m4/ssize_t.m4

   1 # ssize_t.m4 serial 5 (gettext-0.18.2)
   2 dnl Copyright (C) 2001-2003, 2006, 2010-2014 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 dnl From Bruno Haible.
   8 dnl Test whether ssize_t is defined.
   9
  10 AC_DEFUN([gt_TYPE_SSIZE_T],
  11 [
  12   AC_CACHE_CHECK([for ssize_t], [gt_cv_ssize_t],
  13     [AC_COMPILE_IFELSE(
  14        [AC_LANG_PROGRAM(
  15           [[#include <sys/types.h>]],
  16           [[int x = sizeof (ssize_t *) + sizeof (ssize_t);
  17             return !x;]])],
  18        [gt_cv_ssize_t=yes], [gt_cv_ssize_t=no])])
  19   if test $gt_cv_ssize_t = no; then
  20     AC_DEFINE([ssize_t], [int],
  21               [Define as a signed type of the same size as size_t.])
  22   fi
  23 ])