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# roundl.m4 serial 5
dnl Copyright (C) 2007, 2009 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_ROUNDL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare roundl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_DECLS([roundl], , , [#include <math.h>])
if test "$ac_cv_have_decl_roundl" = yes; then
gl_CHECK_MATH_LIB([ROUNDL_LIBM], [x = roundl (x);])
fi
if test "$ac_cv_have_decl_roundl" != yes || test "$ROUNDL_LIBM" = missing; then
REPLACE_ROUNDL=1
AC_LIBOBJ([roundl])
AC_CHECK_DECLS([ceill, floorl], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorl" = yes \
&& test "$ac_cv_have_decl_ceill" = yes; then
gl_FUNC_FLOORL_LIBS
gl_FUNC_CEILL_LIBS
if test "$FLOORL_LIBM" != '?' && test "$CEILL_LIBM" != '?'; then
AC_DEFINE([HAVE_FLOORL_AND_CEILL], [1],
[Define if the both the floorl() and ceill() functions exist.])
ROUNDL_LIBM="$FLOORL_LIBM $CEILL_LIBM"
else
ROUNDL_LIBM=
fi
else
ROUNDL_LIBM=
fi
fi
AC_SUBST([ROUNDL_LIBM])
])
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