Remove -Wno-unknown-pragmas from global compiler flags on Linux.

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
 
 
 if sys.platform == 'win32':
@@ skipping 387 matching lines @@
 for envvar in ('HOME', 'DISTCC_DIR', 'DISTCC_HOSTS', 'CCACHE_DIR',
                'INTERCEPTOR_SOCKET', 'ENFORGE_DIGEST_CACHE',
                'ENFORGE_CACHE_HOST', 'ENFORGE_CACHE_PORT'):
   if envvar in os.environ:
     linux_env['ENV'][envvar] = os.environ[envvar]
 
 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', '-fno-exceptions'],
     CXXFLAGS = ['-Wall', '-Werror', '-march=i686'] + excluded_warnings,
     LINKFLAGS = ['-m32', '-pthread'],
 )
 
@@ skipping 298 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'),
 )
 
 # -------------------------------------------------------------------------