Clang-Tidy reports wrong command line argument even though it is not specified at all

[hubbergit]

Bugzilla Link	50295
Version	unspecified
OS	Windows NT
Attachments	Configuration file
CC	@EugeneZelenko,@zmodem

Extended Description

OS: Windows 10 (64-Bit)
LLVM Version: 12.0.0 (64-Bit)

I am calling clang-tidy on the regular windows command prompt like this:

"C:/Program Files/LLVM/bin/clang-tidy.exe" -quiet -fix -header-filter=MyFile.h -p=E:/MyProjekt.build ./MyFile.cpp

Please note that especially "-fsyntax-only" and "-resource-dir" are not specified on the command line.

The output of clang-tidy is:

./MyFile.cpp
8809 warnings and 2 errors generated.
Error while processing <..cut..>\MyFile.cpp.
error: no such file or directory: '-fsyntax-only'; did you mean '-fsyntax-only'? [clang-diagnostic-error]
error: no such file or directory: '-resource-dir=C:\Program Files\LLVM\lib\clang\12.0.0'; did you mean '-resource-dir=C:\Program Files\LLVM\lib\clang\12.0.0'? [clang-diagnostic-error]

This is obviously an error.

Attached you can also find my .clang-tidy configuration file.

[EugeneZelenko]

Clang-tidy gets Clang command-line arguments from compile database (specified in -p), so please check content of E:/MyProjekt.build.

[hubbergit]

Here is the relevant part from the compile database:

{
"directory": "E:/MyProjekt.build",
"command": "C:\PROGRA~1\LLVM\bin\clang-cl.exe /nologo -TP -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -D_SBCS <many include paths with -I and -imsvc> -m32 -fdiagnostics-absolute-paths /DWIN32 /D_WINDOWS /GR /EHsc /Zi /Ob0 /Od /RTC1 -MDd -Wfatal-errors -Wno-parentheses /FoCMakeFiles\MyFile.cpp.obj /FdTARGET_COMPILE_PDB -c -- C:\MyProjekt.source\MyFile.cpp",
"file": "C:\MyProjekt.source\MyFile.cpp"
}

Both command line options (-fsyntax-only and -resource-dir) do not appear in the compile database for this file.

Additionally I searched the compile database file for both strings and they do not appear in the compile database.

Do you agree that it has to be something else then?

[EugeneZelenko]

clang-cl.exe translates MSVC compiler command line options into Clang one. It's necessary to get result of such translation to proceed.

[hubbergit]

I experimented with the option -### of clang-cl, however it produced no output that would help here.

Any idea how to proceed?

Should I open a ticket for clang-cl instead?

[carlosgalvezp]

Problem does not seem related to clang-tidy, please open a ticket for clang-cl instead if the problem persists.

[smcpeak]

This bug was caused by the tooling infrastructure mishandling a -- switch in the command field in compile_commands.json. It was fixed in LLVM-13 or LLVM-14. See https://stackoverflow.com/a/78460449/2659307 for more information.