mac make&ninja: Support GCC_CHAR_IS_UNSIGNED_CHAR.

pylib/gyp/xcode_emulation.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 This module contains classes that help to emulate xcodebuild behavior on top of
 other build systems, such as make and ninja.
 """
 
 import gyp.common
@@ skipping 216 matching lines @@
     # This functions (and the similar ones below) do not offer complete
     # emulation of all xcode_settings keys. They're implemented on demand.
 
     self.configname = configname
     cflags = []
 
     sdk_root = self._SdkPath()
     if 'SDKROOT' in self._Settings():
       cflags.append('-isysroot %s' % sdk_root)
 
+    if self._Test('GCC_CHAR_IS_UNSIGNED_CHAR', 'YES', default='NO'):
+      cflags.append('-funsigned-char')
+
     if self._Test('GCC_CW_ASM_SYNTAX', 'YES', default='YES'):
       cflags.append('-fasm-blocks')
 
     if 'GCC_DYNAMIC_NO_PIC' in self._Settings():
       if self._Settings()['GCC_DYNAMIC_NO_PIC'] == 'YES':
         cflags.append('-mdynamic-no-pic')
     else:
       pass
       # TODO: In this case, it depends on the target. xcode passes
       # mdynamic-no-pic by default for executable and possibly static lib
@@ skipping 697 matching lines @@
     # absolutified. Else, it's in the PATH (e.g. install_name_tool, ln).
     if os.path.sep in shell_list[0]:
       shell_list[0] = gyp_path_to_build_path(shell_list[0])
 
       # "script.sh" -> "./script.sh"
       if not os.path.sep in shell_list[0]:
         shell_list[0] = os.path.join('.', shell_list[0])
     postbuilds.append(gyp.common.EncodePOSIXShellList(shell_list))
 
   return postbuilds