2006-11-04 02:04:08 +08:00
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#
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2012-07-23 16:51:15 +08:00
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# This function determins if the HUGE_VAL macro is compilable with the
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2006-11-04 02:04:08 +08:00
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# -pedantic switch or not. XCode < 2.4.1 doesn't get it right.
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#
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AC_DEFUN([AC_HUGE_VAL_CHECK],[
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AC_CACHE_CHECK([for HUGE_VAL sanity], [ac_cv_huge_val_sanity],[
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2006-11-04 03:49:16 +08:00
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AC_LANG_PUSH([C++])
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2010-03-02 13:06:54 +08:00
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ac_save_CXXFLAGS=$CXXFLAGS
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2012-04-02 14:54:01 +08:00
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CXXFLAGS="$CXXFLAGS -pedantic"
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2013-01-30 09:37:55 +08:00
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AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]],
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[[double x = HUGE_VAL; return x != x;]])],
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[ac_cv_huge_val_sanity=yes],[ac_cv_huge_val_sanity=no],
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[ac_cv_huge_val_sanity=yes])
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2010-03-02 13:06:54 +08:00
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CXXFLAGS=$ac_save_CXXFLAGS
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2006-11-04 03:49:16 +08:00
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AC_LANG_POP([C++])
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2006-11-04 02:04:08 +08:00
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])
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AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity)
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])
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