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 #if defined(__GLIBC__) && !defined(__UCLIBC__)
  34 // we really are using glibc, not uClibc pretending to be glibc
  35 #define LIBC_GLIBC
  36 #endif
  37 #elif defined(_WIN32)
  38 #define OS_WIN 1
  39 #define TOOLKIT_VIEWS 1
  40 #elif defined(__FreeBSD__)
  41 #define OS_FREEBSD 1
  42 #elif defined(__OpenBSD__)
  43 #define OS_OPENBSD 1
  44 #elif defined(__sun)
  45 #define OS_SOLARIS 1
  46 #elif defined(__QNXNTO__)
  47 #define OS_QNX 1
  48 #else
  49 #error Please add support for your platform in build/build_config.h
  50 #endif
  51
  52 // Use TOOLKIT_GTK on X11 if TOOLKIT_VIEWS and USE_AURA aren't defined.
  53 #if defined(USE_X11) && !defined(TOOLKIT_VIEWS) && !defined(USE_AURA) && \
  54     !defined(OS_NACL)
  55 #define TOOLKIT_GTK
  56 #endif
  57
  58 #if defined(USE_OPENSSL) && defined(USE_NSS)
  59 #error Cannot use both OpenSSL and NSS
  60 #endif
  61
  62 // For access to standard BSD features, use OS_BSD instead of a
  63 // more specific macro.
  64 #if defined(OS_FREEBSD) || defined(OS_OPENBSD)
  65 #define OS_BSD 1
  66 #endif
  67
  68 // For access to standard POSIXish features, use OS_POSIX instead of a
  69 // more specific macro.
  70 #if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) ||     \
  71     defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(OS_ANDROID) ||  \
  72     defined(OS_NACL) || defined(OS_QNX)
  73 #define OS_POSIX 1
  74 #endif
  75
  76 // Use tcmalloc
  77 #if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
  78     !defined(NO_TCMALLOC)
  79 #define USE_TCMALLOC 1
  80 #endif
  81
  82 // Compiler detection.
  83 #if defined(__GNUC__)
  84 #define COMPILER_GCC 1
  85 #elif defined(_MSC_VER)
  86 #define COMPILER_MSVC 1
  87 #else
  88 #error Please add support for your compiler in build/build_config.h
  89 #endif
  90
  91 // Processor architecture detection.  For more info on what's defined, see:
  92 //   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
  93 //   http://www.agner.org/optimize/calling_conventions.pdf
  94 //   or with gcc, run: "echo | gcc -E -dM -"
  95 #if defined(_M_X64) || defined(__x86_64__)
  96 #define ARCH_CPU_X86_FAMILY 1
  97 #define ARCH_CPU_X86_64 1
  98 #define ARCH_CPU_64_BITS 1
  99 #define ARCH_CPU_LITTLE_ENDIAN 1
 100 #elif defined(_M_IX86) || defined(__i386__)
 101 #define ARCH_CPU_X86_FAMILY 1
 102 #define ARCH_CPU_X86 1
 103 #define ARCH_CPU_32_BITS 1
 104 #define ARCH_CPU_LITTLE_ENDIAN 1
 105 #elif defined(__ARMEL__)
 106 #define ARCH_CPU_ARM_FAMILY 1
 107 #define ARCH_CPU_ARMEL 1
 108 #define ARCH_CPU_32_BITS 1
 109 #define ARCH_CPU_LITTLE_ENDIAN 1
 110 #elif defined(__arm64__)
 111 #define ARCH_CPU_ARM_FAMILY 1
 112 #define ARCH_CPU_ARM64 1
 113 #define ARCH_CPU_64_BITS 1
 114 #define ARCH_CPU_LITTLE_ENDIAN 1
 115 #elif defined(__pnacl__)
 116 #define ARCH_CPU_32_BITS 1
 117 #define ARCH_CPU_LITTLE_ENDIAN 1
 118 #elif defined(__MIPSEL__)
 119 #define ARCH_CPU_MIPS_FAMILY 1
 120 #define ARCH_CPU_MIPSEL 1
 121 #define ARCH_CPU_32_BITS 1
 122 #define ARCH_CPU_LITTLE_ENDIAN 1
 123 #else
 124 #error Please add support for your architecture in build/build_config.h
 125 #endif
 126
 127 // Type detection for wchar_t.
 128 #if defined(OS_WIN)
 129 #define WCHAR_T_IS_UTF16
 130 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 131     defined(__WCHAR_MAX__) && \
 132     (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
 133 #define WCHAR_T_IS_UTF32
 134 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 135     defined(__WCHAR_MAX__) && \
 136     (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
 137 // On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
 138 // compile in this mode (in particular, Chrome doesn't). This is intended for
 139 // other projects using base who manage their own dependencies and make sure
 140 // short wchar works for them.
 141 #define WCHAR_T_IS_UTF16
 142 #else
 143 #error Please add support for your compiler in build/build_config.h
 144 #endif
 145
 146 #if defined(__ARMEL__) && !defined(OS_IOS)
 147 #define WCHAR_T_IS_UNSIGNED 1
 148 #elif defined(__MIPSEL__)
 149 #define WCHAR_T_IS_UNSIGNED 0
 150 #endif
 151
 152 #if defined(OS_ANDROID)
 153 // The compiler thinks std::string::const_iterator and "const char*" are
 154 // equivalent types.
 155 #define STD_STRING_ITERATOR_IS_CHAR_POINTER
 156 // The compiler thinks base::string16::const_iterator and "char16*" are
 157 // equivalent types.
 158 #define BASE_STRING16_ITERATOR_IS_CHAR16_POINTER
 159 #endif
 160
 161 #endif  // BUILD_BUILD_CONFIG_H_