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Lines 251-259
AC_CHECK_FUNC(strncasecmp, ,
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dnl ---------------------------------------------------------------------- |
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dnl ---------------------------------------------------------------------- |
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dnl Check whether we have i386 features |
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dnl Check whether we have i386 features |
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AC_MSG_CHECKING([for Intel 386]) |
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AC_MSG_CHECKING([for Intel 386]) |
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int x; |
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int x=1; |
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asm("bsf %1,%0\njnz 0f\nmovl $32,%0\n0:":"=r"(x):"r"(x)); |
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volatile asm("bsf %1,%0\njnz 0f\nmovl $32,%0\n0:":"=r"(x):"r"(x):"memory"); |
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return x; /* need this so that -O2 does not optimize the asm away */ |
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/* volatile and "memory" clobber ensures '-O2 -flto' does not optimize the asm away */ |
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return x; |
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]])],[AC_MSG_RESULT(yes) |
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]])],[AC_MSG_RESULT(yes) |
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AC_DEFINE(HAVE_I386,, Can we use Intel 386 optimizations?) |
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AC_DEFINE(HAVE_I386,, Can we use Intel 386 optimizations?) |
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],[AC_MSG_RESULT(no)]) |
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],[AC_MSG_RESULT(no)]) |
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