Revert "Make RelativePath use abspath rather than realpath for the 'path' variable."

pylib/gyp/common.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.
 
 from __future__ import with_statement
 
 import collections
 import errno
 import filecmp
 import os.path
@@ skipping 119 matching lines @@
   return fully_qualified
 
 
 @memoize
 def RelativePath(path, relative_to):
   # Assuming both |path| and |relative_to| are relative to the current
   # directory, returns a relative path that identifies path relative to
   # relative_to.
 
   # Convert to normalized (and therefore absolute paths).
-  path = os.path.abspath(path)
+  path = os.path.realpath(path)
   relative_to = os.path.realpath(relative_to)
 
   # On Windows, we can't create a relative path to a different drive, so just
   # use the absolute path.
   if sys.platform == 'win32':
     if (os.path.splitdrive(path)[0].lower() !=
         os.path.splitdrive(relative_to)[0].lower()):
       return path
 
   # Split the paths into components.
@@ skipping 439 matching lines @@
 def CrossCompileRequested():
   # TODO: figure out how to not build extra host objects in the
   # non-cross-compile case when this is enabled, and enable unconditionally.
   return (os.environ.get('GYP_CROSSCOMPILE') or
           os.environ.get('AR_host') or
           os.environ.get('CC_host') or
           os.environ.get('CXX_host') or
           os.environ.get('AR_target') or
           os.environ.get('CC_target') or
           os.environ.get('CXX_target'))