* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __WS_ATTRIBUTES_H__
#define __WS_ATTRIBUTES_H__
+#include "ws_compiler_tests.h"
+
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
-/*
- * This was introduced by Clang:
- *
- * http://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
- *
- * in some version (which version?); it has been picked up by GCC 5.0.
- */
-#ifndef __has_attribute
- /*
- * It's a macro, so you can check whether it's defined to check
- * whether it's supported.
- *
- * If it's not, define it to always return 0, so that we move on to
- * the fallback checks.
- */
- #define __has_attribute(x) 0
-#endif
-
-/*
- * Note that the C90 spec's "6.8.1 Conditional inclusion" and the
- * C99 spec's and C11 spec's "6.10.1 Conditional inclusion" say:
- *
- * Prior to evaluation, macro invocations in the list of preprocessing
- * tokens that will become the controlling constant expression are
- * replaced (except for those macro names modified by the defined unary
- * operator), just as in normal text. If the token "defined" is
- * generated as a result of this replacement process or use of the
- * "defined" unary operator does not match one of the two specified
- * forms prior to macro replacement, the behavior is undefined.
- *
- * so you shouldn't use defined() in a #define that's used in #if or
- * #elif. Some versions of Clang, for example, will warn about this.
- *
- * Instead, we check whether the pre-defined macros for particular
- * compilers are defined and, if not, define the "is this version XXX
- * or a later version of this compiler" macros as 0.
- */
-
-/*
- * Check whether this is GCC major.minor or a later release, or some
- * compiler that claims to be "just like GCC" of that version or a
- * later release.
- */
-
-#if !defined(__GNUC__)
- #define WS_IS_AT_LEAST_GNUC_VERSION(major, minor) 0
-#else
- #define WS_IS_AT_LEAST_GNUC_VERSION(major, minor) \
- (__GNUC__ > (major) || \
- (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
-#endif
-
-/*
- * Check whether this is Sun C/SunPro C/Oracle Studio major.minor
- * or a later release.
- *
- * The version number in __SUNPRO_C is encoded in hex BCD, with the
- * uppermost hex digit being the major version number, the next
- * one or two hex digits being the minor version number, and
- * the last digit being the patch version.
- *
- * It represents the *compiler* version, not the product version;
- * see
- *
- * https://sourceforge.net/p/predef/wiki/Compilers/
- *
- * for a partial mapping, which we assume continues for later
- * 12.x product releases.
- */
-
-#if !defined(__SUNPRO_C)
- #define WS_IS_AT_LEAST_SUNC_VERSION(major, minor) 0
-#else
- #define WS_SUNPRO_VERSION_TO_BCD(major, minor) \
- (((minor) >= 10) ? \
- (((major) << 12) | (((minor)/10) << 8) | (((minor)%10) << 4)) : \
- (((major) << 8) | ((minor) << 4)))
- #define WS_IS_AT_LEAST_SUNC_VERSION(major, minor) \
- (__SUNPRO_C >= WS_SUNPRO_VERSION_TO_BCD((major), (minor)))
-#endif
-
-/*
- * Check whether this is IBM XL C major.minor or a later release.
- *
- * The version number in __xlC__ has the major version in the
- * upper 8 bits and the minor version in the lower 8 bits.
- */
-
-#if !defined(__xlC__)
- #define WS_IS_AT_LEAST_XL_C_VERSION(major, minor) 0
-#else
- #define WS_IS_AT_LEAST_XL_C_VERSION(major, minor) \
- (__xlC__ >= (((major) << 8) | (minor)))
-#endif
-
-/*
- * Check whether this is HP aC++/HP C major.minor or a later release.
- *
- * The version number in __HP_aCC is encoded in zero-padded decimal BCD,
- * with the "A." stripped off, the uppermost two decimal digits being
- * the major version number, the next two decimal digits being the minor
- * version number, and the last two decimal digits being the patch version.
- * (Strip off the A., remove the . between the major and minor version
- * number, and add two digits of patch.)
- */
-
-#if !defined(__HP_aCC)
- #define WS_IS_AT_LEAST_HP_C_VERSION(major, minor) 0
-#else
- #define WS_IS_AT_LEAST_HP_C_VERSION(major, minor) \
- (__HP_aCC >= ((major)*10000 + (minor)*100))
-#endif
-
/*
* If we're running GCC or clang define _U_ to be "__attribute__((unused))"
* so we can use _U_ to flag unused function parameters and not get warnings
git.samba.org / metze / wireshark / wip.git / blobdiff