[NaCl SDK] nacl_io: Add flow control the JavaScript pipes.

native_client_sdk/src/resources/Makefile.example.template

 # Copyright (c) 2013 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.
 
 # GNU Makefile based on shared rules provided by the Native Client SDK.
 # See README.Makefiles for more details.
 [[]]
 [[def ExpandDict(key, value_in, pre_list=[], post_list=[]):]]
 [[  value = value_in or [] ]]
 [[  pre = pre_list or [] ]]
@@ skipping 54 matching lines @@
 [[  source_list = ' \\\n  '.join(source_list)]]
 [[  sources = target['NAME'] + '_SOURCES']]
 [[  cflags = target['NAME'] + '_CFLAGS']]
 [[  flags = target.get('CFLAGS', [])]]
 [[  flags.extend(target.get('CXXFLAGS', []))]]
 [[  if len(targets) == 1:]]
 [[    sources = 'SOURCES']]
 [[    cflags = 'CFLAGS']]
 [[  ]]
 [[  ExpandDict(cflags, flags)]]
+[[  for define in target.get('DEFINES', []):]]
+{{cflags}} += -D{{define}}
+[[  ]]
 [[  if 'CFLAGS_GCC' in target:]]
 ifneq ($(TOOLCHAIN),pnacl)
 {{cflags}} += {{' '.join(target['CFLAGS_GCC'])}}
 endif
 [[  ]]
+[[]]
 {{sources}} = {{source_list}}
 
+
 # Build rules generated by macros from common.mk:
 
 [[if targets[0].get('DEPS'):]]
 $(foreach dep,$(DEPS),$(eval $(call DEPEND_RULE,$(dep))))
 [[if len(targets) > 1:]]
 [[  for target in targets:]]
 [[    name = target['NAME'] ]]
 $(foreach src,$({{name}}_SOURCES),$(eval $(call COMPILE_RULE,$(src),$({{name}}_CFLAGS))))
 [[else:]]
 $(foreach src,$(SOURCES),$(eval $(call COMPILE_RULE,$(src),$(CFLAGS))))
@@ skipping 14 matching lines @@
 # On NaCl, only produce a stripped binary for Release configs (not Debug).
 ifneq (,$(or $(findstring pnacl,$(TOOLCHAIN)),$(findstring Release,$(CONFIG))))
 $(eval $(call LINK_RULE,{{name}}_unstripped,$({{sources}}),$(LIBS),$(DEPS)))
 $(eval $(call STRIP_RULE,{{name}},{{name}}_unstripped))
 else
 $(eval $(call LINK_RULE,{{name}},$({{sources}}),$(LIBS),$(DEPS)))
 endif
 [[]]
 
 $(eval $(call NMF_RULE,$(TARGET),)){{post}}