK_LIB(rt, clock_gettime)])