X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffmod.m4;h=9373710cb258b11853e991a51dc340e7741de24e;hb=9f1f81e4362dd265a2fa54b30b16ceed123cd4e5;hp=26dd47e1e0d0f1882fdcd2142bca33af9a2d8e3f;hpb=6d3de8267949cc5cf4f5ff98efcd132d93a9c861;p=gnulib.git

diff --git a/m4/fmod.m4 b/m4/fmod.m4
index 26dd47e1e..9373710cb 100644
--- a/m4/fmod.m4
+++ b/m4/fmod.m4
@@ -1,4 +1,4 @@
-# fmod.m4 serial 3
+# fmod.m4 serial 4
 dnl Copyright (C) 2011-2012 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -14,6 +14,7 @@ AC_DEFUN([gl_FUNC_FMOD],
 
   m4_ifdef([gl_FUNC_FMOD_IEEE], [
     if test $gl_fmod_required = ieee && test $REPLACE_FMOD = 0; then
+      AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
       AC_CACHE_CHECK([whether fmod works according to ISO C 99 with IEC 60559],
         [gl_cv_func_fmod_ieee],
         [
@@ -56,7 +57,13 @@ int main (int argc, char *argv[])
             ]])],
             [gl_cv_func_fmod_ieee=yes],
             [gl_cv_func_fmod_ieee=no],
-            [gl_cv_func_fmod_ieee="guessing no"])
+            [case "$host_os" in
+                       # Guess yes on glibc systems.
+               *-gnu*) gl_cv_func_fmod_ieee="guessing yes" ;;
+                       # If we don't know, assume the worst.
+               *)      gl_cv_func_fmod_ieee="guessing no" ;;
+             esac
+            ])
           LIBS="$save_LIBS"
         ])
       case "$gl_cv_func_fmod_ieee" in