chromium-src-build/build_config.h

// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * 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.
//    * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
// OWNER 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
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// This file adds defines about the platform we're currently building on.
//  Operating System:
//    OS_WIN / OS_MACOSX / OS_LINUX / OS_POSIX (MACOSX or LINUX)
//  Compiler:
//    COMPILER_MSVC / COMPILER_GCC
//  Processor:
//    ARCH_CPU_X86 / ARCH_CPU_X86_64 / ARCH_CPU_X86_FAMILY (X86 or X86_64)
//    ARCH_CPU_32_BITS / ARCH_CPU_64_BITS

#ifndef BUILD_BUILD_CONFIG_H_
#define BUILD_BUILD_CONFIG_H_

// A set of macros to use for platform detection.
#if defined(__APPLE__)
#define OS_MACOSX 1
#elif defined(__linux__)
#define OS_LINUX 1
#elif defined(WIN32)
#define OS_WIN 1
#else
#error Please add support for your platform in build/build_config.h
#endif

// For access to standard POSIX features, use OS_POSIX instead of a more
// specific macro.
#if defined(OS_MACOSX) || defined(OS_LINUX)
#define OS_POSIX 1
#endif

// Compiler detection.
#if defined(__GNUC__)
#define COMPILER_GCC 1
#elif defined(_MSC_VER)
#define COMPILER_MSVC 1
#else
#error Please add support for your compiler in build/build_config.h
#endif

// Processor architecture detection.  For more info on what's defined, see:
//   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
//   http://www.agner.org/optimize/calling_conventions.pdf
#if defined(_M_X64) || defined(__x86_64__)
#define ARCH_CPU_X86_FAMILY 1
#define ARCH_CPU_X86_64 1
#define ARCH_CPU_64_BITS 1
#elif defined(_M_IX86) || defined(__i386__)
#define ARCH_CPU_X86_FAMILY 1
#define ARCH_CPU_X86 1
#define ARCH_CPU_32_BITS 1
#else
#error Please add support for your architecture in build/build_config.h
#endif

// Type detection for wchar_t.
#if defined(OS_WIN)
#define WCHAR_T_IS_UTF16
#elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
    defined(__WCHAR_MAX__) && __WCHAR_MAX__ == 0x7fffffff
#define WCHAR_T_IS_UTF32
#else
#error Please add support for your compiler in build/build_config.h
#endif

#endif  // BUILD_BUILD_CONFIG_H_