Serialize links on Linux. Should fix http://code.google.com/p/chromium/issue...

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 441 matching lines @@
 linux_env.Append(
     BUILD_SCONSCRIPTS = [
         '$LIBEVENT_DIR/libevent.scons',
     ],
     CCFLAGS = ['-m32', '-g', '-pthread'],
     CXXFLAGS = ['-Wall', '-Werror'] + 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 ' + linux_env['TARGET_ROOT'] + '/linker.lock ' + linux_env['LINK'],

[Evan Martin, 2008/11/10 22:00:16]

I wonder if you can get away with the "$FOO" pattern used in the commands
nearby?

+
     # We have several cases where archives depend on each other in a cyclic
     # fashion. (V8Bindings, libport and WebCore being the most significant
     # example.) Since the GNU linker does only a single pass over the archives
     # we need some extra trickery to deal with these unavoidable cycles. That
     # trickery is --start-group and --end-group (aka -( and -) ). That causes ld
     # to loop over the group until no more undefined symbols are found. In an
     # ideal world we would only make groups from those libraries which we knew
     # to be in cycles. However, that's tough with SCons, so we bodge it by
     # making all the archives a group by redefining the linking command here.
     SHLINKCOM = ('$SHLINK -shared -o $TARGET $SHLINKFLAGS $SOURCES '
@@ skipping 220 matching lines @@
       COMPONENT_VS_SOLUTION_DIR='$MAIN_DIR',
       COMPONENT_VS_PROJECT_DIR='$MAIN_DIR/projects',
       COMPONENT_VS_PROJECT_SCRIPT_PATH=(
         'cd $$(ProjectDir)/$VS_PROJECT_TO_MAIN_DIR && hammer.bat'),
   )
 
   Default(None)  # Delete all other default targets.
   Default([src_solution, solution])  # Build just the solution.
 
 # -------------------------------------------------------------------------