2016-09-28 14:40:37 +00:00
|
|
|
# ===========================================================================
|
2023-10-27 18:20:02 +09:00
|
|
|
# https://www.gnu.org/software/autoconf-archive/ax_check_sign.html
|
2016-09-28 14:40:37 +00:00
|
|
|
# ===========================================================================
|
|
|
|
|
#
|
|
|
|
|
# SYNOPSIS
|
|
|
|
|
#
|
|
|
|
|
# AX_CHECK_SIGN (TYPE, [ACTION-IF-SIGNED], [ACTION-IF-UNSIGNED], [INCLUDES])
|
|
|
|
|
#
|
|
|
|
|
# DESCRIPTION
|
|
|
|
|
#
|
|
|
|
|
# Checks whether TYPE is signed or not. If no INCLUDES are specified, the
|
|
|
|
|
# default includes are used. If ACTION-IF-SIGNED is given, it is
|
|
|
|
|
# additional shell code to execute when the type is signed. If
|
|
|
|
|
# ACTION-IF-UNSIGNED is given, it is executed when the type is unsigned.
|
|
|
|
|
#
|
|
|
|
|
# This macro assumes that the type exists. Therefore the existence of the
|
|
|
|
|
# type should be checked before calling this macro. For example:
|
|
|
|
|
#
|
|
|
|
|
# AC_CHECK_HEADERS([wchar.h])
|
|
|
|
|
# AC_CHECK_TYPE([wchar_t],,[ AC_MSG_ERROR([Type wchar_t not found.]) ])
|
|
|
|
|
# AX_CHECK_SIGN([wchar_t],
|
|
|
|
|
# [ AC_DEFINE(WCHAR_T_SIGNED, 1, [Define if wchar_t is signed]) ],
|
|
|
|
|
# [ AC_DEFINE(WCHAR_T_UNSIGNED, 1, [Define if wchar_t is unsigned]) ], [
|
|
|
|
|
# #ifdef HAVE_WCHAR_H
|
|
|
|
|
# #include <wchar.h>
|
|
|
|
|
# #endif
|
|
|
|
|
# ])
|
|
|
|
|
#
|
|
|
|
|
# LICENSE
|
|
|
|
|
#
|
|
|
|
|
# Copyright (c) 2008 Ville Laurikari <vl@iki.fi>
|
|
|
|
|
#
|
|
|
|
|
# Copying and distribution of this file, with or without modification, are
|
|
|
|
|
# permitted in any medium without royalty provided the copyright notice
|
|
|
|
|
# and this notice are preserved. This file is offered as-is, without any
|
|
|
|
|
# warranty.
|
|
|
|
|
|
2023-10-27 18:20:02 +09:00
|
|
|
#serial 10
|
2016-09-28 14:40:37 +00:00
|
|
|
|
2023-10-27 18:20:02 +09:00
|
|
|
AU_ALIAS([VL_CHECK_SIGN], [AX_CHECK_SIGN])
|
2016-09-28 14:40:37 +00:00
|
|
|
AC_DEFUN([AX_CHECK_SIGN], [
|
|
|
|
|
typename=`echo $1 | sed "s/@<:@^a-zA-Z0-9_@:>@/_/g"`
|
|
|
|
|
AC_CACHE_CHECK([whether $1 is signed], ax_cv_decl_${typename}_signed, [
|
2023-10-27 18:20:02 +09:00
|
|
|
AC_COMPILE_IFELSE(
|
|
|
|
|
[AC_LANG_PROGRAM([[$4]],
|
|
|
|
|
[[ int foo @<:@ 1 - 2 * !((($1) -1) < 0) @:>@ ; (void)foo[0] ]])],
|
2016-09-28 14:40:37 +00:00
|
|
|
[ eval "ax_cv_decl_${typename}_signed=\"yes\"" ],
|
2023-10-27 18:20:02 +09:00
|
|
|
[ eval "ax_cv_decl_${typename}_signed=\"no\"" ])
|
|
|
|
|
])
|
2016-09-28 14:40:37 +00:00
|
|
|
symbolname=`echo $1 | sed "s/@<:@^a-zA-Z0-9_@:>@/_/g" | tr "a-z" "A-Z"`
|
|
|
|
|
if eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"yes\""; then
|
|
|
|
|
$2
|
|
|
|
|
elif eval "test \"\${ax_cv_decl_${typename}_signed}\" = \"no\""; then
|
|
|
|
|
$3
|
|
|
|
|
fi
|
|
|
|
|
])dnl
|
