| # |
| # Copyright (C) 2017 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| """Constants and helper functions for NDK ABIs.""" |
| from typing import List, NewType |
| |
| |
| Arch = NewType('Arch', str) |
| Abi = NewType('Abi', str) |
| Toolchain = NewType('Toolchain', str) |
| |
| |
| LP32_ABIS = ( |
| 'armeabi-v7a', |
| 'x86', |
| ) |
| |
| |
| LP64_ABIS = ( |
| 'arm64-v8a', |
| 'x86_64', |
| ) |
| |
| |
| ALL_ABIS = sorted(LP32_ABIS + LP64_ABIS) |
| |
| |
| ALL_ARCHITECTURES = ( |
| Arch('arm'), |
| Arch('arm64'), |
| Arch('x86'), |
| Arch('x86_64'), |
| ) |
| |
| |
| ALL_TOOLCHAINS = ( |
| Toolchain('arm-linux-androideabi'), |
| Toolchain('aarch64-linux-android'), |
| Toolchain('x86'), |
| Toolchain('x86_64'), |
| ) |
| |
| |
| ALL_TRIPLES = ( |
| 'arm-linux-androideabi', |
| 'aarch64-linux-android', |
| 'i686-linux-android', |
| 'x86_64-linux-android', |
| ) |
| |
| |
| def arch_to_toolchain(arch: Arch) -> Toolchain: |
| """Returns the NDK toolchain name for the given architecture.""" |
| return dict(zip(ALL_ARCHITECTURES, ALL_TOOLCHAINS))[arch] |
| |
| |
| def arch_to_triple(arch: Arch) -> str: |
| """Returns the triple for the given architecture.""" |
| return dict(zip(ALL_ARCHITECTURES, ALL_TRIPLES))[arch] |
| |
| |
| def toolchain_to_arch(toolchain: Toolchain) -> Arch: |
| """Returns the architecture for the given toolchain.""" |
| return dict(zip(ALL_TOOLCHAINS, ALL_ARCHITECTURES))[toolchain] |
| |
| |
| def arch_to_abis(arch: Arch) -> List[Abi]: |
| """Returns the ABIs for the given architecture.""" |
| return { |
| Arch('arm'): [Abi('armeabi-v7a')], |
| Arch('arm64'): [Abi('arm64-v8a')], |
| Arch('x86'): [Abi('x86')], |
| Arch('x86_64'): [Abi('x86_64')], |
| }[arch] |
| |
| |
| def abi_to_arch(abi: Abi) -> Arch: |
| """Returns the architecture for the given ABI.""" |
| return { |
| Abi('armeabi-v7a'): Arch('arm'), |
| Abi('arm64-v8a'): Arch('arm64'), |
| Abi('x86'): Arch('x86'), |
| Abi('x86_64'): Arch('x86_64'), |
| }[abi] |
| |
| |
| def clang_target(arch: Arch, api: int = None) -> str: |
| """Returns the Clang target to be used for the given arch/API combo. |
| |
| Args: |
| arch: Architecture to compile for. 'arm' will target ARMv7. |
| api: API level to compile for. Defaults to the lowest supported API |
| level for the architecture if None. |
| """ |
| if api is None: |
| # Currently there is only one ABI per arch. |
| abis = arch_to_abis(arch) |
| assert len(abis) == 1 |
| abi = abis[0] |
| api = min_api_for_abi(abi) |
| triple = arch_to_triple(arch) |
| if arch == 'arm': |
| triple = 'armv7a-linux-androideabi' |
| return f'{triple}{api}' |
| |
| |
| def min_api_for_abi(abi: Abi) -> int: |
| """Returns the minimum supported build API for the given ABI. |
| |
| >>> min_api_for_abi('arm64-v8a') |
| 21 |
| |
| >>> min_api_for_abi('armeabi-v7a') |
| 16 |
| |
| >>> min_api_for_abi('foobar') |
| Traceback (most recent call last): |
| ... |
| ValueError: Invalid ABI: foobar |
| """ |
| if abi in LP64_ABIS: |
| return 21 |
| elif abi in LP32_ABIS: |
| return 16 |
| else: |
| raise ValueError('Invalid ABI: {}'.format(abi)) |