Add basic android multi-abi support for CMake projects

Use CMake external project to crosscompile android libraries for
mutliple android ABIs at the same time.
The idea behind is to use pre-compiled Qt for each android ABI in
external projects, compile libraries and then utilize results of
compilation in common androiddeployqt call.

By default multi-abi build uses the main ABI that qt toolchain file
belongs to. The list of the autodetected Qt for Android ABIs is stored
in QT_DEFAULT_ANDROID_ABIS cache variable. Users may change the set of
the Android ABIs project-wide using QT_ANDROID_ABIS CMake variable or
for the specific target by adding the ANDROID_ABIS argument when
calling qt6_add_executable. To enable build for the autodetected ABIs
user may set the QT_ANDROID_BUILD_ALL_ABIS option to TRUE.

By default build procedure is looking for the respective android_<abi>
folders to run per-abi build. If user's Qt for Android folder structure
is different then one is created by Qt installer, path to the each
Qt for Android might be overwritten using QT_PATH_ANDROID_ABI_<abi>
CMake variable.

Note: This only adds support for the multi-abi build of user's
applications.

TODO: This commit limits projects to not have in-tree library
dependencies. That means that executable targets may have
dependencies only from Qt directories or android sysroots.
See QTBUG-94714 for details.

[ChangeLog][Android][Platform Specific Changes] Added basic support
for multi-abi builds of user projects.

Task-number: QTBUG-88841
Change-Id: I3239ffe61e6b437e170c8decc5c36a9e774ed0fb
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

0 files changed, 0 insertions, 0 deletions