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97bca2f9fa
The NDK build system now uses only a single toolchain in
<ndk>/toolchains/llvm/prebuilt/<host>
Its compilers are always `bin/{clang,clang++}` and its binutils are
always `bin/<triple>-*`. It is a standalone toolchain:
* The Anrdoid API level is specified at the end of `--target=`.
* The standard library may be specified via `-stdlib=`.
* No need to pass system includes or libraries explicitly.
* No need to pass `--sysroot` or `-gcc-toolchain`.
Teach CMake to recognize NDK versions that have a unified
toolchain with its own sysroot and use the above approach.
Fixes: #18739
50 lines
1.6 KiB
CMake
50 lines
1.6 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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# When CMAKE_SYSTEM_NAME is "Android", CMakeSystemSpecificInitialize loads this
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# module.
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# Support for NVIDIA Nsight Tegra Visual Studio Edition was previously
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# implemented in the CMake VS IDE generators. Avoid interfering with
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# that functionality for now. Later we may try to integrate this.
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if(CMAKE_VS_PLATFORM_NAME STREQUAL "Tegra-Android")
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return()
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endif()
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# Commonly used Android toolchain files that pre-date CMake upstream support
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# set CMAKE_SYSTEM_VERSION to 1. Avoid interfering with them.
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if(CMAKE_SYSTEM_VERSION EQUAL 1)
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return()
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endif()
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set(CMAKE_BUILD_TYPE_INIT Debug)
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# Skip sysroot selection if the NDK has a unified toolchain.
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if(CMAKE_ANDROID_NDK_TOOLCHAIN_UNIFIED)
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return()
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endif()
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if(NOT CMAKE_SYSROOT)
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if(CMAKE_ANDROID_NDK)
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set(CMAKE_SYSROOT "${CMAKE_ANDROID_NDK}/platforms/android-${CMAKE_SYSTEM_VERSION}/arch-${CMAKE_ANDROID_ARCH}")
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if(NOT CMAKE_ANDROID_NDK_DEPRECATED_HEADERS)
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set(CMAKE_SYSROOT_COMPILE "${CMAKE_ANDROID_NDK}/sysroot")
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endif()
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elseif(CMAKE_ANDROID_STANDALONE_TOOLCHAIN)
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set(CMAKE_SYSROOT "${CMAKE_ANDROID_STANDALONE_TOOLCHAIN}/sysroot")
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endif()
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endif()
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if(CMAKE_SYSROOT)
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if(NOT IS_DIRECTORY "${CMAKE_SYSROOT}")
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message(FATAL_ERROR
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"Android: The system root directory needed for the selected Android version and architecture does not exist:\n"
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" ${CMAKE_SYSROOT}\n"
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)
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endif()
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else()
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message(FATAL_ERROR
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"Android: No CMAKE_SYSROOT was selected."
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)
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endif()
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