b3284edb36
* Android standalone toolchains are not longer necessary The latest NDK (19) contains ABI/API level specific command line tools making standalone toolchains unnecessary. This change adapts to the new model which greatly simplifies the build script and ensures the latest version of the tools is being used. Note that this requires a fairly recent version of CMake which fixes a bug related to ranlib. This change was tested with CMake 3.13 (CMake 3.7 does not work). * Modify CI build script to fetch recent CMake * Remove dependency on standalone toolchains in Windows README * Use correct CMake path * Update NDK to latest * Only download CMake and NDK for Android builds * Add version constant for ninja * Make output more quiet
80 lines
3.1 KiB
CMake
80 lines
3.1 KiB
CMake
# Copyright (C) 2018 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# For information on how to generate the toolchain, see filament/README.md
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# this one is important
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set(CMAKE_SYSTEM_NAME Linux)
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# this one not so much
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set(CMAKE_SYSTEM_VERSION 1)
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# android
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set(API_LEVEL 21)
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# architecture
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set(ARCH armv7a-linux-androideabi)
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set(AR_ARCH arm-linux-androideabi)
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set(DIST_ARCH armeabi-v7a)
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# toolchain
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string(TOLOWER ${CMAKE_HOST_SYSTEM_NAME} HOST_NAME_L)
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set(TOOLCHAIN $ENV{ANDROID_HOME}/ndk-bundle/toolchains/llvm/prebuilt/${HOST_NAME_L}-x86_64/)
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# specify the cross compiler
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set(COMPILER_SUFFIX)
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if(WIN32)
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set(COMPILER_SUFFIX ".cmd")
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set(CMAKE_AR ${TOOLCHAIN}/bin/${ARCH}-ar.exe CACHE FILEPATH "Archiver")
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endif()
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set(CMAKE_C_COMPILER ${TOOLCHAIN}/bin/${ARCH}${API_LEVEL}-clang${COMPILER_SUFFIX})
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set(CMAKE_CXX_COMPILER ${TOOLCHAIN}/bin/${ARCH}${API_LEVEL}-clang++${COMPILER_SUFFIX})
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set(CMAKE_AR ${TOOLCHAIN}/bin/${AR_ARCH}-ar${COMPILER_SUFFIX})
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set(CMAKE_RANLIB ${TOOLCHAIN}/bin/${AR_ARCH}-ranlib${COMPILER_SUFFIX})
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set(CMAKE_STRIP ${TOOLCHAIN}/bin/${AR_ARCH}-strip${COMPILER_SUFFIX})
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# where is the target environment
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set(CMAKE_FIND_ROOT_PATH ${TOOLCHAIN}/sysroot)
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# search for programs in the build host directories
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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# for libraries and headers in the target directories
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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# compiler and linker flags
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# note for gcc add:
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# C_FLAGS += -Wl,-pie
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# CXX_FLAGS += -lstdc++
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#
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# Cortex-A9 only has fpv3, but AFAIK, no Cortex-A9 has GLES 3.x capable GPU
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#
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# Krait support vfpv4
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# Cortex-A12 and Cortex-A15 ARMv7 support neon-fpv4
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# Cortex-A7 support fpv4 iif it has neon
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#
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# float ABI:
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# for softpf: CFLAGS must have -mfloat-abi=softfp
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# for hardfp: CFLAGS must have -mhard-float
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# LDFLAGS must have -Wl,--no-warn-mismatch
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#
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mthumb -march=armv7-a -mcpu=cortex-a15 -mfloat-abi=softfp -mfpu=neon-vfpv4 -DANDROID -fPIE" CACHE STRING "Toolchain CFLAGS")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_C_FLAGS}" CACHE STRING "Toolchain CXXFLAGS")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -march=armv7-a -Wl,--no-warn-mismatch -L${TOOLCHAIN}/arm-linux-androideabi/lib/armv7-a -static-libstdc++ -fPIE -pie" CACHE STRING "Toolchain LDFLAGS")
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set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -march=armv7-a -Wl,--no-warn-mismatch -L${TOOLCHAIN}/arm-linux-androideabi/lib/armv7-a -static-libstdc++" CACHE STRING "Toolchain LDFLAGS")
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set(CMAKE_POSITION_INDEPENDENT_CODE ON)
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set(ANDROID TRUE)
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