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# rintl.m4 serial 4
dnl Copyright (C) 2011-2017 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_FUNC_RINTL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
dnl Persuade glibc <math.h> to declare rintl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Determine RINTL_LIBM.
gl_MATHFUNC([rintl], [long double], [(long double)])
if test $gl_cv_func_rintl_no_libm = no \
&& test $gl_cv_func_rintl_in_libm = no; then
HAVE_RINTL=0
dnl Find libraries needed to link lib/rintl.c.
if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
AC_REQUIRE([gl_FUNC_RINT])
RINTL_LIBM="$RINT_LIBM"
else
RINTL_LIBM=
fi
fi
AC_SUBST([RINTL_LIBM])
])
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