text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  // This file adds defines about the platform we're currently building on.
  //  Operating System:
  //    OS_WIN / OS_MACOSX / OS_LINUX / OS_POSIX (MACOSX or LINUX) /
  //    OS_NACL (NACL_SFI or NACL_NONSFI) / OS_NACL_SFI / OS_NACL_NONSFI
  //  Compiler:
  //    COMPILER_MSVC / COMPILER_GCC
  //  Processor:
  //    ARCH_CPU_X86 / ARCH_CPU_X86_64 / ARCH_CPU_X86_FAMILY (X86 or X86_64)
  //    ARCH_CPU_32_BITS / ARCH_CPU_64_BITS
  
  #ifndef BUILD_BUILD_CONFIG_H_
  #define BUILD_BUILD_CONFIG_H_
  
  // A set of macros to use for platform detection.
  #if defined(__native_client__)
  // __native_client__ must be first, so that other OS_ defines are not set.
  #define OS_NACL 1
  // OS_NACL comes in two sandboxing technology flavors, SFI or Non-SFI.
  // PNaCl toolchain defines __native_client_nonsfi__ macro in Non-SFI build
  // mode, while it does not in SFI build mode.
  #if defined(__native_client_nonsfi__)
  #define OS_NACL_NONSFI
  #else
  #define OS_NACL_SFI
  #endif
  #elif defined(ANDROID)
  #define OS_ANDROID 1
  #elif defined(__APPLE__)
  // only include TargetConditions after testing ANDROID as some android builds
  // on mac don't have this header available and it's not needed unless the target
  // is really mac/ios.
  #include <TargetConditionals.h>
  #define OS_MACOSX 1
  #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
  #define OS_IOS 1
  #endif  // defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
  #elif defined(__linux__)
  #define OS_LINUX 1
  // include a system header to pull in features.h for glibc/uclibc macros.
  #include <unistd.h>
  #if defined(__GLIBC__) && !defined(__UCLIBC__)
  // we really are using glibc, not uClibc pretending to be glibc
  #define LIBC_GLIBC 1
  #endif
  #elif defined(_WIN32)
  #define OS_WIN 1
  #elif defined(__FreeBSD__)
  #define OS_FREEBSD 1
  #elif defined(__NetBSD__)
  #define OS_NETBSD 1
  #elif defined(__OpenBSD__)
  #define OS_OPENBSD 1
  #elif defined(__sun)
  #define OS_SOLARIS 1
  #elif defined(__QNXNTO__)
  #define OS_QNX 1
  #else
  #error Please add support for your platform in build/build_config.h
  #endif
  
  #if defined(USE_OPENSSL_CERTS) && defined(USE_NSS_CERTS)
  #error Cannot use both OpenSSL and NSS for certificates
  #endif
  
  // For access to standard BSD features, use OS_BSD instead of a
  // more specific macro.
  #if defined(OS_FREEBSD) || defined(OS_NETBSD) || defined(OS_OPENBSD)
  #define OS_BSD 1
  #endif
  
  // For access to standard POSIXish features, use OS_POSIX instead of a
  // more specific macro.
  #if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) ||     \
      defined(OS_NETBSD) || defined(OS_OPENBSD) || defined(OS_SOLARIS) ||   \
      defined(OS_ANDROID) || defined(OS_OPENBSD) || defined(OS_SOLARIS) ||  \
      defined(OS_ANDROID) || defined(OS_NACL) || defined(OS_QNX)
  #define OS_POSIX 1
  #endif
  
  // Use tcmalloc
  #if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
      !defined(NO_TCMALLOC)
  #define USE_TCMALLOC 1
  #endif
  
  // Compiler detection.
  #if defined(__GNUC__)
  #define COMPILER_GCC 1
  #elif defined(_MSC_VER)
  #define COMPILER_MSVC 1
  #else
  #error Please add support for your compiler in build/build_config.h
  #endif
  
  // Processor architecture detection.  For more info on what's defined, see:
  //   http://msdn.microsoft.com/en-us/library/b0084kay.aspx
  //   http://www.agner.org/optimize/calling_conventions.pdf
  //   or with gcc, run: "echo | gcc -E -dM -"
  #if defined(_M_X64) || defined(__x86_64__)
  #define ARCH_CPU_X86_FAMILY 1
  #define ARCH_CPU_X86_64 1
  #define ARCH_CPU_64_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #elif defined(_M_IX86) || defined(__i386__)
  #define ARCH_CPU_X86_FAMILY 1
  #define ARCH_CPU_X86 1
  #define ARCH_CPU_32_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #elif defined(__s390x__)
  #define ARCH_CPU_S390_FAMILY 1
  #define ARCH_CPU_S390X 1
  #define ARCH_CPU_64_BITS 1
  #define ARCH_CPU_BIG_ENDIAN 1
  #elif defined(__s390__)
  #define ARCH_CPU_S390_FAMILY 1
  #define ARCH_CPU_S390 1
  #define ARCH_CPU_31_BITS 1
  #define ARCH_CPU_BIG_ENDIAN 1
  #elif defined(__PPC64__) && defined(__BIG_ENDIAN__)
  #define ARCH_CPU_PPC64_FAMILY 1
  #define ARCH_CPU_PPC64 1
  #define ARCH_CPU_64_BITS 1
  #define ARCH_CPU_BIG_ENDIAN 1
  #elif defined(__PPC64__) && defined(__LITTLE_ENDIAN__)
  #define ARCH_CPU_PPC64_FAMILY 1
  #define ARCH_CPU_PPC64 1
  #define ARCH_CPU_64_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #elif defined(__PPC__)
  #define ARCH_CPU_PPC_FAMILY 1
  #define ARCH_CPU_PPC 1
  #define ARCH_CPU_32_BITS 1
  #define ARCH_CPU_BIG_ENDIAN 1
  #elif defined(__ARMEL__)
  #define ARCH_CPU_ARM_FAMILY 1
  #define ARCH_CPU_ARMEL 1
  #define ARCH_CPU_32_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #elif defined(__aarch64__)
  #define ARCH_CPU_ARM_FAMILY 1
  #define ARCH_CPU_ARM64 1
  #define ARCH_CPU_64_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #elif defined(__pnacl__)
  #define ARCH_CPU_32_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #elif defined(__MIPSEL__)
  #if defined(__LP64__)
  #define ARCH_CPU_MIPS_FAMILY 1
  #define ARCH_CPU_MIPS64EL 1
  #define ARCH_CPU_64_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #else
  #define ARCH_CPU_MIPS_FAMILY 1
  #define ARCH_CPU_MIPSEL 1
  #define ARCH_CPU_32_BITS 1
  #define ARCH_CPU_LITTLE_ENDIAN 1
  #endif
  #else
  #error Please add support for your architecture in build/build_config.h
  #endif
  
  // Type detection for wchar_t.
  #if defined(OS_WIN)
  #define WCHAR_T_IS_UTF16
  #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
      defined(__WCHAR_MAX__) && \
      (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
  #define WCHAR_T_IS_UTF32
  #elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
      defined(__WCHAR_MAX__) && \
      (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
  // On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
  // compile in this mode (in particular, Chrome doesn't). This is intended for
  // other projects using base who manage their own dependencies and make sure
  // short wchar works for them.
  #define WCHAR_T_IS_UTF16
  #else
  #error Please add support for your compiler in build/build_config.h
  #endif
  
  #if defined(OS_ANDROID)
  // The compiler thinks std::string::const_iterator and "const char*" are
  // equivalent types.
  #define STD_STRING_ITERATOR_IS_CHAR_POINTER
  // The compiler thinks base::string16::const_iterator and "char16*" are
  // equivalent types.
  #define BASE_STRING16_ITERATOR_IS_CHAR16_POINTER
  #endif
  
  #endif  // BUILD_BUILD_CONFIG_H_
  