X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fprintf-frexp.m4;h=83ff9ce71573c3bd841bb564f8f8eb2107b4b4a7;hb=50ef96d5a5201fa07917adcf7a118cb45d4de80a;hp=9cb68c318657239b1334d6b041b91065413b310f;hpb=e5de8bf80c52f872c5ca944db9bf3fd28993bd2e;p=gnulib.git

diff --git a/m4/printf-frexp.m4 b/m4/printf-frexp.m4
index 9cb68c318..83ff9ce71 100644
--- a/m4/printf-frexp.m4
+++ b/m4/printf-frexp.m4
@@ -1,5 +1,5 @@
-# printf-frexp.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# printf-frexp.m4 serial 5
+dnl Copyright (C) 2007, 2009-2011 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.
@@ -8,33 +8,31 @@ dnl Check how to define printf_frexp() without linking with libm.
 
 AC_DEFUN([gl_FUNC_PRINTF_FREXP],
 [
-  AC_CACHE_CHECK([whether frexp can be used without linking with libm],
-    [gl_cv_func_frexp_no_libm],
-    [
-      AC_TRY_LINK([#include <math.h>
-                   double x;
-                   int y;],
-                  [return frexp (x, &y) < 1;],
-        [gl_cv_func_frexp_no_libm=yes],
-        [gl_cv_func_frexp_no_libm=no])
-    ])
+  AC_REQUIRE([gl_CHECK_FREXP_NO_LIBM])
   if test $gl_cv_func_frexp_no_libm = yes; then
-    AC_DEFINE([HAVE_FREXP_IN_LIBC], 1,
-      [Define if the frexp function is available in libc.])
+    gl_FUNC_FREXP_WORKS
+    case "$gl_cv_func_frexp_works" in
+      *yes)
+        AC_DEFINE([HAVE_FREXP_IN_LIBC], [1],
+          [Define if the frexp function is available in libc.])
+        ;;
+    esac
   fi
 
   AC_CACHE_CHECK([whether ldexp can be used without linking with libm],
     [gl_cv_func_ldexp_no_libm],
     [
-      AC_TRY_LINK([#include <math.h>
-                   double x;
-                   int y;],
-                  [return ldexp (x, y) < 1;],
+      AC_LINK_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[#include <math.h>
+             double x;
+             int y;]],
+           [[return ldexp (x, y) < 1;]])],
         [gl_cv_func_ldexp_no_libm=yes],
         [gl_cv_func_ldexp_no_libm=no])
     ])
   if test $gl_cv_func_ldexp_no_libm = yes; then
-    AC_DEFINE([HAVE_LDEXP_IN_LIBC], 1,
+    AC_DEFINE([HAVE_LDEXP_IN_LIBC], [1],
       [Define if the ldexp function is available in libc.])
   fi
 ])