[cfe-dev] Some error in clangd

Sam McCall via cfe-dev cfe-dev at lists.llvm.org
Mon Apr 1 05:17:12 PDT 2019 

Hi! Sorry the heuristics aren't working here.
The most likely thing is the bare name "types" is matching some *.cpp file
from a base library, and we're weighing that too heavily and the directory
not heavily enough. This is probably due to heuristics tuned for the LLVM
project itself, which has few dependencies and parallel source/include
trees.
Can you attach compile_commands.json please?

On Mon, Apr 1, 2019 at 11:24 AM Ilya Biryukov <ibiryukov at google.com> wrote:

> I don't think there's any simple solution to this. You could try patching
> your 'compile_commands.json' to add the header files in there, but CMake
> won't do this automatically for you.
> I believe the following project on GitHub tries to do something similar,
> but I haven't tried it myself: https://github.com/Sarcasm/compdb
>
>
> +Sam McCall <sammccall at google.com>, now that you're back from leave, any
> ideas for improving the heuristics to find proper matching .cpp files in
> more cases?
>
> On Mon, Apr 1, 2019 at 11:11 AM yus <suyu.nu at gmail.com> wrote:
>
>> Excuse me, is there any solution for my problem?
>> Thanks
>>
>> yus <suyu.nu at gmail.com> 于2019年3月23日周六 上午9:40写道：
>>
>>> HI,
>>>
>>> Got it.
>>> So my problem has no relationship with front-end vim-YoucompleteMe
>>> I just need to wait for your solution or workaround.
>>>
>>> Thanks for your help.
>>>
>>> Brs,
>>> Su Yu
>>>
>>> Ilya Biryukov <ibiryukov at google.com> 于2019年3月22日周五 下午8:43写道：
>>>
>>>> On Fri, Mar 22, 2019 at 12:41 PM yus <suyu.nu at gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> By the way,
>>>>> If a header has no source file (*.cpp), how it been handled.
>>>>>
>>>> In that case we would fallback to something like `clang -xc++ test.hpp`.
>>>> But that almost never happens, our heuristics will always try to pick
>>>> some cpp file first.
>>>> E.g. in the extreme case when compile_commands.json has just a single
>>>> file, we will take the compile command from that file for *all* headers
>>>> we encounter.
>>>>
>>>>
>>>>>
>>>>> Brs,
>>>>> Su Yu
>>>>>
>>>>> yus <suyu.nu at gmail.com> 于2019年3月22日周五 下午7:37写道：
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> Many thanks for your prompt answer.
>>>>>> It's an open source project.
>>>>>> But it's a little difficult to build. It has many dependency
>>>>>> Hope it can help.
>>>>>> https://github.com/EOSIO/eos
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>> Brs,
>>>>>> Su Yu
>>>>>>
>>>>>>
>>>>>>
>>>>>> Ilya Biryukov <ibiryukov at google.com> 于2019年3月22日周五 下午5:18写道：
>>>>>>
>>>>>>> Hi Su,
>>>>>>>
>>>>>>> Since compile_commands.json only contains compile commands for .cpp
>>>>>>> files, we use a heuristics-based approach to infer compile commands for
>>>>>>> headers.
>>>>>>> More precisely, based on the path to the header file we try to guess
>>>>>>> the best .cpp file for a header (e.g. an implementation file) and pick the
>>>>>>> compile command from it.
>>>>>>>
>>>>>>> In your case, we fail to guess a good compile command. I don't know
>>>>>>> of a good workaround, unfortunately.
>>>>>>> +Sam McCall <sammccall at google.com> is the author of this approach,
>>>>>>> he might have ideas on how to fix this.
>>>>>>>
>>>>>>> Is the project you're working on open-source? If so, could you
>>>>>>> provide a link to the source code? If not, compilation database should also
>>>>>>> be enough to reproduce.
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Mar 21, 2019 at 10:41 PM yus via cfe-dev <
>>>>>>> cfe-dev at lists.llvm.org> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> I encounter an error in clangd
>>>>>>>>
>>>>>>>> I[12:49:12.197] Updating file
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/types.hpp with
>>>>>>>> command* [/root/workspace/eos4/build/libraries/wasm-jit/Source/IR]
>>>>>>>> */usr/bin/clang++-4.0 -D ENABLE_SIMD_PROTOTYPE=0 -D
>>>>>>>> ENABLE_THREADING_PROTOTYPE=0 -D IR_API=DLL_EXPORT -D
>>>>>>>> PRETEND_32BIT_ADDRESS_SPACE=0 -D WAVM_METRICS_OUTPUT=0 -I
>>>>>>>> /root/workspace/eos4/libraries/wasm-jit/Include -I
>>>>>>>> /root/workspace/eos4/libraries/wasm-jit/Include/IR -Wall
>>>>>>>> -Wno-invalid-partial-specialization -O3 -D NDEBUG -c -std=gnu++14
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/types.hpp
>>>>>>>> -resource-dir=/root/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/clang/lib/clang/7.0.0
>>>>>>>> V[12:49:12.199] Preamble for file
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/types.hpp cannot
>>>>>>>> be reused. Attempting to rebuild it.
>>>>>>>> V[12:49:12.238] Built preamble of size 213512 for file
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/types.hpp
>>>>>>>> I[12:49:12.242] Dropped diagnostic outside main file: : too many
>>>>>>>> errors emitted, stopping now
>>>>>>>>
>>>>>>>> some other file in same folder update correctly
>>>>>>>>
>>>>>>>> I[12:49:03.898] Updating file
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/resource_limits.hpp
>>>>>>>> with command *[/root/workspace/eos4/build/libraries/chain] */usr/bin/clang++-4.0
>>>>>>>> -I /root/workspace/eos4/libraries/chain/include -I
>>>>>>>> /root/workspace/eos4/build/libraries/chain/include -I
>>>>>>>> /root/workspace/eos4/libraries/chain/../wasm-jit/Include -I
>>>>>>>> /root/workspace/eos4/libraries/chain/../../externals/binaryen/src -I
>>>>>>>> /root/workspace/eos4/libraries/utilities/include -I
>>>>>>>> /root/workspace/eos4/libraries/utilities/../wasm-jit/Include -I
>>>>>>>> /root/workspace/eos4/libraries/fc/include -I /root/opt/boost/include -I
>>>>>>>> /usr/local/include -I /root/workspace/eos4/libraries/fc/vendor/websocketpp
>>>>>>>> -I /root/workspace/eos4/libraries/chainbase/include -I
>>>>>>>> /root/workspace/eos4/libraries/wasm-jit/Source/Runtime/../../../chain/include
>>>>>>>> -I /root/workspace/eos4/libraries/softfloat/source/include -I
>>>>>>>> /root/workspace/eos4/libraries/softfloat/source/8086-SSE -I
>>>>>>>> /root/workspace/eos4/libraries/softfloat/build/Linux-x86_64-GCC -I
>>>>>>>> /root/workspace/eos4/libraries/builtins -I
>>>>>>>> /root/workspace/eos4/libraries/builtins../softfloat/source/include -Wall
>>>>>>>> -Wno-invalid-partial-specialization -O3 -D NDEBUG -c -std=gnu++14
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/resource_limits.hpp
>>>>>>>> -resource-dir=/root/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/clang/lib/clang/7.0.0
>>>>>>>> V[12:49:03.901] Preamble for file
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/resource_limits.hpp
>>>>>>>> cannot be reused. Attempting to rebuild it.
>>>>>>>> V[12:49:10.676] <<<
>>>>>>>> {"id":"3","jsonrpc":"2.0","method":"textDocument/definition","params":{"position":{"character":51,"line":53},"textDocument":{"uri":"file:///root/workspace/eos4/libraries/chain/include/eosio/chain/resource_limits.hpp"}}}
>>>>>>>>
>>>>>>>> I don't know why, and what's the difference. why the flags are
>>>>>>>> different.
>>>>>>>> How to fix the problem
>>>>>>>>
>>>>>>>> root at 39470746ee31:~/workspace/eos4# /usr/bin/clang++-4.0 -D
>>>>>>>> ENABLE_SIMD_PROTOTYPE=0 -D ENABLE_THREADING_PROTOTYPE=0 -D
>>>>>>>> IR_API=DLL_EXPORT -D PRETEND_32BIT_ADDRESS_SPACE=0 -D WAVM_METRICS_OUTPUT=0
>>>>>>>> -I /root/workspace/eos4/libraries/wasm-jit/Include -I
>>>>>>>> /root/workspace/eos4/libraries/wasm-jit/Include/IR -Wall
>>>>>>>> -Wno-invalid-partial-specialization -O3 -D NDEBUG -c -std=gnu++14
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/types.hpp
>>>>>>>> -resource-dir=/root/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/clang/lib/clang/7.0.0
>>>>>>>> /root/workspace/eos4/libraries/chain/include/eosio/chain/types.hpp:6:10:
>>>>>>>> fatal error: 'eosio/chain/name.hpp' file not found
>>>>>>>> #include <eosio/chain/name.hpp>
>>>>>>>>          ^~~~~~~~~~~~~~~~~~~~~~
>>>>>>>> 1 error generated.
>>>>>>>>
>>>>>>>> attach the error and compilation database
>>>>>>>>
>>>>>>>> Thanks.
>>>>>>>>
>>>>>>>> Brs
>>>>>>>> Su Yu
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> cfe-dev mailing list
>>>>>>>> cfe-dev at lists.llvm.org
>>>>>>>> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Regards,
>>>>>>> Ilya Biryukov
>>>>>>>
>>>>>>
>>>>
>>>> --
>>>> Regards,
>>>> Ilya Biryukov
>>>>
>>>
>
> --
> Regards,
> Ilya Biryukov
>
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