Previously if
-extprefix /tmp/sysroot (CMAKE_STAGING_PREFIX)
-developer-build (FEATURE_developer_build)
were specified, but
-prefix (CMAKE_INSTALL_PREFIX)
was not,
the build system would set the CMAKE_INSTALL_PREFIX to the
qtbase build dir.
Then, if targeting desktop, this would be considered a non-prefix
build (ninja install would refuse to work), whereas in a cross-build
it would be considered an installable build.
In both cases though, the rpath of installed binaries would point to
the qtbase build dir (because CMAKE_INSTALL_PREFIX would be set to the
qtbase build dir).
This is quite confusing behavior, in more than one way.
Change the build system to consider that an explicit -extprefix should
cause Qt to always be installed, even if -developer-build is
specified.
This means the installed rpaths and on-device install prefix
(CMAKE_INSTALL_PREFIX) will now use the default computed install
prefix, e.g. /usr/local/Qt
It also means that to get a non-installable developer + custom staging
and install (on-device) prefix build, users will have to be explicit
and set all the options
-extprefix ~/qt/qtbase_build_dir
-prefix /usr
-developer-build
Pick-to: 6.2 6.3
Change-Id: Ib560452a4b4778860e0fd7666c76f8a6745773ee
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
5059f7adc2