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 // include a system header to pull in features.h for glibc/uclibc macros.
  34 #include <unistd.h>
  35 #if defined(__GLIBC__) && !defined(__UCLIBC__)
  36 // we really are using glibc, not uClibc pretending to be glibc
  37 #define LIBC_GLIBC 1
  38 #endif
  39 #elif defined(_WIN32)
  40 #define OS_WIN 1
  41 #define TOOLKIT_VIEWS 1
  42 #elif defined(__FreeBSD__)
  43 #define OS_FREEBSD 1
  44 #elif defined(__OpenBSD__)
  45 #define OS_OPENBSD 1
  46 #elif defined(__sun)
  47 #define OS_SOLARIS 1
  48 #elif defined(__QNXNTO__)
  49 #define OS_QNX 1
  50 #else
  51 #error Please add support for your platform in build/build_config.h
  52 #endif
  53
  54 #if defined(USE_OPENSSL) && defined(USE_NSS)
  55 #error Cannot use both OpenSSL and NSS
  56 #endif
  57
  58 // For access to standard BSD features, use OS_BSD instead of a
  59 // more specific macro.
  60 #if defined(OS_FREEBSD) || defined(OS_OPENBSD)
  61 #define OS_BSD 1
  62 #endif
  63
  64 // For access to standard POSIXish features, use OS_POSIX instead of a
  65 // more specific macro.
  66 #if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) ||     \
  67     defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(OS_ANDROID) ||  \
  68     defined(OS_NACL) || defined(OS_QNX)
  69 #define OS_POSIX 1
  70 #endif
  71
  72 // Use tcmalloc
  73 #if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
  74     !defined(NO_TCMALLOC)
  75 #define USE_TCMALLOC 1
  76 #endif
  77
  78 // Compiler detection.
  79 #if defined(__GNUC__)
  80 #define COMPILER_GCC 1
  81 #elif defined(_MSC_VER)
  82 #define COMPILER_MSVC 1
  83 #else
  84 #error Please add support for your compiler in build/build_config.h
  85 #endif
  86
  87 // Processor architecture detection.  For more info on what's defined, see:
  88 //   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
  89 //   http://www.agner.org/optimize/calling_conventions.pdf
  90 //   or with gcc, run: "echo | gcc -E -dM -"
  91 #if defined(_M_X64) || defined(__x86_64__)
  92 #define ARCH_CPU_X86_FAMILY 1
  93 #define ARCH_CPU_X86_64 1
  94 #define ARCH_CPU_64_BITS 1
  95 #define ARCH_CPU_LITTLE_ENDIAN 1
  96 #elif defined(_M_IX86) || defined(__i386__)
  97 #define ARCH_CPU_X86_FAMILY 1
  98 #define ARCH_CPU_X86 1
  99 #define ARCH_CPU_32_BITS 1
 100 #define ARCH_CPU_LITTLE_ENDIAN 1
 101 #elif defined(__ARMEL__)
 102 #define ARCH_CPU_ARM_FAMILY 1
 103 #define ARCH_CPU_ARMEL 1
 104 #define ARCH_CPU_32_BITS 1
 105 #define ARCH_CPU_LITTLE_ENDIAN 1
 106 #elif defined(__aarch64__)
 107 #define ARCH_CPU_ARM_FAMILY 1
 108 #define ARCH_CPU_ARM64 1
 109 #define ARCH_CPU_64_BITS 1
 110 #define ARCH_CPU_LITTLE_ENDIAN 1
 111 #elif defined(__pnacl__)
 112 #define ARCH_CPU_32_BITS 1
 113 #define ARCH_CPU_LITTLE_ENDIAN 1
 114 #elif defined(__MIPSEL__)
 115 #define ARCH_CPU_MIPS_FAMILY 1
 116 #define ARCH_CPU_MIPSEL 1
 117 #define ARCH_CPU_32_BITS 1
 118 #define ARCH_CPU_LITTLE_ENDIAN 1
 119 #else
 120 #error Please add support for your architecture in build/build_config.h
 121 #endif
 122
 123 // Type detection for wchar_t.
 124 #if defined(OS_WIN)
 125 #define WCHAR_T_IS_UTF16
 126 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 127     defined(__WCHAR_MAX__) && \
 128     (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
 129 #define WCHAR_T_IS_UTF32
 130 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 131     defined(__WCHAR_MAX__) && \
 132     (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
 133 // On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
 134 // compile in this mode (in particular, Chrome doesn't). This is intended for
 135 // other projects using base who manage their own dependencies and make sure
 136 // short wchar works for them.
 137 #define WCHAR_T_IS_UTF16
 138 #else
 139 #error Please add support for your compiler in build/build_config.h
 140 #endif
 141
 142 #if defined(OS_ANDROID)
 143 // The compiler thinks std::string::const_iterator and "const char*" are
 144 // equivalent types.
 145 #define STD_STRING_ITERATOR_IS_CHAR_POINTER
 146 // The compiler thinks base::string16::const_iterator and "char16*" are
 147 // equivalent types.
 148 #define BASE_STRING16_ITERATOR_IS_CHAR16_POINTER
 149 #endif
 150
 151 #endif  // BUILD_BUILD_CONFIG_H_