X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fremainder.m4;h=c6abf95616061c81fe9aa5774b9d3e55d4fddc1d;hb=133948aba19552e7bc92aa38a667347791da7e86;hp=f788a20fc73ae4d9c7744d1b2c1b440f8e4ab485;hpb=9655379852fdbf3a0797035fc30a4060a2b191cf;p=gnulib.git

diff --git a/m4/remainder.m4 b/m4/remainder.m4
index f788a20fc..c6abf9561 100644
--- a/m4/remainder.m4
+++ b/m4/remainder.m4
@@ -1,5 +1,5 @@
-# remainder.m4 serial 3
-dnl Copyright (C) 2012 Free Software Foundation, Inc.
+# remainder.m4 serial 4
+dnl Copyright (C) 2012-2013 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.
@@ -56,6 +56,7 @@ AC_DEFUN([gl_FUNC_REMAINDER],
     :
     m4_ifdef([gl_FUNC_REMAINDER_IEEE], [
       if test $gl_remainder_required = ieee && test $REPLACE_REMAINDER = 0; then
+        AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
         AC_CACHE_CHECK([whether remainder works according to ISO C 99 with IEC 60559],
           [gl_cv_func_remainder_ieee],
           [
@@ -90,7 +91,13 @@ int main (int argc, char *argv[])
               ]])],
               [gl_cv_func_remainder_ieee=yes],
               [gl_cv_func_remainder_ieee=no],
-              [gl_cv_func_remainder_ieee="guessing no"])
+              [case "$host_os" in
+                         # Guess yes on glibc systems.
+                 *-gnu*) gl_cv_func_remainder_ieee="guessing yes" ;;
+                         # If we don't know, assume the worst.
+                 *)      gl_cv_func_remainder_ieee="guessing no" ;;
+               esac
+              ])
             LIBS="$save_LIBS"
           ])
         case "$gl_cv_func_remainder_ieee" in