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Diffstat (limited to 'include/onlineupdate/mozilla/Compiler.h')
| -rw-r--r-- | include/onlineupdate/mozilla/Compiler.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/include/onlineupdate/mozilla/Compiler.h b/include/onlineupdate/mozilla/Compiler.h new file mode 100644 index 000000000..6d6fcbbb1 --- /dev/null +++ b/include/onlineupdate/mozilla/Compiler.h @@ -0,0 +1,110 @@ +/* -*- 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 MOS_IS_MSVC 0 + +#if !defined(__clang__) && defined(__GNUC__) + +# undef MOZ_IS_GCC +# define MOZ_IS_GCC 1 + /* + * This macro 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))) +# if !MOZ_GCC_VERSION_AT_LEAST(4, 7, 0) +# error "mfbt (and Gecko) require at least gcc 4.7 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 */ |