diff options
Diffstat (limited to 'gnulib-m4/ssize_t.m4')
| -rw-r--r-- | gnulib-m4/ssize_t.m4 | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/gnulib-m4/ssize_t.m4 b/gnulib-m4/ssize_t.m4 index 03b2b895..25b28d77 100644 --- a/gnulib-m4/ssize_t.m4 +++ b/gnulib-m4/ssize_t.m4 @@ -1,23 +1,37 @@ -# ssize_t.m4 serial 5 (gettext-0.18.2) -dnl Copyright (C) 2001-2003, 2006, 2010-2022 Free Software Foundation, Inc. +# ssize_t.m4 serial 6 +dnl Copyright (C) 2001-2003, 2006, 2010-2024 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 Bruno Haible. -dnl Test whether ssize_t is defined. +dnl Define ssize_t if it does not already exist. AC_DEFUN([gt_TYPE_SSIZE_T], [ - AC_CACHE_CHECK([for ssize_t], [gt_cv_ssize_t], + AC_CACHE_CHECK([for ssize_t], [gl_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.]) + [gl_cv_ssize_t=yes], [gl_cv_ssize_t=no])]) + if test $gl_cv_ssize_t = no; then + dnl On 64-bit native Windows, ssize_t needs to be defined as 'long long', + dnl for consistency with the 64-bit size_t. + AC_CACHE_CHECK([whether size_t is wider than 'long'], [gl_cv_size_t_large], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[#include <sys/types.h> + typedef int array [2 * (sizeof (size_t) > sizeof (long)) - 1]; + ]])], + [gl_cv_size_t_large=yes], [gl_cv_size_t_large=no])]) + if test $gl_cv_size_t_large = yes; then + gl_def_ssize_t='long long' + else + gl_def_ssize_t='long' + fi + AC_DEFINE_UNQUOTED([ssize_t], [$gl_def_ssize_t], + [Define as a signed type of the same size as size_t.]) fi ]) |