build_config.h revision 2f7cea8af61f1126d50e0749f4ced7844b14f5b4 
1// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// This file adds defines about the platform we're currently building on.
6//  Operating System:
7//    OS_WIN / OS_MACOSX / OS_LINUX / OS_POSIX (MACOSX or LINUX)
8//  Compiler:
9//    COMPILER_MSVC / COMPILER_GCC
10//  Processor:
11//    ARCH_CPU_X86 / ARCH_CPU_X86_64 / ARCH_CPU_X86_FAMILY (X86 or X86_64)
12//    ARCH_CPU_32_BITS / ARCH_CPU_64_BITS
13
14#ifndef BUILD_BUILD_CONFIG_H_
15#define BUILD_BUILD_CONFIG_H_
16
17// A set of macros to use for platform detection.
18#if defined(__APPLE__)
19#define OS_MACOSX 1
20#elif defined(__linux__)
21#define OS_LINUX 1
22// Use TOOLKIT_GTK on linux if TOOLKIT_VIEWS isn't defined.
23#if !defined(TOOLKIT_VIEWS)
24#define TOOLKIT_GTK
25#endif
26#elif defined(_WIN32)
27#define OS_WIN 1
28#define TOOLKIT_VIEWS 1
29#elif defined(__FreeBSD__)
30#define OS_FREEBSD 1
31#define TOOLKIT_GTK
32#elif defined(__OpenBSD__)
33#define OS_OPENBSD 1
34#define TOOLKIT_GTK
35#else
36#error Please add support for your platform in build/build_config.h
37#endif
38
39// A flag derived from the above flags, used to cover GTK code in
40// both TOOLKIT_GTK and TOOLKIT_VIEWS.
41#if defined(TOOLKIT_GTK) || (defined(TOOLKIT_VIEWS) && !defined(OS_WIN))
42#define TOOLKIT_USES_GTK 1
43#endif
44
45#if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_OPENBSD)
46#define USE_NSS 1  // Use NSS for crypto.
47#define USE_X11 1  // Use X for graphics.
48#endif
49
50#if defined(ANDROID)
51#define USE_OPENSSL 1
52#undef USE_NSS
53#define USE_SYSTEM_ZLIB 1
54#endif
55
56// For access to standard POSIXish features, use OS_POSIX instead of a
57// more specific macro.
58#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) || \
59    defined(OS_OPENBSD)
60#define OS_POSIX 1
61// Use base::DataPack for name/value pairs.
62#define USE_BASE_DATA_PACK 1
63#endif
64
65// Use tcmalloc
66#if defined(OS_WIN) && !defined(NO_TCMALLOC)
67#define USE_TCMALLOC 1
68#endif
69
70// Compiler detection.
71#if defined(__GNUC__)
72#define COMPILER_GCC 1
73#elif defined(_MSC_VER)
74#define COMPILER_MSVC 1
75#else
76#error Please add support for your compiler in build/build_config.h
77#endif
78
79// Processor architecture detection.  For more info on what's defined, see:
80//   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
81//   http://www.agner.org/optimize/calling_conventions.pdf
82//   or with gcc, run: "echo | gcc -E -dM -"
83#if defined(_M_X64) || defined(__x86_64__)
84#define ARCH_CPU_X86_FAMILY 1
85#define ARCH_CPU_X86_64 1
86#define ARCH_CPU_64_BITS 1
87#elif defined(_M_IX86) || defined(__i386__)
88#define ARCH_CPU_X86_FAMILY 1
89#define ARCH_CPU_X86 1
90#define ARCH_CPU_32_BITS 1
91#elif defined(__ARMEL__)
92#define ARCH_CPU_ARM_FAMILY 1
93#define ARCH_CPU_ARMEL 1
94#define ARCH_CPU_32_BITS 1
95#define WCHAR_T_IS_UNSIGNED 1
96#else
97#error Please add support for your architecture in build/build_config.h
98#endif
99
100// Type detection for wchar_t.
101#if defined(OS_WIN)
102#define WCHAR_T_IS_UTF16
103#elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
104    defined(__WCHAR_MAX__) && \
105    (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
106#define WCHAR_T_IS_UTF32
107#elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
108    defined(__WCHAR_MAX__) && \
109    (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
110// On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
111// compile in this mode (in particular, Chrome doesn't). This is intended for
112// other projects using base who manage their own dependencies and make sure
113// short wchar works for them.
114#define WCHAR_T_IS_UTF16
115#else
116#error Please add support for your compiler in build/build_config.h
117#endif
118
119#endif  // BUILD_BUILD_CONFIG_H_
120