build/build_config.h

   1 // Copyright (c) 2012 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 #if defined(__APPLE__)
  18 #include <TargetConditionals.h>
  19 #endif
  20
  21 // A set of macros to use for platform detection.
  22 #if defined(ANDROID)
  23 #define OS_ANDROID 1
  24 #elif defined(__APPLE__)
  25 #define OS_MACOSX 1
  26 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
  27 #define OS_IOS 1
  28 #endif  // defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
  29 #elif defined(__native_client__)
  30 #define OS_NACL 1
  31 #elif defined(__linux__)
  32 #define OS_LINUX 1
  33 // Use TOOLKIT_GTK on linux if TOOLKIT_VIEWS isn't defined.
  34 #if !defined(TOOLKIT_VIEWS) && defined(USE_X11) && !defined(USE_AURA)
  35 #define TOOLKIT_GTK
  36 #endif
  37 #if defined(__GLIBC__) && !defined(__UCLIBC__)
  38 // we really are using glibc, not uClibc pretending to be glibc
  39 #define LIBC_GLIBC
  40 #endif
  41 #elif defined(_WIN32)
  42 #define OS_WIN 1
  43 #define TOOLKIT_VIEWS 1
  44 #elif defined(__FreeBSD__)
  45 #define OS_FREEBSD 1
  46 #define TOOLKIT_GTK
  47 #elif defined(__OpenBSD__)
  48 #define OS_OPENBSD 1
  49 #define TOOLKIT_GTK
  50 #elif defined(__sun)
  51 #define OS_SOLARIS 1
  52 #define TOOLKIT_GTK
  53 #else
  54 #error Please add support for your platform in build/build_config.h
  55 #endif
  56
  57 #if defined(USE_OPENSSL) && defined(USE_NSS)
  58 #error Cannot use both OpenSSL and NSS
  59 #endif
  60
  61 // For access to standard BSD features, use OS_BSD instead of a
  62 // more specific macro.
  63 #if defined(OS_FREEBSD) || defined(OS_OPENBSD)
  64 #define OS_BSD 1
  65 #endif
  66
  67 // For access to standard POSIXish features, use OS_POSIX instead of a
  68 // more specific macro.
  69 #if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) ||     \
  70     defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(OS_ANDROID) ||  \
  71     defined(OS_NACL)
  72 #define OS_POSIX 1
  73 #endif
  74
  75 // Use tcmalloc
  76 #if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
  77     !defined(NO_TCMALLOC)
  78 #define USE_TCMALLOC 1
  79 #endif
  80
  81 // Compiler detection.
  82 #if defined(__GNUC__)
  83 #define COMPILER_GCC 1
  84 #elif defined(_MSC_VER)
  85 #define COMPILER_MSVC 1
  86 #else
  87 #error Please add support for your compiler in build/build_config.h
  88 #endif
  89
  90 // Processor architecture detection.  For more info on what's defined, see:
  91 //   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
  92 //   http://www.agner.org/optimize/calling_conventions.pdf
  93 //   or with gcc, run: "echo | gcc -E -dM -"
  94 #if defined(_M_X64) || defined(__x86_64__)
  95 #define ARCH_CPU_X86_FAMILY 1
  96 #define ARCH_CPU_X86_64 1
  97 #define ARCH_CPU_64_BITS 1
  98 #define ARCH_CPU_LITTLE_ENDIAN 1
  99 #elif defined(_M_IX86) || defined(__i386__)
 100 #define ARCH_CPU_X86_FAMILY 1
 101 #define ARCH_CPU_X86 1
 102 #define ARCH_CPU_32_BITS 1
 103 #define ARCH_CPU_LITTLE_ENDIAN 1
 104 #elif defined(__ARMEL__)
 105 #define ARCH_CPU_ARM_FAMILY 1
 106 #define ARCH_CPU_ARMEL 1
 107 #define ARCH_CPU_32_BITS 1
 108 #define ARCH_CPU_LITTLE_ENDIAN 1
 109 #elif defined(__pnacl__)
 110 #define ARCH_CPU_32_BITS 1
 111 #define ARCH_CPU_LITTLE_ENDIAN 1
 112 #elif defined(__MIPSEL__)
 113 #define ARCH_CPU_MIPS_FAMILY 1
 114 #define ARCH_CPU_MIPSEL 1
 115 #define ARCH_CPU_32_BITS 1
 116 #define ARCH_CPU_LITTLE_ENDIAN 1
 117 #else
 118 #error Please add support for your architecture in build/build_config.h
 119 #endif
 120
 121 // Type detection for wchar_t.
 122 #if defined(OS_WIN)
 123 #define WCHAR_T_IS_UTF16
 124 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 125     defined(__WCHAR_MAX__) && \
 126     (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
 127 #define WCHAR_T_IS_UTF32
 128 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 129     defined(__WCHAR_MAX__) && \
 130     (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
 131 // On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
 132 // compile in this mode (in particular, Chrome doesn't). This is intended for
 133 // other projects using base who manage their own dependencies and make sure
 134 // short wchar works for them.
 135 #define WCHAR_T_IS_UTF16
 136 #else
 137 #error Please add support for your compiler in build/build_config.h
 138 #endif
 139
 140 #if defined(__ARMEL__) && !defined(OS_IOS)
 141 #define WCHAR_T_IS_UNSIGNED 1
 142 #elif defined(__MIPSEL__)
 143 #define WCHAR_T_IS_UNSIGNED 0
 144 #endif
 145
 146 #if defined(OS_ANDROID)
 147 // The compiler thinks std::string::const_iterator and "const char*" are
 148 // equivalent types.
 149 #define STD_STRING_ITERATOR_IS_CHAR_POINTER
 150 // The compiler thinks base::string16::const_iterator and "char16*" are
 151 // equivalent types.
 152 #define BASE_STRING16_ITERATOR_IS_CHAR16_POINTER
 153 #endif
 154
 155 #endif  // BUILD_BUILD_CONFIG_H_