1 # printf-frexpl.m4 serial 10 2 dnl Copyright (C) 2007, 2009-2012 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. 6 7 dnl Check how to define printf_frexpl() without linking with libm. 8 9 AC_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
