<tools/gyp> Add support for libc++ to xcode_emulation.py

Change-Id: Ifbe063950d14d8388e3c8c1d6cebdfae5cbdb8ae
Reviewed-by: Zeno Albisser <[email protected]>
Reviewed-by: Andras Becsi <[email protected]>

Author: zenoalbisser

chromium/tools/gyp/pylib/gyp/xcode_emulation.py

@@ -609,6 +609,9 @@ def GetLdflags(self, configname, product_dir, gyp_to_build_path, arch=None):
     for ldflag in self._Settings().get('OTHER_LDFLAGS', []):
       ldflags.append(self._MapLinkerFlagFilename(ldflag, gyp_to_build_path))
 
+    if self._Test('USE_LIBCPP', 'YES', default='NO'):
+      ldflags.append('-stdlib=libc++')
+
     if self._Test('DEAD_CODE_STRIPPING', 'YES', default='NO'):
       ldflags.append('-Wl,-dead_strip')