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# Copyright 2017 MongoDB Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import SCons
def _tag_as_precious(target, source, env):
env.Precious(target)
return target, source
def generate(env):
builders = env['BUILDERS']
for builder in ('Program', 'SharedLibrary', 'LoadableModule'):
emitter = builders[builder].emitter
builders[builder].emitter = SCons.Builder.ListEmitter([
emitter,
_tag_as_precious,
])
def exists(env):
# By default, the windows linker is incremental, so unless
# overridden in the environment with /INCREMENTAL:NO, the tool is
# in play.
if env.TargetOSIs('windows') and not "/INCREMENTAL:NO" in env['LINKFLAGS']:
return True
# On posix platforms, excluding darwin, we may have enabled
# incremental linking. Check for the relevant flags.
if env.TargetOSIs('posix') and \
not env.TargetOSIs('darwin') and \
"-fuse-ld=gold" in env['LINKFLAGS'] and \
"-Wl,--incremental" in env['LINKFLAGS']:
return True
return False
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