X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fremainderf.m4;h=33df781c89e95c5de111295226b98ea4ecc3ee7e;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=8cb15ecbe3d166efc610fe5ffeddfb773169f824;hpb=33cfac68b39b6d6aad1046afa605fec41f95a1e5;p=gnulib.git

diff --git a/m4/remainderf.m4 b/m4/remainderf.m4
index 8cb15ecbe..33df781c8 100644
--- a/m4/remainderf.m4
+++ b/m4/remainderf.m4
@@ -1,5 +1,5 @@
-# remainderf.m4 serial 5
-dnl Copyright (C) 2012 Free Software Foundation, Inc.
+# remainderf.m4 serial 7
+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.
@@ -54,6 +54,7 @@ AC_DEFUN([gl_FUNC_REMAINDERF],
 
     m4_ifdef([gl_FUNC_REMAINDERF_IEEE], [
       if test $gl_remainderf_required = ieee && test $REPLACE_REMAINDERF = 0; then
+        AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
         AC_CACHE_CHECK([whether remainderf works according to ISO C 99 with IEC 60559],
           [gl_cv_func_remainderf_ieee],
           [
@@ -82,7 +83,6 @@ static float dummy (float x, float y) { return 0; }
 int main (int argc, char *argv[])
 {
   float (*my_remainderf) (float, float) = argc ? remainderf : dummy;
-  float i;
   float f;
   /* Test remainderf(...,0.0f).
      This test fails on OSF/1 5.1.  */
@@ -94,7 +94,13 @@ int main (int argc, char *argv[])
               ]])],
               [gl_cv_func_remainderf_ieee=yes],
               [gl_cv_func_remainderf_ieee=no],
-              [gl_cv_func_remainderf_ieee="guessing no"])
+              [case "$host_os" in
+                         # Guess yes on glibc systems.
+                 *-gnu*) gl_cv_func_remainderf_ieee="guessing yes" ;;
+                         # If we don't know, assume the worst.
+                 *)      gl_cv_func_remainderf_ieee="guessing no" ;;
+               esac
+              ])
             LIBS="$save_LIBS"
           ])
         case "$gl_cv_func_remainderf_ieee" in