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mongodb/site_scons/site_tools/split_dwarf.py

74 lines
2.8 KiB
Python

# Copyright 2020 MongoDB Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
import SCons
_splitDwarfFlag = "-gsplit-dwarf"
# Cribbed from Tool/cc.py and Tool/c++.py. It would be better if
# we could obtain this from SCons.
_CSuffixes = [".c"]
if not SCons.Util.case_sensitive_suffixes(".c", ".C"):
_CSuffixes.append(".C")
_CXXSuffixes = [".cpp", ".cc", ".cxx", ".c++", ".C++"]
if SCons.Util.case_sensitive_suffixes(".c", ".C"):
_CXXSuffixes.append(".C")
def _dwo_emitter(target, source, env):
new_targets = []
for t in target:
base, ext = SCons.Util.splitext(str(t))
if not any(ext == env[osuffix] for osuffix in ["OBJSUFFIX", "SHOBJSUFFIX"]):
continue
# TODO: Move 'dwo' into DWOSUFFIX so it can be customized? For
# now, GCC doesn't let you control the output filename, so it
# doesn't matter.
dwotarget = (t.builder.target_factory or env.File)(base + ".dwo")
new_targets.append(dwotarget)
targets = target + new_targets
return (targets, source)
def generate(env):
suffixes = []
if _splitDwarfFlag in env["CCFLAGS"]:
suffixes = _CSuffixes + _CXXSuffixes
else:
if _splitDwarfFlag in env["CFLAGS"]:
suffixes.extend(_CSuffixes)
if _splitDwarfFlag in env["CXXFLAGS"]:
suffixes.extend(_CXXSuffixes)
for object_builder in SCons.Tool.createObjBuilders(env):
emitterdict = object_builder.builder.emitter
for suffix in emitterdict.keys():
if not suffix in suffixes:
continue
base = emitterdict[suffix]
emitterdict[suffix] = SCons.Builder.ListEmitter([base, _dwo_emitter,])
def exists(env):
return any(_splitDwarfFlag in env[f] for f in ["CCFLAGS", "CFLAGS", "CXXFLAGS"])