[Development] Failed to run configure.bat in qt/qt5 on MINGW64/MSYS2 shell?

[Haowei Hsu]

Hello, Qt Development Team.

It's been a while since the last time we discuss this issue.
And recently, I re-tried to configure qt-6.2.4 with msys2/mingw64 shell.
However, it still failed with the same error again:

Configuring 'qttools'
> -- CMAKE_BUILD_TYPE was set to: 'Release'
> -- Performing Test HAVE_FFI_CALL
> -- Performing Test HAVE_FFI_CALL - Success
> -- Found FFI: C:/msys64/mingw64/lib/libffi.dll.a
> -- Found ZLIB: C:/msys64/mingw64/lib/libz.dll.a (found version
> "1.3.#define ZLIB_VERSION "1.3"")
> CMake Error at C:/msys64/mingw64/lib/cmake/zstd/zstdTargets.cmake:42
> (message):
>   Some (but not all) targets in this export set were already defined.


>   Targets Defined: zstd::libzstd_static


>   Targets not yet defined: zstd::libzstd_shared


> Call Stack (most recent call first):
>   C:/msys64/mingw64/lib/cmake/zstd/zstdConfig.cmake:1 (include)
>   qtbase/cmake/FindZSTD.cmake:21 (find_package)
>   C:/msys64/mingw64/lib/cmake/llvm/LLVMConfig.cmake:269 (find_package)
>   C:/msys64/mingw64/lib/cmake/clang/ClangConfig.cmake:10 (find_package)
>   qttools/cmake/FindWrapLibClang.cmake:14 (find_package)
>   qtbase/cmake/QtFindPackageHelpers.cmake:130 (find_package)
>   qttools/configure.cmake:19 (qt_find_package)
>   qtbase/cmake/QtFeature.cmake:573 (include)
>   qttools/src/CMakeLists.txt:21 (qt_feature_evaluate_features)


>
> -- Configuring incomplete, errors occurred!
> CMake Error at
> D:/Repo/tmp/qt-6.2.4/qtbase/cmake/QtProcessConfigureArgs.cmake:957
> (message):
>   CMake exited with code 1.


After reading the log, I think it is because the configure process called
find_package(zstd) twice:

   1. The 1st time happens when configuring 'qtbase'
   2. The 2nd time happens when configuring 'qttools'

Let's why the 2nd time thinks the 'zstd::libzstd_static' target is already
defined.
If so, I wondered whether you have any solution to the cause of this
zstd-relared error?

---
Haowei Hsu

Haowei Hsu <hwhsu1231 at gmail.com> 於 2023年8月25日 週五 下午4:31寫道：

> Hello, Dennis.
> I followed the command you provided:
>
> *../../configure -release -developer-build -nomake examples -nomake tests
>> -- -DFEATURE_system_zlib=OFF*
>
>
> However, it still failed.
> You can see the attachment with the full log:
> *log-still-failed-with-feature-system-zlib-off.txt*
> ---
> Haowei Hsu
>
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