Non-SFI NaCl: Filter out all optimization flags for libc_free.c

chrome/test/data/nacl/nacl_test_data.gyp

 # 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.
 
 {
   'includes': [
     '../../../../ppapi/ppapi_nacl_test_common.gypi',
   ],
   'targets': [
     {
@@ skipping 1162 matching lines @@
             '-O0',
           ],
           'cflags!': [
             # We filter these out because release_extra_cflags or another
             # such thing might be adding them in, and those options wind up
             # coming after the -fno-stack-protector we added above.
             '-fstack-protector',
             '-fstack-protector-all',
             '-fprofile-generate',
             '-finstrument-functions',
-            '-O2',
             # ARM GCC emits symbols like __aeabi_unwind_cpp_pr0 in
             # .exidx sections with this flag.
             '-funwind-tables',
           ],
           'ldflags': [
             '-nostdlib',
             '-shared',
             # This binary cannot relocate itself, so we should have no
             # undefined references left.
             '-Wl,--no-undefined',
           ],
           'ldflags!': [
             # Explicitly remove the -pthread flag to avoid a link time warning.
             '-pthread',
           ],
           # Do not use any sanitizers tools, which require a few symbols.
           'cflags/': [
             ['exclude', '-fsanitize'],
+            ['exclude', '^-O'],  # Strip -O2, -Os etc.
           ],
           'ldflags/': [
             ['exclude', '-fsanitize'],
           ],
           'defines': [
             # The code depends on NaCl's headers. This is a macro for them.
             'NACL_LINUX=1',
           ],
           # For native_client/src/include/...
           'include_dirs': [
@@ skipping 42 matching lines @@
               'files': [
                 '>@(test_files)',
               ],
             },
           ],
         },
       ],
     }],
   ],
 }