X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fssize_t.m4;h=4eaef93ce37ece14d9ba6b26b2e28ec3016b4d17;hb=20b5ea915e5041b7d27d6d4fea6fc34a1d89dc45;hp=c97ab2ec060469376f9928f794c8ba4fe58aad5b;hpb=25d8d8564059e0773aec16a7be1f434017950575;p=gnulib.git

diff --git a/m4/ssize_t.m4 b/m4/ssize_t.m4
index c97ab2ec0..4eaef93ce 100644
--- a/m4/ssize_t.m4
+++ b/m4/ssize_t.m4
@@ -1,22 +1,21 @@
-#serial 1
+# ssize_t.m4 serial 4 (gettext-0.15)
+dnl Copyright (C) 2001-2003, 2006 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.
 
-AC_PREREQ(2.14a)
+dnl From Bruno Haible.
+dnl Test whether ssize_t is defined.
 
-dnl This is a specialization of AC_CHECK_TYPE applied to `ssize_t' with
-dnl the difference that it also includes unistd.h on systems that have it.
-dnl On Fujitsu UXP/V systems ssize_t is defined in unistd.h.
-AC_DEFUN(AC_TYPE_SSIZE_T,
-  [
-    AC_CHECK_HEADERS(unistd.h)
-    AC_CHECK_TYPE(ssize_t, int,
-      [
-#include <sys/types.h>
-#if STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#endif
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-      ]
-  )])
+AC_DEFUN([gt_TYPE_SSIZE_T],
+[
+  AC_CACHE_CHECK([for ssize_t], [gt_cv_ssize_t],
+    [AC_TRY_COMPILE([#include <sys/types.h>],
+       [int x = sizeof (ssize_t *) + sizeof (ssize_t);
+        return !x;],
+       [gt_cv_ssize_t=yes], [gt_cv_ssize_t=no])])
+  if test $gt_cv_ssize_t = no; then
+    AC_DEFINE([ssize_t], [int],
+              [Define as a signed type of the same size as size_t.])
+  fi
+])