1 # printf-frexpl.m4 serial 10
2 dnl Copyright (C) 2007, 2009-2017 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 dnl Check how to define printf_frexpl() without linking with libm.
9 AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
11 AC_REQUIRE([gl_MATH_H_DEFAULTS])
12 AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
14 dnl Subset of gl_FUNC_FREXPL_NO_LIBM.
15 gl_CHECK_FREXPL_NO_LIBM
16 if test $gl_cv_func_frexpl_no_libm = yes; then
18 case "$gl_cv_func_frexpl_works" in
19 *yes) gl_func_frexpl_no_libm=yes ;;
20 *) gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;;
23 gl_func_frexpl_no_libm=no
24 dnl Set REPLACE_FREXPL here because the system may have frexpl in libm.
27 if test $gl_func_frexpl_no_libm = yes; then
28 AC_DEFINE([HAVE_FREXPL_IN_LIBC], [1],
29 [Define if the frexpl function is available in libc.])
30 dnl Also check whether it's declared.
31 dnl Mac OS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>.
32 AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [[#include <math.h>]])
35 gl_CHECK_LDEXPL_NO_LIBM
36 if test $gl_cv_func_ldexpl_no_libm = yes; then
38 case "$gl_cv_func_ldexpl_works" in
40 AC_DEFINE([HAVE_LDEXPL_IN_LIBC], [1],
41 [Define if the ldexpl function is available in libc.])
42 dnl Also check whether it's declared.
43 dnl Mac OS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
44 AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [[#include <math.h>]])