/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* Various compiler checks. */ #ifndef mozilla_Compiler_h #define mozilla_Compiler_h #define MOZ_IS_GCC 0 #define MOZ_IS_MSVC 0 #if !defined(__clang__) && defined(__GNUC__) # undef MOZ_IS_GCC # define MOZ_IS_GCC 1 /* * These macros should simplify gcc version checking. For example, to check * for gcc 4.7.1 or later, check `#if MOZ_GCC_VERSION_AT_LEAST(4, 7, 1)`. */ # define MOZ_GCC_VERSION_AT_LEAST(major, minor, patchlevel) \ ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) \ >= ((major) * 10000 + (minor) * 100 + (patchlevel))) # define MOZ_GCC_VERSION_AT_MOST(major, minor, patchlevel) \ ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) \ <= ((major) * 10000 + (minor) * 100 + (patchlevel))) # if !MOZ_GCC_VERSION_AT_LEAST(4, 9, 0) # error "mfbt (and Goanna) require at least gcc 4.9 to build." # endif #elif defined(_MSC_VER) # undef MOZ_IS_MSVC # define MOZ_IS_MSVC 1 #endif /* * The situation with standard libraries is a lot worse than with compilers, * particularly as clang and gcc could end up using one of three or so standard * libraries, and they may not be up-to-snuff with newer C++11 versions. To * detect the library, we're going to include cstddef (which is a small header * which will be transitively included by everybody else at some point) to grab * the version macros and deduce macros from there. */ #ifdef __cplusplus # include <cstddef> # ifdef _STLPORT_MAJOR # define MOZ_USING_STLPORT 1 # define MOZ_STLPORT_VERSION_AT_LEAST(major, minor, patch) \ (_STLPORT_VERSION >= ((major) << 8 | (minor) << 4 | (patch))) # elif defined(_LIBCPP_VERSION) /* * libc++, unfortunately, doesn't appear to have useful versioning macros. * Hopefully, the recommendations of N3694 with respect to standard libraries * will get applied instead and we won't need to worry about version numbers * here. */ # define MOZ_USING_LIBCXX 1 # elif defined(__GLIBCXX__) # define MOZ_USING_LIBSTDCXX 1 /* * libstdc++ is also annoying and doesn't give us useful versioning macros * for the library. If we're using gcc, then assume that libstdc++ matches * the compiler version. If we're using clang, we're going to have to fake * major/minor combinations by looking for newly-defined config macros. */ # if MOZ_IS_GCC # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ MOZ_GCC_VERSION_AT_LEAST(major, minor, patch) # elif defined(_GLIBCXX_THROW_OR_ABORT) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 8)) # elif defined(_GLIBCXX_NOEXCEPT) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 7)) # elif defined(_GLIBCXX_USE_DEPRECATED) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 6)) # elif defined(_GLIBCXX_PSEUDO_VISIBILITY) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 5)) # elif defined(_GLIBCXX_BEGIN_EXTERN_C) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 4)) # elif defined(_GLIBCXX_VISIBILITY_ATTR) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 3)) # elif defined(_GLIBCXX_VISIBILITY) # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \ ((major) < 4 || ((major) == 4 && (minor) <= 2)) # else # error "Your version of libstdc++ is unknown to us and is likely too old." # endif # endif // Flesh out the defines for everyone else # ifndef MOZ_USING_STLPORT # define MOZ_USING_STLPORT 0 # define MOZ_STLPORT_VERSION_AT_LEAST(major, minor, patch) 0 # endif # ifndef MOZ_USING_LIBCXX # define MOZ_USING_LIBCXX 0 # endif # ifndef MOZ_USING_LIBSTDCXX # define MOZ_USING_LIBSTDCXX 0 # define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) 0 # endif #endif /* __cplusplus */ #endif /* mozilla_Compiler_h */