Add iOS support to common.gypi

build/build_config.h

 // 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)
 //  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_
 
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
 // A set of macros to use for platform detection.
 #if defined(__APPLE__)
 #define OS_MACOSX 1
+#if defined(TARGET_OS_IPHONE)
+#define OS_IOS 1
+#endif  // defined(TARGET_OS_IPHONE)
 #elif defined(ANDROID)
 #define OS_ANDROID 1
 #elif defined(__native_client__)
 #define OS_NACL 1
 #elif defined(__linux__)
 #define OS_LINUX 1
 // Use TOOLKIT_GTK on linux if TOOLKIT_VIEWS isn't defined.
 #if !defined(TOOLKIT_VIEWS)
 #define TOOLKIT_GTK
 #endif
@@ skipping 62 matching lines @@
 #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(__ARMEL__)
 #define ARCH_CPU_ARM_FAMILY 1
 #define ARCH_CPU_ARMEL 1
 #define ARCH_CPU_32_BITS 1
 #define ARCH_CPU_LITTLE_ENDIAN 1
-#define WCHAR_T_IS_UNSIGNED 1
 #elif defined(__pnacl__)
 #define ARCH_CPU_32_BITS 1
 #elif defined(__MIPSEL__)
 #define ARCH_CPU_MIPS_FAMILY 1
 #define ARCH_CPU_MIPSEL 1
 #define ARCH_CPU_32_BITS 1
 #define ARCH_CPU_LITTLE_ENDIAN 1
-#define WCHAR_T_IS_UNSIGNED 0
 #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(__ARMEL__) && !defined(OS_IOS)
+#define WCHAR_T_IS_UNSIGNED 1
+#elif defined(__MIPSEL__)
+#define WCHAR_T_IS_UNSIGNED 0
+#endif
+
 #if defined(OS_CHROMEOS)
 // Single define to trigger whether CrOS fonts have BCI on.
 // In that case font sizes/deltas should be adjusted.
 //define CROS_FONTS_USING_BCI
 #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_