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