| # Copyright 2017 Google Inc. All Rights Reserved. |
| # |
| # 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. |
| """Allows to use Clang (invoked as clang++) as a dynamic linker.""" |
| |
| from starboard.tools.toolchain import abstract |
| from starboard.tools.toolchain import common |
| |
| |
| class DynamicLinkerBase(object): |
| """A base class for Clang based linking of executables and shared libraries. |
| |
| Invoked as clang++. |
| """ |
| |
| def __init__(self, **kwargs): |
| self._path = common.GetPath('clang++', **kwargs) |
| self._extra_flags = kwargs.get('extra_flags', []) |
| self._max_concurrent_processes = kwargs.get( |
| 'max_concurrent_processes', common.EstimateMaxConcurrentLinkers()) |
| |
| def GetPath(self): |
| return self._path |
| |
| def GetExtraFlags(self): |
| return self._extra_flags |
| |
| def GetMaxConcurrentProcesses(self): |
| return self._max_concurrent_processes |
| |
| def GetDescription(self): |
| return 'LINK $out' |
| |
| def GetRspFilePath(self): |
| return '$out.rsp' |
| |
| def GetRspFileContent(self): |
| return '$in_newline' |
| |
| def GetFlags(self, ldflags): |
| return ldflags |
| |
| |
| class ExecutableLinker(DynamicLinkerBase, abstract.ExecutableLinker): |
| """Links executables using Clang (invoked as clang++).""" |
| |
| def __init__(self, **kwargs): |
| super(ExecutableLinker, self).__init__(**kwargs) |
| |
| def GetCommand(self, path, extra_flags, flags, shell): |
| del shell # Not used. |
| return '{0} {1} {2} @$rspfile -o $out'.format(path, extra_flags, flags) |
| |
| |
| class SharedLibraryLinker(DynamicLinkerBase, abstract.SharedLibraryLinker): |
| """Links shared libraries using Clang (invoked as clang++).""" |
| |
| def __init__(self, **kwargs): |
| super(SharedLibraryLinker, self).__init__(**kwargs) |
| |
| def GetCommand(self, path, extra_flags, flags, shell): |
| del shell # Not used. |
| return ('{0} -shared {1} -o $out {2} -Wl,-soname=$soname ' |
| '-Wl,--whole-archive @$rspfile -Wl,--no-whole-archive').format( |
| path, extra_flags, flags) |