1*1c60b9acSAndroid Build Coastguard Worker# 2*1c60b9acSAndroid Build Coastguard Worker# CMake Toolchain file for crosscompiling Android / aarch64 3*1c60b9acSAndroid Build Coastguard Worker# 4*1c60b9acSAndroid Build Coastguard Worker# This can be used when running cmake in the following way: 5*1c60b9acSAndroid Build Coastguard Worker# cd build/ 6*1c60b9acSAndroid Build Coastguard Worker# cmake .. -DCMAKE_TOOLCHAIN_FILE=contrib/cross-aarch64-android.cmake 7*1c60b9acSAndroid Build Coastguard Worker# 8*1c60b9acSAndroid Build Coastguard Worker 9*1c60b9acSAndroid Build Coastguard Worker 10*1c60b9acSAndroid Build Coastguard Workerset(ANDROID_API_VER 24) 11*1c60b9acSAndroid Build Coastguard Workerset(ABARCH1 arm64) 12*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_SYSTEM_PROCESSOR aarch64) 13*1c60b9acSAndroid Build Coastguard Workerset(NDK /opt/android/ndk/21.1.6352462/) 14*1c60b9acSAndroid Build Coastguard Workerset(CROSS_SYSROOT "${NDK}/platforms/android-${ANDROID_API_VER}/arch-${ABARCH1}") 15*1c60b9acSAndroid Build Coastguard Workerset(BUILD_ARCH linux-x86_64) 16*1c60b9acSAndroid Build Coastguard Worker 17*1c60b9acSAndroid Build Coastguard Worker# 18*1c60b9acSAndroid Build Coastguard Worker# Rest should be computed from the above 19*1c60b9acSAndroid Build Coastguard Worker# 20*1c60b9acSAndroid Build Coastguard Workerset(TC_PATH ${NDK}/toolchains/llvm/prebuilt/${BUILD_ARCH}) 21*1c60b9acSAndroid Build Coastguard Workerset(TC_BASE ${TC_PATH}/bin/${CMAKE_SYSTEM_PROCESSOR}-linux-android) 22*1c60b9acSAndroid Build Coastguard Workerset(PLATFORM android) 23*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_SYSTEM_NAME Linux) 24*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_C_COMPILER "${TC_BASE}${ANDROID_API_VER}-clang") 25*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_CXX_COMPILER "${TC_BASE}${ANDROID_API_VER}-clang++") 26*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_STAGING_PREFIX "${CROSS_SYSROOT}") 27*1c60b9acSAndroid Build Coastguard Worker 28*1c60b9acSAndroid Build Coastguard Worker# 29*1c60b9acSAndroid Build Coastguard Worker# Different build system distros set release optimization level to different 30*1c60b9acSAndroid Build Coastguard Worker# things according to their local policy, eg, Fedora is -O2 and Ubuntu is -O3 31*1c60b9acSAndroid Build Coastguard Worker# here. Actually the build system's local policy is completely unrelated to 32*1c60b9acSAndroid Build Coastguard Worker# our desire for cross-build release optimization policy for code built to run 33*1c60b9acSAndroid Build Coastguard Worker# on a completely different target than the build system itself. 34*1c60b9acSAndroid Build Coastguard Worker# 35*1c60b9acSAndroid Build Coastguard Worker# Since this goes last on the compiler commandline we have to override it to a 36*1c60b9acSAndroid Build Coastguard Worker# sane value for cross-build here. Notice some gcc versions enable broken 37*1c60b9acSAndroid Build Coastguard Worker# optimizations with -O3. 38*1c60b9acSAndroid Build Coastguard Worker# 39*1c60b9acSAndroid Build Coastguard Workerif (CMAKE_BUILD_TYPE MATCHES RELEASE OR CMAKE_BUILD_TYPE MATCHES Release OR CMAKE_BUILD_TYPE MATCHES release) 40*1c60b9acSAndroid Build Coastguard Worker set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O2") 41*1c60b9acSAndroid Build Coastguard Worker set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2") 42*1c60b9acSAndroid Build Coastguard Workerendif() 43*1c60b9acSAndroid Build Coastguard Worker 44*1c60b9acSAndroid Build Coastguard Worker#-nostdlib 45*1c60b9acSAndroid Build Coastguard WorkerSET(CMAKE_C_FLAGS "-DGCC_VER=\"\\\"$(GCC_VER)\\\"\" -DARM64=1 -D__LP64__=1 -Os -g3 -fpie -mstrict-align -fPIC -ffunction-sections -fdata-sections -D__ANDROID_API__=${ANDROID_API_VER} -Wno-pointer-sign" CACHE STRING "" FORCE) 46*1c60b9acSAndroid Build Coastguard Worker 47*1c60b9acSAndroid Build Coastguard Worker 48*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_FIND_ROOT_PATH "${CROSS_SYSROOT}") 49*1c60b9acSAndroid Build Coastguard Worker 50*1c60b9acSAndroid Build Coastguard Worker# Adjust the default behavior of the FIND_XXX() commands: 51*1c60b9acSAndroid Build Coastguard Worker# search programs in the host environment only. 52*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) 53*1c60b9acSAndroid Build Coastguard Worker 54*1c60b9acSAndroid Build Coastguard Worker# Search headers and libraries in the target environment only. 55*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) 56*1c60b9acSAndroid Build Coastguard Workerset(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) 57*1c60b9acSAndroid Build Coastguard Worker 58*1c60b9acSAndroid Build Coastguard Worker 59