X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffloor.m4;h=a6e7ec8115d0385ecccf8c40802461b35c318f89;hb=03ea4328ae1ea7e985f7fd9a42ebf77bc64bd47c;hp=501d63640ed45f5d29378d9f4332e52c6dc70ec6;hpb=1602f0afed21be664fcf5c42d59db07cc22c56d6;p=gnulib.git

diff --git a/m4/floor.m4 b/m4/floor.m4
index 501d63640..a6e7ec811 100644
--- a/m4/floor.m4
+++ b/m4/floor.m4
@@ -1,4 +1,4 @@
-# floor.m4 serial 7
+# floor.m4 serial 8
 dnl Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -15,6 +15,7 @@ AC_DEFUN([gl_FUNC_FLOOR],
   fi
   m4_ifdef([gl_FUNC_FLOOR_IEEE], [
     if test $gl_floor_required = ieee && test $REPLACE_FLOOR = 0; then
+      AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
       AC_CACHE_CHECK([whether floor works according to ISO C 99 with IEC 60559],
         [gl_cv_func_floor_ieee],
         [
@@ -40,7 +41,13 @@ int main (int argc, char *argv[])
             ]])],
             [gl_cv_func_floor_ieee=yes],
             [gl_cv_func_floor_ieee=no],
-            [gl_cv_func_floor_ieee="guessing no"])
+            [case "$host_os" in
+                       # Guess yes on glibc systems.
+               *-gnu*) gl_cv_func_floor_ieee="guessing yes" ;;
+                       # If we don't know, assume the worst.
+               *)      gl_cv_func_floor_ieee="guessing no" ;;
+             esac
+            ])
           LIBS="$save_LIBS"
         ])
       case "$gl_cv_func_floor_ieee" in