22 lines
691 B
Plaintext
22 lines
691 B
Plaintext
AC_DEFUN([AX_GCC_X86_CPUID],
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[AC_REQUIRE([AC_PROG_CC])
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AC_LANG_PUSH([C])
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AC_CACHE_CHECK(for x86 cpuid $1 output, ax_cv_gcc_x86_cpuid_$1,
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [
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int op = $1, eax, ebx, ecx, edx;
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FILE *f;
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__asm__("cpuid"
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: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
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: "a" (op));
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f = fopen("conftest_cpuid", "w"); if (!f) return 1;
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fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
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fclose(f);
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return 0;
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])],
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[ax_cv_gcc_x86_cpuid_$1=`cat conftest_cpuid`; rm -f conftest_cpuid],
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[ax_cv_gcc_x86_cpuid_$1=unknown; rm -f conftest_cpuid],
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[ax_cv_gcc_x86_cpuid_$1=unknown])])
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AC_LANG_POP([C])
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])
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