Hi,

unfortunately building with MSVC and feeding Clangd with information are 
different processes.
The former one is just telling CMake to do its stuff based on the CMake project 
files, but we cannot do the same for Clangd or clang-tidy.
CMake gives us information about the flags that it passes to MSVC, but it 
complicates things that Clang and MSVC have different interfaces.

Qt Creator generates <build>/.qtc_clangd/compile_commands.json for Clang, from 
the information from CMake given via .cmake/api/v1/reply/, and some information 
can also be inspected via Tools > Debug Qt Creator > Inspect C++ Code Model.

The best would be to create a bug report with information on which flags go 
missing and other details.

Br, Eike

> Am 27.09.2023 um 18:43 schrieb Adam Light <acli...@gmail.com>:
> 
> Hi
> 
> If I compile my cmake-based project from Qt Creator 11.0.2 on Windows using 
> the build tools that come with MS Visual Studio 2022, the project compiles 
> without errors or warnings emitted. However, if I run clang-tidy on the 
> entire project, there are quite a few files that cannot be processed due to 
> compile errors in the file. If I open those files with errors in Creator, I 
> see the red circle in the margin, indicating an error, on the same lines that 
> clang-tidy complains about.
> 
> Clearly clangd/clang-tidy and MSVC are doing something different if the 
> compile is successful only in MSVC, but I can't figure out why that would be.
> 
> In the QtC global settings for clangd, I have "Build-system warnings" 
> selected for Diagnostic configuration. In the project settings for this 
> project, "Use global settings" is checked for everything, including Clang 
> Tools and clangd. I am using the default clangd and clang-tidy executables 
> that ship with QtC.
> 
> We are suppressing quite a few warnings in our CMakeLists.txt files, and the 
> command lines I see for clang-tidy.exe don't have corresponding -Wno... 
> flags, so maybe that's the problem. If so, it's not clear to me how to work 
> around this, especially since I have "Build-system warnings" selected for 
> clangd diagnostics.
> 
> Thanks for any ideas
> 
> Adam
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Principal Software Engineer

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