139 lines
4.3 KiB
C
139 lines
4.3 KiB
C
/* ws_compiler_tests.h
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#ifndef __WS_COMPILER_TESTS_H__
|
|
#define __WS_COMPILER_TESTS_H__
|
|
|
|
/*
|
|
* 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 Clang major.minor or a later release.
|
|
*/
|
|
|
|
#if !defined(__clang__)
|
|
#define WS_IS_AT_LEAST_CLANG_VERSION(major, minor) 0
|
|
#else
|
|
#define WS_IS_AT_LEAST_CLANG_VERSION(major, minor) \
|
|
(__clang_major__ > (major) || \
|
|
(__clang_major__ == (major) && __clang_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
|
|
|
|
#endif /* __WS_COMPILER_TESTS_H__ */
|