Don't build with exception support, we don't use exceptions.

src/build/SConscript.main

 # Copyright (c) 2006-2008 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.
 
 import os
 import shutil
 import sys
 
 
 p = ARGUMENTS.get('PROGRESS')
@@ skipping 455 matching lines @@
 excluded_warnings = [
   # TODO: Clean up uses of ext/hash_map and remove this.
   # (see unordered_map and base/hash_tables.h)
   '-Wno-deprecated',  # Needed for using ext/hash_map on GCC 4.3
   '-Wno-unknown-pragmas',  # In wtf's ref counting system
 ]
 linux_env.Append(
     BUILD_SCONSCRIPTS = [
         '$LIBEVENT_DIR/libevent.scons',
     ],
-    CCFLAGS = ['-m32', '-pthread', '-march=i686'],
+    CCFLAGS = ['-m32', '-pthread', '-march=i686', '-fno-exceptions'],
     CXXFLAGS = ['-Wall', '-Werror', '-march=i686'] + excluded_warnings,
     LINKFLAGS = ['-m32', '-pthread'],
 )
 
 linux_env.Replace(
     # Linking of large files uses lots of RAM, so serialize links
     # using the handy flock command from util-linux.
     LINK = 'flock $TARGET_ROOT/linker.lock ' + linux_env['LINK'],
 
     # We have several cases where archives depend on each other in a cyclic
@@ skipping 302 matching lines @@
         'all_libraries',
         'all_languages',
         'all_programs',
         'all_test_programs',
     ], projects = [p],
     COMPONENT_VS_PROJECT_SCRIPT_PATH=(
         'cd $$(ProjectDir)/$VS_PROJECT_TO_MAIN_DIR && hammer.bat'),
 )
 
 # -------------------------------------------------------------------------