maint: update copyright

[gnulib.git] / m4 / ssize_t.m4

diff --git a/m4/ssize_t.m4 b/m4/ssize_t.m4
index 7f2e6d9..fbe1d06 100644 (file)
--- a/m4/ssize_t.m4
+++ b/m4/ssize_t.m4
@@ -1,19 +1,23 @@
-#serial 1
+# ssize_t.m4 serial 5 (gettext-0.18.2)
+dnl Copyright (C) 2001-2003, 2006, 2010-2014 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.
 
-dnl From Jim Meyering
+dnl From Bruno Haible.
+dnl Test whether ssize_t is defined.
 
-# If ssize_t is not defined in sys/types.h, define it to `int'.
-
-AC_DEFUN(jm_TYPE_SSIZE_T,
-  [AC_CACHE_CHECK(for ssize_t in sys/types.h, jm_ac_cv_type_ssize_t,
-    [
-      AC_EGREP_HEADER(ssize_t, sys/types.h,
-                     jm_ac_cv_type_ssize_t=yes,
-                     jm_ac_cv_type_ssize_t=no)
-      if test $jm_ac_cv_type_ssize_t = no; then
-       AC_DEFINE(ssize_t, int)
-      fi
-    ]
-   )
-  ]
-)
+AC_DEFUN([gt_TYPE_SSIZE_T],
+[
+  AC_CACHE_CHECK([for ssize_t], [gt_cv_ssize_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#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
+])