X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Froundl.m4;h=90c6bd0165ce0090fc12601870e2e5b983443aa3;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=a48f878d3e1898ae435553919ee90ac5e5bef80a;hpb=76db5ae75eab1d97d66e6133532ea406c281fb4a;p=gnulib.git

diff --git a/m4/roundl.m4 b/m4/roundl.m4
index a48f878d3..90c6bd016 100644
--- a/m4/roundl.m4
+++ b/m4/roundl.m4
@@ -1,5 +1,5 @@
-# roundl.m4 serial 14
-dnl Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
+# roundl.m4 serial 15
+dnl Copyright (C) 2007, 2009-2014 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.
@@ -28,6 +28,7 @@ AC_DEFUN([gl_FUNC_ROUNDL],
 
     m4_ifdef([gl_FUNC_ROUNDL_IEEE], [
       if test $gl_roundl_required = ieee && test $REPLACE_ROUNDL = 0; then
+        AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
         AC_CACHE_CHECK([whether roundl works according to ISO C 99 with IEC 60559],
           [gl_cv_func_roundl_ieee],
           [
@@ -62,7 +63,13 @@ int main (int argc, char *argv[])
               ]])],
               [gl_cv_func_roundl_ieee=yes],
               [gl_cv_func_roundl_ieee=no],
-              [gl_cv_func_roundl_ieee="guessing no"])
+              [case "$host_os" in
+                         # Guess yes on glibc systems.
+                 *-gnu*) gl_cv_func_roundl_ieee="guessing yes" ;;
+                         # If we don't know, assume the worst.
+                 *)      gl_cv_func_roundl_ieee="guessing no" ;;
+               esac
+              ])
             LIBS="$save_LIBS"
           ])
         case "$gl_cv_func_roundl_ieee" in