X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=m4%2Ffree.m4;h=24bbbb184f195064392219e827ac19ffc26a1c14;hb=c8228c7d1f864908fd64cd47eefb418e419da549;hp=99ebc9ae994303f9137806fb7c0c29ac48c9fb7e;hpb=44d7c1c1f004fa9bfb8ec3948de2671a7958cf5b;p=pspp

diff --git a/m4/free.m4 b/m4/free.m4
index 99ebc9ae99..24bbbb184f 100644
--- a/m4/free.m4
+++ b/m4/free.m4
@@ -1,6 +1,6 @@
 # Check whether free (NULL) is supposed to work.
 
-# Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2003-2005, 2009-2011 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -16,25 +16,21 @@
 
 AC_DEFUN([gl_FUNC_FREE],
 [
-  AC_CHECK_HEADERS_ONCE(unistd.h)
   AC_CACHE_CHECK([whether free (NULL) is known to work],
     [gl_cv_func_free],
     [AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM(
-	  [[@%:@if HAVE_UNISTD_H
-	      @%:@include <unistd.h>
-	    @%:@endif]],
-	  [[@%:@if _POSIX_VERSION < 199009L && \
-	        (defined unix || defined _unix || defined _unix_ \
-	         || defined __unix || defined __unix__)
-	      @%:@error "'free (NULL)' is not known to work"
-	    @%:@endif]])],
+          [[@%:@include <unistd.h>]],
+          [[@%:@if _POSIX_VERSION < 199009L && \
+                (defined unix || defined _unix || defined _unix_ \
+                 || defined __unix || defined __unix__)
+              @%:@error "'free (NULL)' is not known to work"
+            @%:@endif]])],
        [gl_cv_func_free=yes],
        [gl_cv_func_free=no])])
 
   if test $gl_cv_func_free = no; then
-    AC_LIBOBJ(free)
-    AC_DEFINE(free, rpl_free,
+    AC_DEFINE([free], [rpl_free],
       [Define to rpl_free if the replacement function should be used.])
   fi
 ])