Use plain gcc.

client/dom/scripts/idlparser.py

 #!/usr/bin/python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 import re
 import subprocess
 import tempfile
 
 from pegparser import *
@@ skipping 393 matching lines @@
 
     Returns:
       The result of running gcc on the content.
 
     Args:
       content -- text to process.
       defines -- an array of pre-processor defines.
       includePaths -- an array of path strings.
     """
     # FIXME: Handle gcc not found, or any other processing errors
-    gcc = '/usr/bin/gcc'
+    gcc = 'gcc'
     cmd = [gcc, '-E', '-P', '-C', '-x', 'c++'];
     for define in defines:
       cmd.append('-D%s' % define)
     cmd.append('-')
     pipe = subprocess.Popen(cmd, stdin=subprocess.PIPE,
       stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     (content, stderr) = pipe.communicate(content)
     return content
 
   def parse(self, content, defines=[], includePaths=[]):
     """Parse the give content string.
 
     The WebKit IDL syntax also allows gcc pre-processing instructions.
     Lists of defined variables and include paths can be provided.
 
     Returns:
       An abstract syntax tree (AST).
 
     Args:
       content -- text to parse.
       defines -- an array of pre-processor defines.
       includePaths -- an array of path strings used by the
         gcc pre-processor.
     """
     if self._syntax == WEBKIT_SYNTAX:
       content = self._pre_process(content, defines, includePaths)
 
     return self._pegparser.parse(content)