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-rw-r--r--third_party/heimdal/cf/ax_check_sign.m454
1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/heimdal/cf/ax_check_sign.m4 b/third_party/heimdal/cf/ax_check_sign.m4
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+++ b/third_party/heimdal/cf/ax_check_sign.m4
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+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_check_sign.html
+# ===========================================================================
+#
+# 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.
+
+#serial 7
+
+AU_ALIAS([VL_CHECK_SIGN], [AX_CHECK_SIGN])
+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, [
+ AC_TRY_COMPILE([$4],
+ [ int foo @<:@ 1 - 2 * !((($1) -1) < 0) @:>@ ],
+ [ eval "ax_cv_decl_${typename}_signed=\"yes\"" ],
+ [ eval "ax_cv_decl_${typename}_signed=\"no\"" ])])
+ 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