It broke drive-less (no C:\ prefix) paths passed to configure.
Invoking configure on Windows with the following args
qtbase/configure --
-DCMAKE_INSTALL_PREFIX=\Users\qt\work\install
called CMake with
-DCMAKE_INSTALL_PREFIX=\\Users\\qt\\work\\install
saying
Qt will be installed into '//Users/qt/work/install'
and while the build succeeded, installation would fail with
CMake Error at cmake_install.cmake:41 (file):
file cannot create directory:
//Users/qt/work/install/lib/cmake/Qt6BuildInternals. Maybe need
administrative privileges.
Note the double slash in the beginning is likely interpreted as a
Windows share URI / UNC path.
The same would happen when passing -prefix '\Users\qt\work\install'
As a reminder, we want to support drive-less prefix paths because
that's what Qt's Coin CI uses passes to ensure DESTDIR installation
works correctly.
Amends cb7f4030bc
Pick-to: 6.2 6.3
Fixes: QTBUG-94366
Change-Id: I9267b6f784babfbdaeafc65267ba96c75fa24112
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
7cc5fbe424