build/build_config.h

// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// 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
// Use TOOLKIT_GTK on linux if TOOLKIT_VIEWS isn't defined.
#if !defined(TOOLKIT_VIEWS)
#define TOOLKIT_GTK
#endif
#elif defined(_WIN32)
#define OS_WIN 1
#define TOOLKIT_VIEWS 1
#elif defined(__FreeBSD__)
#define OS_FREEBSD 1
#define TOOLKIT_GTK
#elif defined(__OpenBSD__)
#define OS_OPENBSD 1
#define TOOLKIT_GTK
#else
#error Please add support for your platform in build/build_config.h
#endif

// A flag derived from the above flags, used to cover GTK code in
// both TOOLKIT_GTK and TOOLKIT_VIEWS.
#if defined(TOOLKIT_GTK) || (defined(TOOLKIT_VIEWS) && !defined(OS_WIN))
#define TOOLKIT_USES_GTK 1
#endif

#if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_OPENBSD)
#define USE_NSS 1  // Use NSS for crypto.
#define USE_X11 1  // Use X for graphics.
#endif

// For access to standard POSIXish features, use OS_POSIX instead of a
// more specific macro.
#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_OPENBSD)
#define OS_POSIX 1
// Use base::DataPack for name/value pairs.
#define USE_BASE_DATA_PACK 1
#endif

// Use tcmalloc
#if defined(OS_WIN) && ! defined(NO_TCMALLOC)
#define USE_TCMALLOC 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
//   or with gcc, run: "echo | gcc -E -dM -"
#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
#elif defined(__ARMEL__)
#define ARCH_CPU_ARM_FAMILY 1
#define ARCH_CPU_ARMEL 1
#define ARCH_CPU_32_BITS 1
#define WCHAR_T_IS_UNSIGNED 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 || __WCHAR_MAX__ == 0xffffffff)
#define WCHAR_T_IS_UTF32
#elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
    defined(__WCHAR_MAX__) && \
    (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
// On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
// compile in this mode (in particular, Chrome doesn't). This is intended for
// other projects using base who manage their own dependencies and make sure
// short wchar works for them.
#define WCHAR_T_IS_UTF16
#else
#error Please add support for your compiler in build/build_config.h
#endif

#endif  // BUILD_BUILD_CONFIG_H_