Error: hidden visibility cannot be applied to 'dllexport' declaration

[moi15moi]

I'm not sure if I am doing something wrong or if pybind11 has a bug, but when I use the clang toolchain (mingw-w64-clang-x86_64-toolchain) on msys2 and I try to compile my program, I get this error:

[2323/2328] Compiling C++ object video_timestamps/video_provider/best_source_video_provider.cp39-win_amd64.pyd.p/best_source_video_provider.cpp.obj
FAILED: [code=1] video_timestamps/video_provider/best_source_video_provider.cp39-win_amd64.pyd.p/best_source_video_provider.cpp.obj 
"c++" "-Ivideo_timestamps\video_provider\best_source_video_provider.cp39-win_amd64.pyd.p" "-Ivideo_timestamps\video_provider" "-I..\video_timestamps\video_provider" "-I..\subprojects\bestsource\src" "-Isubprojects\ffmpeg" "-I..\subprojects\ffmpeg" "-IC:\Users\runneradmin\AppData\Local\pypa\cibuildwheel\Cache\nuget-cpython\python.3.9.13\tools\Include" "-ID:\a\_temp\msys64\tmp\build-env-uok5tlbp\lib\site-packages\pybind11\include" "-fvisibility=hidden" "-fvisibility-inlines-hidden" "-fdiagnostics-color=always" "-DNDEBUG" "-D_FILE_OFFSET_BITS=64" "-Wall" "-Winvalid-pch" "-std=c++17" "-O3" "-DMS_WIN64=1" "-pthread" -MD -MQ video_timestamps/video_provider/best_source_video_provider.cp39-win_amd64.pyd.p/best_source_video_provider.cpp.obj -MF "video_timestamps\video_provider\best_source_video_provider.cp39-win_amd64.pyd.p\best_source_video_provider.cpp.obj.d" -o video_timestamps/video_provider/best_source_video_provider.cp39-win_amd64.pyd.p/best_source_video_provider.cpp.obj "-c" ../video_timestamps/video_provider/b
In file included from ../video_timestamps/video_provider/best_source_video_provider.cpp:1:
D:\a\_temp\msys64\tmp\build-env-uok5tlbp\lib\site-packages\pybind11\include/pybind11/pybind11.h:3334:20: error: hidden visibility cannot be applied to 'dllexport' declaration
 3334 | error_already_set::m_fetched_error_deleter(detail::error_fetch_and_normalize *raw_ptr) {
      |                    ^
D:\a\_temp\msys64\tmp\build-env-uok5tlbp\lib\site-packages\pybind11\include/pybind11/pybind11.h:3340:39: error: hidden visibility cannot be applied to 'dllexport' declaration
 3340 | inline const char *error_already_set::what() const noexcept {
      |                                       ^
2 errors generated.

For more log, see my CI: https://github.com/moi15moi/VideoTimestamps/actions/runs/16232498781/job/45837840044?pr=14
You can see the CI job here: https://github.com/moi15moi/VideoTimestamps/blob/8524149a829e9aeb47edbfaaf090c4ecfdb5b1b5/.github/workflows/run_test.yml#L10-L87

I have no idea if it is a bug from meson or pybind11. Note that I don't have this issue if I dont use the clang toolchain.

[moi15moi]

Oh, this seems to be a bug because I don't have this problem with the version 2.13.6. I only have it on the version 3.0.0.

[moi15moi]

Fixed by: #5757 (comment)