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=$CXXFLAGS
CXXFLAGS=-pedantic
AC_RUN_IFELSE(
AC_LANG_PROGRAM(
[double x = HUGE_VAL; return x != x; ]),
[ac_cv_huge_val_sanity=yes],[ac_cv_huge_val_sanity=no],
[ac_cv_huge_val_sanity=yes])
+ CXXFLAGS=$ac_save_CXXFLAGS
AC_LANG_POP([C++])
])
AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity)
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+ ac_save_CXXFLAGS=$CXXFLAGS
CXXFLAGS=-pedantic
if test "$cross_compiling" = yes; then
ac_cv_huge_val_sanity=yes
fi
+ CXXFLAGS=$ac_save_CXXFLAGS
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'