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Diffstat (limited to 'gnulib-m4/printf-frexpl.m4')
-rw-r--r--gnulib-m4/printf-frexpl.m436
1 files changed, 26 insertions, 10 deletions
diff --git a/gnulib-m4/printf-frexpl.m4 b/gnulib-m4/printf-frexpl.m4
index ab0eccf0..14ffe1fc 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