clang-tidy: adjust used compile commands / pass flags possible?

matse

Hello,

I have a quite complex and large project, that uses an own build system on top of cmake and uses e.g. Intel compiler.
Currently I can load the CMakeLists.txt and work on the project in QtCreator (15.0.0) just fine.
Now I wanted to use clang-tidy on one file, unfortunately this is currently not possible for me in QtCreator. I managed to get it working from the command-line, so let me first explain what I had to do to get it running:

I enabled

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

to generate a compile_commands.json file in my build directory build/ninja/Debug
When first trying to run:

clang-tidy source/my_file.cpp -p build/ninja/Debug

where I specified the build path (to the location where also compile_commands.json is) with the -p switch.
With this I got an error like:

error: 'Kokkos_Core.hpp' file not found [clang-diagnostic-error]
   13 | #include "Kokkos_Core.hpp"

For any reason I could build the library just finie and it picked up this header and the corresponding library, but clang-tidy did not find it. So I manually added the path to the library with the -I switch:

clang-tidy source/my_file.cpp -p build/ninja/Debug -- -I $TRILINOS_DIR/include/

With this I got the next error:

error: unknown argument: '-no-diag-error-limit' [clang-diagnostic-error]

This is an Intel flag, specified in the compile_commands.json file.
I removed this flag manually in my compile_commands.json and finally clang-tidy works fine from the command line.
However - it would be great to see the problems in QtCreator with the visual feedback. Unfortunately if I run clang-tidy on the same file, I get the same error as before on the command line:

error: unknown argument: '-no-diag-error-limit' [clang-diagnostic-error]

Is there a way to adjust this in a similar way, as before manually or how does QtCreator invode clang-tidy (and is there a way to adjust this behavior)?

Maybe anybody can help me here.
Thanks and many greetings
matse

matse

A little update on this:
I just saw the QtCreator output:

Creating compilation database for Clang-Tidy in "/tmp/QtCreator-GXwzFX/Clang-Tidy.XgcZGh" ...

So in /tmp/QtCreator-GXwzFX/Clang-Tidy.XgcZGh/compilation_commands.json I removed -no-diag-error-limit for my source file and this helped with the first error. Now I get the other error (that I first got on the command line):

error: 'Kokkos_Core.hpp' file not found [clang-diagnostic-error]
   13 | #include "Kokkos_Core.hpp"

So I'm looking for a way to adjust the include path or pass parameters to clang-tidy. Of course it would be also nice if QtCreator would use a compilation_database, that is persistent or if I could find a better way to cope with the situation.

cristian-adam

Try setting the environment variable QTC_CLANG_CMD_OPTIONS_BLACKLIST=-no-diag-error-limit before starting Qt Creator.

matse

@cristian-adam Thanks for the quick help! This is really great and works like a charm. I can simply pass all the arguments via the environment variable - how nice!
I will mark this as solved. Thanks again for the help and many greetings
matse