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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
21 lines
758 B
ReStructuredText
21 lines
758 B
ReStructuredText
CMAKE_ANDROID_NDK_TOOLCHAIN_VERSION
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-----------------------------------
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When :ref:`Cross Compiling for Android with the NDK`, this variable
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may be set to specify the version of the toolchain to be used
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as the compiler.
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On NDK r19 or above, this variable must be unset or set to ``clang``.
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On NDK r18 or below, this variable must be set to one of these forms:
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* ``<major>.<minor>``: GCC of specified version
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* ``clang<major>.<minor>``: Clang of specified version
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* ``clang``: Clang of most recent available version
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A toolchain of the requested version will be selected automatically to
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match the ABI named in the :variable:`CMAKE_ANDROID_ARCH_ABI` variable.
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If not specified, the default will be a value that selects the latest
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available GCC toolchain.
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