[cfe-dev] Some error in clangd

[Ilya Biryukov via cfe-dev]

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
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