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llvm-mirror/autoconf/m4/huge_val.m4
NAKAMURA Takumi 2d109660d7 [autoconf] Fix m4 quoting for newer autotools
This simply fixes up quoting of macro invocations to appease newer versions of autotools.

http://llvm-reviews.chandlerc.com/D332

Signed-off-by: Saleem Abdulrasool <compnerd@compnerd.org>
llvm-svn: 173878
2013-01-30 01:37:55 +00:00

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#
# This function determins if the HUGE_VAL macro is compilable with the
# -pedantic switch or not. XCode < 2.4.1 doesn't get it right.
#
AC_DEFUN([AC_HUGE_VAL_CHECK],[
AC_CACHE_CHECK([for HUGE_VAL sanity], [ac_cv_huge_val_sanity],[
AC_LANG_PUSH([C++])
ac_save_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS -pedantic"
AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]],
[[double x = HUGE_VAL; return x != x;]])],
[ac_cv_huge_val_sanity=yes],[ac_cv_huge_val_sanity=no],
[ac_cv_huge_val_sanity=yes])
CXXFLAGS=$ac_save_CXXFLAGS
AC_LANG_POP([C++])
])
AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity)
])