X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Froundf.m4;h=94c1c3e968a9abc0de4bd5217d60250a0881c599;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=fc07b762cefbe2b0635205512316a7265431521e;hpb=89f85637d7d41ceedb7e789d503fd852b6d663ac;p=gnulib.git

diff --git a/m4/roundf.m4 b/m4/roundf.m4
index fc07b762c..94c1c3e96 100644
--- a/m4/roundf.m4
+++ b/m4/roundf.m4
@@ -1,5 +1,5 @@
-# roundf.m4 serial 16
-dnl Copyright (C) 2007-2012 Free Software Foundation, Inc.
+# roundf.m4 serial 17
+dnl Copyright (C) 2007-2013 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.
@@ -69,6 +69,7 @@ int main()
 
     m4_ifdef([gl_FUNC_ROUNDF_IEEE], [
       if test $gl_roundf_required = ieee && test $REPLACE_ROUNDF = 0; then
+        AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
         AC_CACHE_CHECK([whether roundf works according to ISO C 99 with IEC 60559],
           [gl_cv_func_roundf_ieee],
           [
@@ -103,7 +104,13 @@ int main (int argc, char *argv[])
               ]])],
               [gl_cv_func_roundf_ieee=yes],
               [gl_cv_func_roundf_ieee=no],
-              [gl_cv_func_roundf_ieee="guessing no"])
+              [case "$host_os" in
+                         # Guess yes on glibc systems.
+                 *-gnu*) gl_cv_func_roundf_ieee="guessing yes" ;;
+                         # If we don't know, assume the worst.
+                 *)      gl_cv_func_roundf_ieee="guessing no" ;;
+               esac
+              ])
             LIBS="$save_LIBS"
           ])
         case "$gl_cv_func_roundf_ieee" in