Revise logic from commit 1ab574a0f4 (Android: Add support for NDK r22,
2020-10-07, v3.19.0-rc1~18^2) that loads ABI tables from the NDK.
`NDK_DEFAULT_ABIS` means the abis to build by default.
Use `NDK_KNOWN_DEVICE_ABI{32,64}S` instead.
In practise they have never been different. Fix to make it more precise.
Policy CMP0056 determines whether `CMAKE_EXE_LINKER_FLAGS` are passed
into the test project used by the source-file signature of `try_compile`.
That affects how implicit link directories are detected, so we need to
also honor the policy for the source-directory signature of `try_compile`
used in FortranCInterface in order to get matching link directories.
Fixes: #21408
Extend the change from commit 23cd98a66a (FindPython: Add support of
version 3.10, 2020-10-16, v3.19.0-rc2~25^2) to cover the legacy
`FindPython{Interp,Libs}` modules too.
1. Set CMAKE_FIND_ROOT_PATH unconditionally.
Revise the implementation from commit a7f41a7ee4 (Android: Fix find_*
search order within NDK for unified toolchains, 2020-10-13). In the old
implementation, if people set CMAKE_FIND_ROOT_PATH, CMAKE_ANDROID_NDK
won't be added to find root. And all paths added to CMAKE_SYSTEM_*_PATH
below will be rerooted to the user specified root.
2. Add api level specific library path to CMAKE_SYSTEM_PREFIX_PATH.
As the discussion in [1], some people want the paths added by
UnixPaths.cmake. They install their libraries according to
GNUInstallDirs [2].
As a result, we cannot clear CMAKE_SYSTEM_PREFIX_PATH. It includes /usr
so no matter what we specify in CMAKE_SYSTEM_LIBRARY_PATH,
/usr/lib/<arch> will be searched first.
The author also pointed out a way to solve this issue [3]. In addition
to other paths, CMake also searches <root>/<prefix> [4]. So we can add
the API specific lib path to the beginning of CMAKE_SYSTEM_PREFIX_PATH,
to have it searched first.
[1] https://android-review.googlesource.com/c/platform/ndk/+/1486800
[2] https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html
[3] https://github.com/android/ndk/issues/1179#issuecomment-613435081
[4] 11425041f0/Source/cmSearchPath.cxx (L202)
fcc89bda1d TestBigEndian: Re-implement using byte order detected from ABI check
412ce907a2 Tests: Prepare RunCMake.ABI cases to run more checks
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !5477
Extend the `.tbd` parsing from commit 170e598add (iOS: Fix detection of
supported SDK architectures, 2020-04-16, v3.17.2~11^2) to support `.tbd`
file version 4.
a61007b3b0 Tests: Add RunCMake.GNUInstallDirs case for get_absolute_install_dir
229b5ee994 GNUInstallDirs: Add dir argument to GNUInstallDirs_get_absolute_install_dir
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !5450
4dca078829 Android: Link c++abi and android_support when necessary
738caa4d48 Android: Add options to control exceptions/rtti
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !5444
For older NDKs we used `__android_stl_lib` to link these libraries, but
the `CMAKE_ANDROID_NDK_TOOLCHAIN_UNIFIED` code path does not use that.
Link the libraries the way the NDK toolchain file does:
43b2de34ef/build/cmake/android.toolchain.cmake (368)
With the NDK's `android.toolchain.cmake`, the user can control whether
exceptions/rtti is enabled using `ANDROID_CPP_FEATURES`:
43b2de34ef/build/cmake/android.toolchain.cmake (548)
Add `CMAKE_ANDROID_RTTI` and `CMAKE_ANDROID_EXCEPTIONS` to support that.
