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# isnan.m4 serial 2
dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_ISNAN],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_ISNANF])
AC_REQUIRE([gl_FUNC_ISNAND])
AC_REQUIRE([gl_FUNC_ISNANL])
# If we replaced any of the underlying isnan* functions, replace
# the isnan macro; it undoubtedly suffers from the same flaws.
AC_MSG_CHECKING([whether isnan macro works])
if test $gl_func_isnanf = yes \
&& test $gl_func_isnand = yes \
&& test $gl_func_isnanl = yes; then
AC_MSG_RESULT([yes])
ISNAN_LIBM="$ISNANF_LIBM $ISNAND_LIBM $ISNANL_LIBM"
else
AC_MSG_RESULT([no])
REPLACE_ISNAN=1
# Make sure the rpl_isnan[fdl] functions get built.
gl_BUILD_ISNANF
gl_BUILD_ISNAND
gl_BUILD_ISNANL
ISNAN_LIBM=
fi
AC_SUBST([ISNAN_LIBM])
])
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