diff options
Diffstat (limited to 'gnulib-m4/printf-frexpl.m4')
| -rw-r--r-- | gnulib-m4/printf-frexpl.m4 | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/gnulib-m4/printf-frexpl.m4 b/gnulib-m4/printf-frexpl.m4 index ab0eccf..14ffe1f 100644 --- a/gnulib-m4/printf-frexpl.m4 +++ b/gnulib-m4/printf-frexpl.m4 @@ -1,5 +1,5 @@ -# printf-frexpl.m4 serial 10 -dnl Copyright (C) 2007, 2009-2015 Free Software Foundation, Inc. +# printf-frexpl.m4 serial 6 +dnl Copyright (C) 2007, 2009, 2010 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. @@ -9,10 +9,17 @@ dnl Check how to define printf_frexpl() without linking with libm. AC_DEFUN([gl_FUNC_PRINTF_FREXPL], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) - AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) - dnl Subset of gl_FUNC_FREXPL_NO_LIBM. - gl_CHECK_FREXPL_NO_LIBM + AC_CACHE_CHECK([whether frexpl can be used without linking with libm], + [gl_cv_func_frexpl_no_libm], + [ + AC_TRY_LINK([#include <math.h> + long double x; + int y;], + [return frexpl (x, &y) < 1;], + [gl_cv_func_frexpl_no_libm=yes], + [gl_cv_func_frexpl_no_libm=no]) + ]) if test $gl_cv_func_frexpl_no_libm = yes; then gl_FUNC_FREXPL_WORKS case "$gl_cv_func_frexpl_works" in @@ -28,11 +35,20 @@ AC_DEFUN([gl_FUNC_PRINTF_FREXPL], AC_DEFINE([HAVE_FREXPL_IN_LIBC], [1], [Define if the frexpl function is available in libc.]) dnl Also check whether it's declared. - dnl Mac OS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>. - AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [[#include <math.h>]]) + dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>. + AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>]) fi - gl_CHECK_LDEXPL_NO_LIBM + AC_CACHE_CHECK([whether ldexpl can be used without linking with libm], + [gl_cv_func_ldexpl_no_libm], + [ + AC_TRY_LINK([#include <math.h> + long double x; + int y;], + [return ldexpl (x, y) < 1;], + [gl_cv_func_ldexpl_no_libm=yes], + [gl_cv_func_ldexpl_no_libm=no]) + ]) if test $gl_cv_func_ldexpl_no_libm = yes; then gl_FUNC_LDEXPL_WORKS case "$gl_cv_func_ldexpl_works" in @@ -40,8 +56,8 @@ AC_DEFUN([gl_FUNC_PRINTF_FREXPL], AC_DEFINE([HAVE_LDEXPL_IN_LIBC], [1], [Define if the ldexpl function is available in libc.]) dnl Also check whether it's declared. - dnl Mac OS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>. - AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [[#include <math.h>]]) + dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>. + AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [#include <math.h>]) ;; esac fi |