67 lines
2.5 KiB
CMake
67 lines
2.5 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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# architecture
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set(ARCH arm-linux-androideabi)
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set(DIST_ARCH armeabi-v7a)
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# toolchain
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set(TOOLCHAIN ${CMAKE_SOURCE_DIR}/toolchains/${CMAKE_HOST_SYSTEM_NAME}/${ARCH}-4.9)
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# specify the cross compiler
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set(CMAKE_C_COMPILER ${TOOLCHAIN}/bin/${ARCH}-clang)
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set(CMAKE_CXX_COMPILER ${TOOLCHAIN}/bin/${ARCH}-clang++)
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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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