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Diffstat (limited to 'pcap/compiler-tests.h')
| -rw-r--r-- | pcap/compiler-tests.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/pcap/compiler-tests.h b/pcap/compiler-tests.h new file mode 100644 index 0000000..ea5962c --- /dev/null +++ b/pcap/compiler-tests.h @@ -0,0 +1,163 @@ +/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ +/* + * Copyright (c) 1993, 1994, 1995, 1996, 1997 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the Computer Systems + * Engineering Group at Lawrence Berkeley Laboratory. + * 4. Neither the name of the University nor of the Laboratory may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lib_pcap_compiler_tests_h +#define lib_pcap_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 PCAP_IS_AT_LEAST_GNUC_VERSION(major, minor) 0 +#else +#define PCAP_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 PCAP_IS_AT_LEAST_CLANG_VERSION(major, minor) 0 +#else +#define PCAP_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 PCAP_IS_AT_LEAST_SUNC_VERSION(major,minor) 0 +#else +#define PCAP_SUNPRO_VERSION_TO_BCD(major, minor) \ + (((minor) >= 10) ? \ + (((major) << 12) | (((minor)/10) << 8) | (((minor)%10) << 4)) : \ + (((major) << 8) | ((minor) << 4))) +#define PCAP_IS_AT_LEAST_SUNC_VERSION(major,minor) \ + (__SUNPRO_C >= PCAP_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 PCAP_IS_AT_LEAST_XL_C_VERSION(major,minor) 0 +#else +#define PCAP_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 PCAP_IS_AT_LEAST_HP_C_VERSION(major,minor) 0 +#else +#define PCAP_IS_AT_LEAST_HP_C_VERSION(major,minor) \ + (__HP_aCC >= ((major)*10000 + (minor)*100)) +#endif + +#endif /* lib_pcap_compiler_tests_h */ |