[Development] Failed to run configure.bat in qt/qt5 repository on Windows?

[Cristian Adam]

Hi,

You almost got it. There is one more gotcha. The Qt LLVM prebuilt binaries are Release builds.
You have tried a Debug build with MSVC, which doesn't work, due to the MSVC's C++ STL which is incompatible between Debug and Release build.

Note that a MinGW build would have been fine, you don't have this issue with MinGW.

Also note that you don't have to pass the -DFEATURE_clangcpp=TRUE flag, the Qt's configuration step should do this automatically.

For best results on Windows do pass paths in CMake native format (the Unix format)  -DCMAKE_PREFIX_PATH="C:/Program Files/libclang"

In the log file I've noticed Strawberry Perl, which is known to break things especially with MinGW builds. Make sure to pass -DCMAKE_IGNORE_PREFIX_PATH=C:/strawberry/c if you do a MinGW build.

Cheers,
Cristian

________________________________
From: Haowei Hsu <hwhsu1231 at gmail.com>
Sent: Friday, August 18, 2023 08:26
To: Cristian Adam <cristian.adam at qt.io>
Cc: Qt development mailing list <development at qt-project.org>
Subject: Re: [Development] Failed to run configure.bat in qt/qt5 repository on Windows?

Hello, Cristian.
I downloaded and unzipped the libclang-release-xxx-windows-2019.7z from https://download.qt.io<https://download.qt.io/development_releases/prebuilt/libclang/qt/>.
This is where I unzipped the libclang: "C:\Program Files\libclang".

[image.png]

However, I found that even though I specify -DCMAKE_PREFIX_PATH="C:\Program Files\libclang",
libclang still cannot be found.

[image.png]

The following commands are what I run:

  1.  ..\configure.bat -developer-build -skip qtpositioning -- -DFEATURE_clangcpp=TRUE -DCMAKE_PREFIX_PATH="C:\Program Files\libclang"

You can see the attachment with the full log: log-failed-to-find-libclang.txt
---
Haowei Hsu

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