X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffmod.m4;h=139afe6d0867529d25026b01dfd6aa3c7d478026;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=26dd47e1e0d0f1882fdcd2142bca33af9a2d8e3f;hpb=0874a5828bbb4784e9c9d54243b3c978e8e54ece;p=gnulib.git

diff --git a/m4/fmod.m4 b/m4/fmod.m4
index 26dd47e1e..139afe6d0 100644
--- a/m4/fmod.m4
+++ b/m4/fmod.m4
@@ -1,5 +1,5 @@
-# fmod.m4 serial 3
-dnl Copyright (C) 2011-2012 Free Software Foundation, Inc.
+# fmod.m4 serial 4
+dnl Copyright (C) 2011-2013 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.
@@ -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