1# printf-frexpl.m4 serial 10
2dnl Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl Check how to define printf_frexpl() without linking with libm.
8
9AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
10[
11  AC_REQUIRE([gl_MATH_H_DEFAULTS])
12  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
13
14  dnl Subset of gl_FUNC_FREXPL_NO_LIBM.
15  gl_CHECK_FREXPL_NO_LIBM
16  if test $gl_cv_func_frexpl_no_libm = yes; then
17    gl_FUNC_FREXPL_WORKS
18    case "$gl_cv_func_frexpl_works" in
19      *yes) gl_func_frexpl_no_libm=yes ;;
20      *)    gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;;
21    esac
22  else
23    gl_func_frexpl_no_libm=no
24    dnl Set REPLACE_FREXPL here because the system may have frexpl in libm.
25    REPLACE_FREXPL=1
26  fi
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>]])
33  fi
34
35  gl_CHECK_LDEXPL_NO_LIBM
36  if test $gl_cv_func_ldexpl_no_libm = yes; then
37    gl_FUNC_LDEXPL_WORKS
38    case "$gl_cv_func_ldexpl_works" in
39      *yes)
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>]])
45        ;;
46    esac
47  fi
48])
49