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 //    OS_NACL (NACL_SFI or NACL_NONSFI) / OS_NACL_SFI / OS_NACL_NONSFI
   9 //  Compiler:
  10 //    COMPILER_MSVC / COMPILER_GCC
  11 //  Processor:
  12 //    ARCH_CPU_X86 / ARCH_CPU_X86_64 / ARCH_CPU_X86_FAMILY (X86 or X86_64)
  13 //    ARCH_CPU_32_BITS / ARCH_CPU_64_BITS
  14
  15 #ifndef BUILD_BUILD_CONFIG_H_
  16 #define BUILD_BUILD_CONFIG_H_
  17
  18 // A set of macros to use for platform detection.
  19 #if defined(__native_client__)
  20 // __native_client__ must be first, so that other OS_ defines are not set.
  21 #define OS_NACL 1
  22 // OS_NACL comes in two sandboxing technology flavors, SFI or Non-SFI.
  23 // PNaCl toolchain defines __native_client_nonsfi__ macro in Non-SFI build
  24 // mode, while it does not in SFI build mode.
  25 #if defined(__native_client_nonsfi__)
  26 #define OS_NACL_NONSFI
  27 #else
  28 #define OS_NACL_SFI
  29 #endif
  30 #elif defined(ANDROID)
  31 #define OS_ANDROID 1
  32 #elif defined(__APPLE__)
  33 // only include TargetConditions after testing ANDROID as some android builds
  34 // on mac don't have this header available and it's not needed unless the target
  35 // is really mac/ios.
  36 #include <TargetConditionals.h>
  37 #define OS_MACOSX 1
  38 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
  39 #define OS_IOS 1
  40 #endif  // defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
  41 #elif defined(__linux__)
  42 #define OS_LINUX 1
  43 // include a system header to pull in features.h for glibc/uclibc macros.
  44 #include <unistd.h>
  45 #if defined(__GLIBC__) && !defined(__UCLIBC__)
  46 // we really are using glibc, not uClibc pretending to be glibc
  47 #define LIBC_GLIBC 1
  48 #endif
  49 #elif defined(_WIN32)
  50 #define OS_WIN 1
  51 #define TOOLKIT_VIEWS 1
  52 #elif defined(__FreeBSD__)
  53 #define OS_FREEBSD 1
  54 #elif defined(__OpenBSD__)
  55 #define OS_OPENBSD 1
  56 #elif defined(__sun)
  57 #define OS_SOLARIS 1
  58 #elif defined(__QNXNTO__)
  59 #define OS_QNX 1
  60 #else
  61 #error Please add support for your platform in build/build_config.h
  62 #endif
  63
  64 #if defined(USE_OPENSSL_CERTS) && defined(USE_NSS_CERTS)
  65 #error Cannot use both OpenSSL and NSS for certificates
  66 #endif
  67
  68 // For access to standard BSD features, use OS_BSD instead of a
  69 // more specific macro.
  70 #if defined(OS_FREEBSD) || defined(OS_OPENBSD)
  71 #define OS_BSD 1
  72 #endif
  73
  74 // For access to standard POSIXish features, use OS_POSIX instead of a
  75 // more specific macro.
  76 #if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) ||     \
  77     defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(OS_ANDROID) ||  \
  78     defined(OS_NACL) || defined(OS_QNX)
  79 #define OS_POSIX 1
  80 #endif
  81
  82 // Use tcmalloc
  83 #if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
  84     !defined(NO_TCMALLOC)
  85 #define USE_TCMALLOC 1
  86 #endif
  87
  88 // Compiler detection.
  89 #if defined(__GNUC__)
  90 #define COMPILER_GCC 1
  91 #elif defined(_MSC_VER)
  92 #define COMPILER_MSVC 1
  93 #else
  94 #error Please add support for your compiler in build/build_config.h
  95 #endif
  96
  97 // Processor architecture detection.  For more info on what's defined, see:
  98 //   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
  99 //   http://www.agner.org/optimize/calling_conventions.pdf
 100 //   or with gcc, run: "echo | gcc -E -dM -"
 101 #if defined(_M_X64) || defined(__x86_64__)
 102 #define ARCH_CPU_X86_FAMILY 1
 103 #define ARCH_CPU_X86_64 1
 104 #define ARCH_CPU_64_BITS 1
 105 #define ARCH_CPU_LITTLE_ENDIAN 1
 106 #elif defined(_M_IX86) || defined(__i386__)
 107 #define ARCH_CPU_X86_FAMILY 1
 108 #define ARCH_CPU_X86 1
 109 #define ARCH_CPU_32_BITS 1
 110 #define ARCH_CPU_LITTLE_ENDIAN 1
 111 #elif defined(__ARMEL__)
 112 #define ARCH_CPU_ARM_FAMILY 1
 113 #define ARCH_CPU_ARMEL 1
 114 #define ARCH_CPU_32_BITS 1
 115 #define ARCH_CPU_LITTLE_ENDIAN 1
 116 #elif defined(__aarch64__)
 117 #define ARCH_CPU_ARM_FAMILY 1
 118 #define ARCH_CPU_ARM64 1
 119 #define ARCH_CPU_64_BITS 1
 120 #define ARCH_CPU_LITTLE_ENDIAN 1
 121 #elif defined(__pnacl__)
 122 #define ARCH_CPU_32_BITS 1
 123 #define ARCH_CPU_LITTLE_ENDIAN 1
 124 #elif defined(__MIPSEL__)
 125 #if defined(__LP64__)
 126 #define ARCH_CPU_MIPS64_FAMILY 1
 127 #define ARCH_CPU_MIPS64EL 1
 128 #define ARCH_CPU_64_BITS 1
 129 #define ARCH_CPU_LITTLE_ENDIAN 1
 130 #else
 131 #define ARCH_CPU_MIPS_FAMILY 1
 132 #define ARCH_CPU_MIPSEL 1
 133 #define ARCH_CPU_32_BITS 1
 134 #define ARCH_CPU_LITTLE_ENDIAN 1
 135 #endif
 136 #else
 137 #error Please add support for your architecture in build/build_config.h
 138 #endif
 139
 140 // Type detection for wchar_t.
 141 #if defined(OS_WIN)
 142 #define WCHAR_T_IS_UTF16
 143 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 144     defined(__WCHAR_MAX__) && \
 145     (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
 146 #define WCHAR_T_IS_UTF32
 147 #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
 148     defined(__WCHAR_MAX__) && \
 149     (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
 150 // On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
 151 // compile in this mode (in particular, Chrome doesn't). This is intended for
 152 // other projects using base who manage their own dependencies and make sure
 153 // short wchar works for them.
 154 #define WCHAR_T_IS_UTF16
 155 #else
 156 #error Please add support for your compiler in build/build_config.h
 157 #endif
 158
 159 #if defined(OS_ANDROID)
 160 // The compiler thinks std::string::const_iterator and "const char*" are
 161 // equivalent types.
 162 #define STD_STRING_ITERATOR_IS_CHAR_POINTER
 163 // The compiler thinks base::string16::const_iterator and "char16*" are
 164 // equivalent types.
 165 #define BASE_STRING16_ITERATOR_IS_CHAR16_POINTER
 166 #endif
 167
 168 #endif  // BUILD_BUILD_CONFIG_H_