Multiple definition during the linking step

[kenkangxgwe]

Hi, it's me again. There seems to be some problems of the final linking step:

$ VERBOSE=1 cmake --build release
[1/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/third_party/siphash.cc.obj -MF CMakeFiles\ccls.dir\third_party\siphash.cc.obj.d -o CMakeFiles/ccls.dir/third_party/siphash.cc.obj -c ../third_party/siphash.cc
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[3/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/utils.cc.obj -MF CMakeFiles\ccls.dir\src\utils.cc.obj.d -o CMakeFiles/ccls.dir/src/utils.cc.obj -c ../src/utils.cc
[4/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/filesystem.cc.obj -MF CMakeFiles\ccls.dir\src\filesystem.cc.obj.d -o CMakeFiles/ccls.dir/src/filesystem.cc.obj -c ../src/filesystem.cc
[5/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/file_consumer.cc.obj -MF CMakeFiles\ccls.dir\src\file_consumer.cc.obj.d -o CMakeFiles/ccls.dir/src/file_consumer.cc.obj -c ../src/file_consumer.cc
[6/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/messages/ccls_callers.cc.obj -MF CMakeFiles\ccls.dir\src\messages\ccls_callers.cc.obj.d -o CMakeFiles/ccls.dir/src/messages/ccls_callers.cc.obj -c ../src/messages/ccls_callers.cc
[7/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/working_files.cc.obj -MF CMakeFiles\ccls.dir\src\working_files.cc.obj.d -o CMakeFiles/ccls.dir/src/working_files.cc.obj -c ../src/working_files.cc
[8/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/clang_tu.cc.obj -MF CMakeFiles\ccls.dir\src\clang_tu.cc.obj.d -o CMakeFiles/ccls.dir/src/clang_tu.cc.obj -c ../src/clang_tu.cc
[9/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/messages/ccls_base.cc.obj -MF CMakeFiles\ccls.dir\src\messages\ccls_base.cc.obj.d -o CMakeFiles/ccls.dir/src/messages/ccls_base.cc.obj -c ../src/messages/ccls_base.cc
[10/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/clang_utils.cc.obj -MF CMakeFiles\ccls.dir\src\clang_utils.cc.obj.d -o CMakeFiles/ccls.dir/src/clang_utils.cc.obj -c ../src/clang_utils.cc
[11/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/method.cc.obj -MF CMakeFiles\ccls.dir\src\method.cc.obj.d -o CMakeFiles/ccls.dir/src/method.cc.obj -c ../src/method.cc
[12/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/messages/ccls_call_hierarchy.cc.obj -MF CMakeFiles\ccls.dir\src\messages\ccls_call_hierarchy.cc.obj.d -o CMakeFiles/ccls.dir/src/messages/ccls_call_hierarchy.cc.obj -c ../src/messages/ccls_call_hierarchy.cc
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[17/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/platform_win.cc.obj -MF CMakeFiles\ccls.dir\src\platform_win.cc.obj.d -o CMakeFiles/ccls.dir/src/platform_win.cc.obj -c ../src/platform_win.cc
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[19/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/platform_posix.cc.obj -MF CMakeFiles\ccls.dir\src\platform_posix.cc.obj.d -o CMakeFiles/ccls.dir/src/platform_posix.cc.obj -c ../src/platform_posix.cc
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[58/59] D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.0)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/messages/text_document_completion.cc.obj -MF CMakeFiles\ccls.dir\src\messages\text_document_completion.cc.obj.d -o CMakeFiles/ccls.dir/src/messages/text_document_completion.cc.obj -c ../src/messages/text_document_completion.cc
[59/59] cmd.exe /C "cd . && D:\Programs\msys64\mingw64\bin\clang++.exe -O3 -DNDEBUG   CMakeFiles/ccls.dir/third_party/siphash.cc.obj CMakeFiles/ccls.dir/src/clang_complete.cc.obj CMakeFiles/ccls.dir/src/clang_tu.cc.obj CMakeFiles/ccls.dir/src/clang_utils.cc.obj CMakeFiles/ccls.dir/src/config.cc.obj CMakeFiles/ccls.dir/src/file_consumer.cc.obj CMakeFiles/ccls.dir/src/filesystem.cc.obj CMakeFiles/ccls.dir/src/fuzzy_match.cc.obj CMakeFiles/ccls.dir/src/main.cc.obj CMakeFiles/ccls.dir/src/include_complete.cc.obj CMakeFiles/ccls.dir/src/indexer.cc.obj CMakeFiles/ccls.dir/src/method.cc.obj CMakeFiles/ccls.dir/src/language.cc.obj CMakeFiles/ccls.dir/src/log.cc.obj CMakeFiles/ccls.dir/src/lsp.cc.obj CMakeFiles/ccls.dir/src/match.cc.obj CMakeFiles/ccls.dir/src/message_handler.cc.obj CMakeFiles/ccls.dir/src/pipeline.cc.obj CMakeFiles/ccls.dir/src/platform_posix.cc.obj CMakeFiles/ccls.dir/src/platform_win.cc.obj CMakeFiles/ccls.dir/src/position.cc.obj CMakeFiles/ccls.dir/src/project.cc.obj CMakeFiles/ccls.dir/src/query_utils.cc.obj CMakeFiles/ccls.dir/src/query.cc.obj CMakeFiles/ccls.dir/src/serializer.cc.obj CMakeFiles/ccls.dir/src/test.cc.obj CMakeFiles/ccls.dir/src/third_party_impl.cc.obj CMakeFiles/ccls.dir/src/utils.cc.obj CMakeFiles/ccls.dir/src/working_files.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_base.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_call_hierarchy.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_callers.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_file_info.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_freshen_index.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_inheritance_hierarchy.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_member_hierarchy.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_vars.cc.obj CMakeFiles/ccls.dir/src/messages/exit.cc.obj CMakeFiles/ccls.dir/src/messages/initialize.cc.obj CMakeFiles/ccls.dir/src/messages/shutdown.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_code_lens.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_completion.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_definition.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_change.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_close.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_open.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_save.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_document_highlight.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_document_symbol.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_hover.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_implementation.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_references.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_rename.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_signature_help.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_type_definition.cc.obj CMakeFiles/ccls.dir/src/messages/workspace_did_change_configuration.cc.obj CMakeFiles/ccls.dir/src/messages/workspace_did_change_watched_files.cc.obj CMakeFiles/ccls.dir/src/messages/workspace_symbol.cc.obj  -o ccls.exe -Wl,--major-image-version,0,--minor-image-version,0  D:/Programs/msys64/mingw64/lib/libclang.dll.a -Wl,-Bstatic -lclangFrontend -lclangSerialization -lclangAST -lclangLex -lclangDriver -lclangBasic -lLLVMBitReader -lLLVMOption -lLLVMProfileData -lLLVMCore -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -lncurses -Wl,-Bdynamic -lz -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
FAILED: ccls.exe
cmd.exe /C "cd . && D:\Programs\msys64\mingw64\bin\clang++.exe -O3 -DNDEBUG   CMakeFiles/ccls.dir/third_party/siphash.cc.obj CMakeFiles/ccls.dir/src/clang_complete.cc.obj CMakeFiles/ccls.dir/src/clang_tu.cc.obj CMakeFiles/ccls.dir/src/clang_utils.cc.obj CMakeFiles/ccls.dir/src/config.cc.obj CMakeFiles/ccls.dir/src/file_consumer.cc.obj CMakeFiles/ccls.dir/src/filesystem.cc.obj CMakeFiles/ccls.dir/src/fuzzy_match.cc.obj CMakeFiles/ccls.dir/src/main.cc.obj CMakeFiles/ccls.dir/src/include_complete.cc.obj CMakeFiles/ccls.dir/src/indexer.cc.obj CMakeFiles/ccls.dir/src/method.cc.obj CMakeFiles/ccls.dir/src/language.cc.obj CMakeFiles/ccls.dir/src/log.cc.obj CMakeFiles/ccls.dir/src/lsp.cc.obj CMakeFiles/ccls.dir/src/match.cc.obj CMakeFiles/ccls.dir/src/message_handler.cc.obj CMakeFiles/ccls.dir/src/pipeline.cc.obj CMakeFiles/ccls.dir/src/platform_posix.cc.obj CMakeFiles/ccls.dir/src/platform_win.cc.obj CMakeFiles/ccls.dir/src/position.cc.obj CMakeFiles/ccls.dir/src/project.cc.obj CMakeFiles/ccls.dir/src/query_utils.cc.obj CMakeFiles/ccls.dir/src/query.cc.obj CMakeFiles/ccls.dir/src/serializer.cc.obj CMakeFiles/ccls.dir/src/test.cc.obj CMakeFiles/ccls.dir/src/third_party_impl.cc.obj CMakeFiles/ccls.dir/src/utils.cc.obj CMakeFiles/ccls.dir/src/working_files.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_base.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_call_hierarchy.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_callers.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_file_info.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_freshen_index.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_inheritance_hierarchy.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_member_hierarchy.cc.obj CMakeFiles/ccls.dir/src/messages/ccls_vars.cc.obj CMakeFiles/ccls.dir/src/messages/exit.cc.obj CMakeFiles/ccls.dir/src/messages/initialize.cc.obj CMakeFiles/ccls.dir/src/messages/shutdown.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_code_lens.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_completion.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_definition.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_change.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_close.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_open.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_did_save.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_document_highlight.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_document_symbol.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_hover.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_implementation.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_references.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_rename.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_signature_help.cc.obj CMakeFiles/ccls.dir/src/messages/text_document_type_definition.cc.obj CMakeFiles/ccls.dir/src/messages/workspace_did_change_configuration.cc.obj CMakeFiles/ccls.dir/src/messages/workspace_did_change_watched_files.cc.obj CMakeFiles/ccls.dir/src/messages/workspace_symbol.cc.obj  -o ccls.exe -Wl,--major-image-version,0,--minor-image-version,0  D:/Programs/msys64/mingw64/lib/libclang.dll.a -Wl,-Bstatic -lclangFrontend -lclangSerialization -lclangAST -lclangLex -lclangDriver -lclangBasic -lLLVMBitReader -lLLVMOption -lLLVMProfileData -lLLVMCore -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -lncurses -Wl,-Bdynamic -lz -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
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CMakeFiles/ccls.dir/src/pipeline.cc.obj:(.text+0x5b50): multiple definition of `TLS wrapper function for g_thread_id'
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D:\Programs\msys64\mingw64\lib\libclangLex.a(ModuleMap.cpp.obj):(.text$_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EE17_M_realloc_insertIJS5_EEEvN9__gnu_cxx17__normal_iteratorIPS5_S7_EEDpOT_[_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EE17_M_realloc_insertIJS5_EEEvN9__gnu_cxx17__normal_iteratorIPS5_S7_EEDpOT_]+0x0): multiple definition of `void std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_realloc_insert<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(__gnu_cxx::__normal_iterator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&)'
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D:\Programs\msys64\mingw64\lib\libclangBasic.a(DiagnosticIDs.cpp.obj):(.text$_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_[_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_]+0x0): multiple definition of `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
CMakeFiles/ccls.dir/src/clang_tu.cc.obj:(.text[_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libclangBasic.a(VirtualFileSystem.cpp.obj):(.text$_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE14_M_get_deleterERKSt9type_info[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE14_M_get_deleterERKSt9type_info]+0x0): multiple definition of `std::_Sp_counted_deleter<llvm::sys::fs::detail::DirIterState*, std::__shared_ptr<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<llvm::sys::fs::detail::DirIterState> >, std::allocator<llvm::sys::fs::detail::DirIterState>, (__gnu_cxx::_Lock_policy)2>::_M_get_deleter(std::type_info const&)'
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D:\Programs\msys64\mingw64\lib\libclangBasic.a(VirtualFileSystem.cpp.obj):(.text$_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EED0Ev[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EED0Ev]+0x0): multiple definition of `std::_Sp_counted_deleter<llvm::sys::fs::detail::DirIterState*, std::__shared_ptr<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<llvm::sys::fs::detail::DirIterState> >, std::allocator<llvm::sys::fs::detail::DirIterState>, (__gnu_cxx::_Lock_policy)2>::~_Sp_counted_deleter()'
CMakeFiles/ccls.dir/src/filesystem.cc.obj:(.text[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EED0Ev]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libclangBasic.a(VirtualFileSystem.cpp.obj):(.text$_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE10_M_destroyEv[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE10_M_destroyEv]+0x0): multiple definition of `std::_Sp_counted_deleter<llvm::sys::fs::detail::DirIterState*, std::__shared_ptr<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<llvm::sys::fs::detail::DirIterState> >, std::allocator<llvm::sys::fs::detail::DirIterState>, (__gnu_cxx::_Lock_policy)2>::_M_destroy()'
CMakeFiles/ccls.dir/src/filesystem.cc.obj:(.text[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE10_M_destroyEv]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libclangBasic.a(VirtualFileSystem.cpp.obj):(.text$_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE10_M_disposeEv[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE10_M_disposeEv]+0x0): multiple definition of `std::_Sp_counted_deleter<llvm::sys::fs::detail::DirIterState*, std::__shared_ptr<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<llvm::sys::fs::detail::DirIterState> >, std::allocator<llvm::sys::fs::detail::DirIterState>, (__gnu_cxx::_Lock_policy)2>::_M_dispose()'
CMakeFiles/ccls.dir/src/filesystem.cc.obj:(.text[_ZNSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE10_M_disposeEv]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libclangBasic.a(VirtualFileSystem.cpp.obj):(.rdata$_ZTVSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE[_ZTVSt19_Sp_counted_deleterIPN4llvm3sys2fs6detail12DirIterStateENSt12__shared_ptrIS4_LN9__gnu_cxx12_Lock_policyE2EE8_DeleterISaIS4_EEESB_LS8_2EE]+0x0): multiple definition of `vtable for std::_Sp_counted_deleter<llvm::sys::fs::detail::DirIterState*, std::__shared_ptr<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<llvm::sys::fs::detail::DirIterState> >, std::allocator<llvm::sys::fs::detail::DirIterState>, (__gnu_cxx::_Lock_policy)2>'
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Update (07/07/2018)
After I use -DUSE_SHARED_LLVM=on, the following multiple definitions disppeared:

D:\Programs\msys64\mingw64\lib\libLLVMCore.a(OptBisect.cpp.obj):(.text$_ZNK4llvm2cl15OptionValueCopyIiE7compareERKNS0_18GenericOptionValueE[_ZNK4llvm2cl15OptionValueCopyIiE7compareERKNS0_18GenericOptionValueE]+0x0): multiple definition of `llvm::cl::OptionValueCopy<int>::compare(llvm::cl::GenericOptionValue const&) const'
CMakeFiles/ccls.dir/src/main.cc.obj:(.text[_ZNK4llvm2cl15OptionValueCopyIiE7compareERKNS0_18GenericOptionValueE]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libLLVMCore.a(OptBisect.cpp.obj):(.rdata$_ZTVN4llvm2cl11OptionValueIiEE[_ZTVN4llvm2cl11OptionValueIiEE]+0x0): multiple definition of `vtable for llvm::cl::OptionValue<int>'
CMakeFiles/ccls.dir/src/main.cc.obj:(.rdata[_ZTVN4llvm2cl11OptionValueIiEE]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libLLVMCore.a(DIBuilder.cpp.obj):(.text$_ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE[_ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE]+0x0): multiple definition of `llvm::cl::OptionValueCopy<bool>::compare(llvm::cl::GenericOptionValue const&) const'
CMakeFiles/ccls.dir/src/main.cc.obj:(.text[_ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libLLVMCore.a(DIBuilder.cpp.obj):(.rdata$_ZTVN4llvm2cl11OptionValueIbEE[_ZTVN4llvm2cl11OptionValueIbEE]+0x0): multiple definition of `vtable for llvm::cl::OptionValue<bool>'
CMakeFiles/ccls.dir/src/main.cc.obj:(.rdata[_ZTVN4llvm2cl11OptionValueIbEE]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libLLVMSupport.a(CommandLine.cpp.obj):(.text$_ZNK4llvm2cl15OptionValueCopyINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE7compareERKNS0_18GenericOptionValueE[_ZNK4llvm2cl15OptionValueCopyINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE7compareERKNS0_18GenericOptionValueE]+0x0): multiple definition of `llvm::cl::OptionValueCopy<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::compare(llvm::cl::GenericOptionValue const&) const'
CMakeFiles/ccls.dir/src/main.cc.obj:(.text[_ZNK4llvm2cl15OptionValueCopyINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE7compareERKNS0_18GenericOptionValueE]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libLLVMSupport.a(CommandLine.cpp.obj):(.rdata$_ZTVN4llvm2cl15OptionValueCopyINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEE[_ZTVN4llvm2cl15OptionValueCopyINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEE]+0x0): multiple definition of `vtable for llvm::cl::OptionValueCopy<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >'
CMakeFiles/ccls.dir/src/main.cc.obj:(.rdata[_ZTVN4llvm2cl15OptionValueCopyINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEE]+0x0): first defined here

log ends with:

clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

[myrgy]

Hi, I think it worth to generate full compilation log.
Try make clean, and then compile with verbose (not sure how to do it with MSVC, under linux just VERBOSE=1 make --build release)

[kenkangxgwe]

Hi @myrgy , I have the updated log (see above). Clang says that use -v to see invocation, but I haven't figure out how to use cmake to add -v to clang.exe

[myrgy]

Hi again, unfortunately I don't have windows workstation. Will try to set up appveyor build.

[MaskRay]

One "multiply-defined" function is compare at https://github.com/llvm-mirror/llvm/tree/master/include/llvm/Support/CommandLine.h#L520

On Linux, such symbols (compiled from inline member functions) are STB_WEAK STV_HIDDEN and should not conflict with each other. Not sure about GNU environment on Windows, though.....

% readelf -Ws ~/Dev/llvm/static-release/lib/libLLVMSupport.a | grep 'OptionValueCopyIb'
   810: 0000000000000000    28 FUNC    WEAK   HIDDEN   465 _ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE
    94: 0000000000000000    28 FUNC    WEAK   HIDDEN    22 _ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE
   124: 0000000000000000    28 FUNC    WEAK   HIDDEN    43 _ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE
   274: 0000000000000000    28 FUNC    WEAK   HIDDEN   112 _ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE
   177: 0000000000000000    28 FUNC    WEAK   HIDDEN    66 _ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE

Here is the -DUSE_SHARED_LLVM=on case:

% readelf -Ws ~/Dev/llvm/release/lib/libLLVMSupport.so | grep 'OptionValueCopyIb' | c++filt
   360: 00000000000af7a0    28 FUNC    LOCAL  HIDDEN    15 llvm::cl::OptionValueCopy<bool>::compare(llvm::cl::GenericOptionValue const&) const

If you have libLLVM.so, can you try -DUSE_SHARED_LLVM=on? It should be similar to that of libLLVMSupport.so (there are so many libLLVM*.a and a single libLLVM.so is more convenient) https://github.com/MaskRay/ccls/wiki/Build#cmake-options

Suppose your build directory is build/, ninja -C release -v should tell you the link command line (you can find -o ccls). Can you append -Wl,-y,_ZNK4llvm2cl15OptionValueCopyIbE7compareERKNS0_18GenericOptionValueE to see what libraries have defined the symbol?

If you happen to have LLD installed (usually bin/ld.lld bin/lld beside bin/clang), -fuse-ld=lld switches to use LLD as the linker, which gives better diagnostics than GNU ld.

[kenkangxgwe]

Hi @MaskRay . After I used -DUSE_SHARED_LLVM=on, the multiple definitions of OptionValueCopy is no longer there. Please see my update in the original post. And I tried to append -Wl,-y,_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy after -o ccls.exe and this was what I got :

...
D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclBase.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclBase.cpp.obj):(.text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy[_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy]+0x0): multiple definition of `llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ull, 4096ull>::Allocate(unsigned long long, unsigned long long)'
CMakeFiles/ccls.dir/src/serializer.cc.obj:(.text[_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclCXX.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(Expr.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(RecordLayoutBuilder.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTContext.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(AttrImpl.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(Decl.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclObjC.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
D:\Programs\msys64\mingw64\lib\libclangAST.a(MicrosoftMangle.cpp.obj):(.text$_ZNSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE8_M_eraseEPSt13_Rb_tree_nodeIiE[_ZNSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE8_M_eraseEPSt13_Rb_tree_nodeIiE]+0x0): multiple definition of `std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>, std::allocator<int> >::_M_erase(std::_Rb_tree_node<int>*)'
CMakeFiles/ccls.dir/src/third_party_impl.cc.obj:(.text[_ZNSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE8_M_eraseEPSt13_Rb_tree_nodeIiE]+0x0): first defined here
D:\Programs\msys64\mingw64\lib\libclangLex.a(PPDirectives.cpp.obj): definition of _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
...

[kenkangxgwe]

I have installed the lld and add -DLLVM_ENABLE_LLD=ON, but I saw no difference from the output. How do I know if it uses lld?

[MaskRay]

-DLLVM_ENABLE_LLD=ON is an option in the build system of LLVM. ccls/cmake/* does not support this option. clang++ -fuse-ld=lld a.cc -o a (a.o will be linked with LLD)

Regarding the TLS issue (might not be related https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 ), does this patch work?
src/config.h:

- thread_local extern int g_thread_id;
+ thread_local int g_thread_id;

% c++filt <<< _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ull, 4096ull>::Allocate(unsigned long long, unsigned long long)

https://github.com/llvm-mirror/llvm/tree/master/include/llvm/Support/Allocator.h#L214

The inline member function should be of STB_WEAK STV_HIDDEN and should not conflict with each other.
Can you check with readelf -Ws D:\Programs\msys64\mingw64\lib\libclangAST.a (see my comment at #23 (comment)) what visibility,binding these symbols have?

[kenkangxgwe]

I tried to add -fuse-ld=lld but it said that

clang++.exe: error: invalid linker name in argument '-fuse-ld=lld'

Same if I tried -fuse-ld=lld-link and -fuse-ld=ld.lld.

Anyway, do you have any idea about #23 (comment)?

[MaskRay]

You can remove -fuse-ld=lld. It instructs the compiler driver to use lld as the linker. I use it everywhere because it is faster than the default linker.

Regarding #23, can you check these Windows archives with objdump -t or llvm-objdump -t (llvm-objdump may be shipped with downloaded releases.llvm.org archive) to see if they do have multiple definition? This may be related to COMDAT section handling of your linker, but I'm not sure (I don't use Windows)

[kenkangxgwe]

Ok, maybe I have ignored one of your replies.

1. After I apply the patch, it gives me a semantic error:

[1/48] Building CXX object CMakeFiles/ccls.dir/src/config.cc.obj
FAILED: CMakeFiles/ccls.dir/src/config.cc.obj
D:\Programs\msys64\mingw64\bin\clang++.exe  -DDEFAULT_RESOURCE_DIRECTORY=R\"(D:\Programs\msys64\mingw64\lib\clang\6.0.1)\" -DLOGURU_FILENAME_WIDTH=18 -DLOGURU_THREADNAME_WIDTH=13 -DLOGURU_WITH_STREAMS=1 -I../src -I../third_party -I../third_party/rapidjson/include -I../third_party/loguru -I../third_party/doctest -isystem D:/Programs/msys64/mingw64/include -O3 -DNDEBUG   -fno-rtti -Wall -Wno-sign-compare -std=c++1z -MD -MT CMakeFiles/ccls.dir/src/config.cc.obj -MF CMakeFiles\ccls.dir\src\config.cc.obj.d -o CMakeFiles/ccls.dir/src/config.cc.obj -c ../src/config.cc
../src/config.cc:4:18: error: redefinition of 'g_thread_id'
thread_local int g_thread_id;
                 ^
../src/config.h:263:18: note: previous definition is here
thread_local int g_thread_id;
                 ^
1 error generated.

2. This is the output of readelf -Ws D:\Programs\msys64\mingw64\lib\libclangAST.a

D:\Programs\msys64\mingw64\lib\libclangAST.a(APValue.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTConsumer.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTContext.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTDiagnostic.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTDumper.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTImporter.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTStructuralEquivalence.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ASTTypeTraits.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(AttrImpl.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(CXXInheritance.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(Comment.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(CommentBriefParser.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(CommentCommandTraits.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(CommentLexer.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(CommentParser.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(CommentSema.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DataCollection.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(Decl.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclarationName.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclBase.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclCXX.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclFriend.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclGroup.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclObjC.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclOpenMP.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclPrinter.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(DeclTemplate.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(Expr.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ExprClassification.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ExprConstant.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ExprCXX.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ExprObjC.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ExternalASTMerger.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ExternalASTSource.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(InheritViz.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ItaniumCXXABI.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ItaniumMangle.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(Mangle.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(MicrosoftCXXABI.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(MicrosoftMangle.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(NestedNameSpecifier.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(NSAPI.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ODRHash.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(OpenMPClause.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(ParentMap.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(QualTypeNames.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(RawCommentList.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(RecordLayout.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(RecordLayoutBuilder.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(SelectorLocationsKind.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(Stmt.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtCXX.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtIterator.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtObjC.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtOpenMP.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtPrinter.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtProfile.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(StmtViz.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(TemplateBase.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(TemplateName.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(Type.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(TypeLoc.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(TypePrinter.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(VTableBuilder.cpp.obj)
readelf ELF  -  magic

D:\Programs\msys64\mingw64\lib\libclangAST.a(VTTBuilder.cpp.obj)
readelf ELF  -  magic

3. Yes, they do have multiple definitions.
   Taking _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy as an example, it gives:

.\libclangAST.a(ASTContext.cpp.obj):    file format COFF-x86-64
[822](sec 535)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[824](sec 535)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[2214](sec 536)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[2216](sec 537)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(AttrImpl.cpp.obj):      file format COFF-x86-64
[469](sec 19)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[471](sec 19)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[726](sec 20)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[728](sec 21)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(Decl.cpp.obj):  file format COFF-x86-64
[508](sec 253)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[510](sec 253)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[1022](sec 254)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[1024](sec 255)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(DeclBase.cpp.obj):      file format COFF-x86-64
[214](sec 61)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[216](sec 61)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[354](sec 62)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[356](sec 63)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(DeclCXX.cpp.obj):       file format COFF-x86-64
[423](sec 244)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[425](sec 244)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[866](sec 245)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[868](sec 246)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(DeclObjC.cpp.obj):      file format COFF-x86-64
[257](sec 160)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[259](sec 160)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[621](sec 161)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[623](sec 162)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(Expr.cpp.obj):  file format COFF-x86-64
[241](sec 61)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[243](sec 61)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[343](sec 62)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[345](sec 63)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(RecordLayoutBuilder.cpp.obj):   file format COFF-x86-64
[52](sec 40)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[54](sec 40)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[246](sec 41)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[248](sec 42)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
.\libclangAST.a(StmtOpenMP.cpp.obj):    file format COFF-x86-64
[66](sec 57)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .text$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[68](sec 57)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00000000 _ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[235](sec 58)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .xdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy
[237](sec 59)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .pdata$_ZN4llvm20BumpPtrAllocatorImplINS_15MallocAllocatorELy4096ELy4096EE8AllocateEyy

So how does the linker on other platforms distinguish these definitions? Any suggestions that I can try on Windows?

[MaskRay]

In ELF environments, such inline member functions compile to weak symbols (STB_WEAK). During linking only one copy is kept. If they were global (STB_GLOBAL), there would be multiple definition linking errors.

% cat a.cc
struct A {
  void foo() {}
};

void bar(A a) {
  a.foo();
}
% g++ a.cc -c && readelf -s a.o

Symbol table '.symtab' contains 12 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS a.cc
     2: 0000000000000000     0 SECTION LOCAL  DEFAULT    2
     3: 0000000000000000     0 SECTION LOCAL  DEFAULT    4
     4: 0000000000000000     0 SECTION LOCAL  DEFAULT    5
     5: 0000000000000000     0 SECTION LOCAL  DEFAULT    6
     6: 0000000000000000     0 SECTION LOCAL  DEFAULT    8
     7: 0000000000000000     0 SECTION LOCAL  DEFAULT    9
     8: 0000000000000000     0 SECTION LOCAL  DEFAULT    7
     9: 0000000000000000     0 SECTION LOCAL  DEFAULT    1
    10: 0000000000000000    11 FUNC    WEAK   DEFAULT    6 _ZN1A3fooEv
    11: 0000000000000000    16 FUNC    GLOBAL DEFAULT    2 _Z3bar1A

On Windows, COFF object format should use COMDAT but I'm not familiar with it.

Can you check if thread_local declarations are broken on msys2?

[Riatre]

FYI I'm able to build ccls under MSYS2 MinGW64 with GCC instead of Clang:

$ mkdir build; cd build
$ cmake .. -G Ninja -DCMAKE_CXX_COMPILER=g++ -DSYSTEM_CLANG=ON
-- The CXX compiler identification is GNU 8.2.0
-- Check for working CXX compiler: C:/msys64/mingw64/bin/g++.exe
-- Check for working CXX compiler: C:/msys64/mingw64/bin/g++.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Setting build type to 'Release' as none was specified.
-- Using system Clang
-- Found Clang: C:/msys64/mingw64/lib/libclangIndex.a (found suitable version "6.0.1", minimum required is "6.0.0")
-- Looking for cbreak in C:/msys64/mingw64/lib/libncurses.a
-- Looking for cbreak in C:/msys64/mingw64/lib/libncurses.a - found
-- Found Curses: C:/msys64/mingw64/lib/libncurses.a
-- Found ZLIB: C:/msys64/mingw64/lib/libz.dll.a (found version "1.2.11")
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - found
-- Found Threads: TRUE
-- Configuring done
-- Generating done
-- Build files have been written to: C:/<redacted>/ccls/build
$ cmake --build  . -j 12
[1/59] Building CXX object CMakeFiles/ccls.dir/third_party/siphash.cc.obj
[2/59] Building CXX object CMakeFiles/ccls.dir/src/fuzzy_match.cc.obj
[3/59] Building CXX object CMakeFiles/ccls.dir/src/config.cc.obj
[4/59] Building CXX object CMakeFiles/ccls.dir/src/method.cc.obj
[5/59] Building CXX object CMakeFiles/ccls.dir/src/language.cc.obj
[6/59] Building CXX object CMakeFiles/ccls.dir/src/platform_posix.cc.obj
[7/59] Building CXX object CMakeFiles/ccls.dir/src/log.cc.obj
[8/59] Building CXX object CMakeFiles/ccls.dir/src/filesystem.cc.obj
[9/59] Building CXX object CMakeFiles/ccls.dir/src/clang_utils.cc.obj
[10/59] Building CXX object CMakeFiles/ccls.dir/src/position.cc.obj
[11/59] Building CXX object CMakeFiles/ccls.dir/src/file_consumer.cc.obj
[12/59] Building CXX object CMakeFiles/ccls.dir/src/include_complete.cc.obj
[13/59] Building CXX object CMakeFiles/ccls.dir/src/platform_win.cc.obj
[14/59] Building CXX object CMakeFiles/ccls.dir/src/lsp.cc.obj
[15/59] Building CXX object CMakeFiles/ccls.dir/src/main.cc.obj
../src/main.cc: In function 'int main(int, char**)':
../src/main.cc:93:25: warning: unknown conversion type character 'z' in format [-Wformat=]
         fprintf(stderr, "Failed to parse --init as JSON: %s (%zd)\n",
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/main.cc:93:25: warning: too many arguments for format [-Wformat-extra-args]
../src/main.cc:93:25: warning: unknown conversion type character 'z' in format [-Wformat=]
../src/main.cc:93:25: warning: too many arguments for format [-Wformat-extra-args]
[16/59] Building CXX object CMakeFiles/ccls.dir/src/message_handler.cc.obj
<...snipped...>
[57/59] Building CXX object CMakeFiles/ccls.dir/src/messages/textDocument_signatureHelp.cc.obj
[58/59] Building CXX object CMakeFiles/ccls.dir/src/messages/ccls_callHierarchy.cc.obj
[59/59] Linking CXX executable ccls.exe

$ ls -alh ccls.exe
-rwxr-xr-x 1 Riatre None 27M Aug  6 03:05 ccls.exe

Note that libclangDriver.a needs some additional libraries, which is addressed in #46, without that patch you may see something like:

C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../lib\libclangDriver.a(MSVC.cpp.obj):(.text+0x1348): undefined reference to `GetFileVersionInfoSizeW'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../lib\libclangDriver.a(MSVC.cpp.obj):(.text+0x13af): undefined reference to `GetFileVersionInfoW'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../lib\libclangDriver.a(MSVC.cpp.obj):(.text+0x144a): undefined reference to `VerQueryValueW'

[Riatre]

thread_local is indeed broken on MSYS2, it is a known bug. Somehow their patched clang never emit COMDAT for these thread_local things.

Other multiple definitions is likely caused by another upstream bug, this time in clang itself. tl;dr: You may consider that object files emitted by GCC and clang being not compatible on Windows, and their libClangXXX.a is compiled with GCC.

I think there is nothing we can do. Fortunately GCC works.