2 dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_FLOORL],
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
10 dnl Persuade glibc <math.h> to declare floorl().
11 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
12 dnl Test whether floorl() is declared.
13 AC_CHECK_DECLS([floorl], , , [#include <math.h>])
14 if test "$ac_cv_have_decl_floorl" = yes; then
15 dnl Test whether floorl() can be used without libm.
17 if test "$FLOORL_LIBM" = "?"; then
18 dnl Sun C 5.0 on Solaris declares floorl() and has it in the system-wide
19 dnl libm.so, but not in the libm.so that the compiler uses.
25 if test $HAVE_DECL_FLOORL = 0 || test $REPLACE_FLOORL = 1; then
26 dnl No libraries are needed to link lib/floorl.c.
29 AC_SUBST([FLOORL_LIBM])
32 # Determines the libraries needed to get the floorl() function.
34 AC_DEFUN([gl_FUNC_FLOORL_LIBS],
36 gl_CACHE_VAL_SILENT([gl_cv_func_floorl_libm], [
37 gl_cv_func_floorl_libm=?
40 [[#ifndef __NO_MATH_INLINES
41 # define __NO_MATH_INLINES 1 /* for glibc */
46 [gl_cv_func_floorl_libm=])
47 if test "$gl_cv_func_floorl_libm" = "?"; then
52 [[#ifndef __NO_MATH_INLINES
53 # define __NO_MATH_INLINES 1 /* for glibc */
58 [gl_cv_func_floorl_libm="-lm"])
62 FLOORL_LIBM="$gl_cv_func_floorl_libm"