diff options
author | Guy Harris <guy@alum.mit.edu> | 2017-10-26 14:59:40 -0700 |
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committer | Guy Harris <guy@alum.mit.edu> | 2017-10-26 22:01:16 +0000 |
commit | a0973d0f947df731e9e182c8b03d6e351591f457 (patch) | |
tree | fbf297d206685b9dbe6b92674f6c79dea14b1b27 /ws_compiler_tests.h | |
parent | ea49c337c59ac9a8d0b868581f341092f4b61814 (diff) |
Move the compiler version tests to ws_compiler_tests.h and use them elsewhere.
While we're at it, sort some header file lists, and clean up white
space.
Change-Id: If737dda45334fedf1df7295d8719ad9381daf7a1
Reviewed-on: https://code.wireshark.org/review/24089
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Diffstat (limited to 'ws_compiler_tests.h')
-rw-r--r-- | ws_compiler_tests.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/ws_compiler_tests.h b/ws_compiler_tests.h new file mode 100644 index 0000000000..0e0fb1b0e2 --- /dev/null +++ b/ws_compiler_tests.h @@ -0,0 +1,150 @@ +/* ws_compiler_tests.h + * + * Wireshark - Network traffic analyzer + * 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. + */ + +#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__ */ |