Liu Yiqun
8 years ago
parent
e0a4668459
commit
d7d2a4f700
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# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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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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# This is a toolchain file for cross-compiling for Android, and the
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# configuration refers to the open-source resposity:
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# https://github.com/taka-no-me/android-cmake
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# Most of the variables are compatible with that used in
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# https://developer.android.com/ndk/guides/cmake.html
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# The supported are listed belows:
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#
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# ANDROID_STANDALONE_TOOLCHAIN
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# ANDROID_ABI
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# ANDROID_NATIVE_API_LEVEL
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# ANDROID_PLATFORM
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# ANDROID_ARM_MODE
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# ANDROID_ARM_NEON
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#
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# For CMake >= 3.7.0, all the settings will be delivered to CMake system
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# variables to let CMake do the cross-compiling configurations itself.
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# More detail of cross-compiling settings
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# https://cmake.org/cmake/help/v3.7/manual/cmake-toolchains.7.html
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IF(NOT ANDROID)
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return()
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ENDIF()
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# check the exist of android standalone toolchain
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IF(NOT DEFINED ANDROID_STANDALONE_TOOLCHAIN)
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SET(ANDROID_STANDALONE_TOOLCHAIN $ENV{ANDROID_STANDALONE_TOOLCHAIN}
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CACHE PATH "Folder holds the standalone toolchain of Android NDK")
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ENDIF()
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IF(NOT ANDROID_STANDALONE_TOOLCHAIN)
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MESSAGE(FATAL_ERROR "Set ANDROID_STANDALONE_TOOLCHAIN to use a standalone toolchain.\n"
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"To cross-compile for Android, you need to:\n"
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"1. Download an Android NDK from"
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" https://developer.android.com/ndk/downloads/index.html\n"
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"2. Setup a standalone toolchain"
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" https://developer.android.google.cn/ndk/guides/standalone_toolchain.html?hl=zh-cn")
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ENDIF()
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IF(DEFINED ANDROID_NATIVE_API_LEVEL)
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IF(ANDROID_NATIVE_API_LEVEL MATCHES "^android-[0-9]+$")
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STRING(REPLACE "android-" "" CMAKE_SYSTEM_VERSION "${CMAKE_MATCH_0}")
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ELSEIF(ANDROID_NATIVE_API_LEVEL MATCHES "^[0-9]+$")
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SET(CMAKE_SYSTEM_VERSION ${ANDROID_NATIVE_API_LEVEL})
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ENDIF()
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SET(ANDROID_PLATFORM android-${CMAKE_SYSTEM_VERSION})
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ENDIF()
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IF(NOT DEFINED ANDROID_ABI)
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SET(ANDROID_ABI "armeabi-v7a")
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ENDIF()
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IF(NOT DEFINED ANDROID_ARM_MODE)
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SET(ANDROID_ARM_MODE ON)
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ENDIF()
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IF(NOT DEFINED ANDROID_ARM_NEON)
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SET(ANDROID_ARM_NEON ON)
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ENDIF()
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IF(NOT ANDROID_ARM_MODE OR ANDROID_ARM_MODE STREQUAL "thumb")
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SET(ANDROID_ARM_MODE OFF)
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SET(ANDROID_ARM_MODE_NAME "thumb")
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ELSEIF(ANDROID_ARM_MODE OR ANDROID_ARM_MODE STREQUAL "arm")
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SET(ANDROID_ARM_MODE ON)
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SET(ANDROID_ARM_MODE_NAME "arm")
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ENDIF()
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IF(${CMAKE_VERSION} VERSION_LESS "3.7.0")
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IF(${CMAKE_VERSION} VERSION_LESS "3.1.0")
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SET(CMAKE_SYSTEM_NAME "Linux")
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ENDIF()
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MESSAGE(WARNING "It is recommended to use CMake >= 3.7.0 (current version: "
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"${CMAKE_VERSION}), when cross-compiling for Android.")
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SET(CMAKE_SYSROOT "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot")
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IF(NOT CMAKE_SYSTEM_VERSION)
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SET(ANDROID_STANDALONE_TOOLCHAIN_API "")
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SET(ANDROID_API_LEVEL_H_REGEX "^[\t ]*#[\t ]*define[\t ]+__ANDROID_API__[\t ]+([0-9]+)")
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FILE(STRINGS "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot/usr/include/android/api-level.h"
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ANDROID_API_LEVEL_H_CONTENT REGEX "${ANDROID_API_LEVEL_H_REGEX}")
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IF(ANDROID_API_LEVEL_H_CONTENT MATCHES "${ANDROID_API_LEVEL_H_REGEX}")
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SET(ANDROID_STANDALONE_TOOLCHAIN_API "${CMAKE_MATCH_1}")
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ENDIF()
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SET(CMAKE_SYSTEM_VERSION ${ANDROID_STANDALONE_TOOLCHAIN_API})
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ENDIF()
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# Toolchain
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SET(ANDROID_TOOLCHAIN "gcc")
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SET(ANDROID_TOOLCHAIN_ROOT ${ANDROID_STANDALONE_TOOLCHAIN})
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IF(ANDROID_ABI MATCHES "^armeabi(-v7a)?$")
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SET(ANDROID_TOOLCHAIN_NAME arm-linux-androideabi)
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IF(ANDROID_ABI STREQUAL "armeabi")
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SET(CMAKE_SYSTEM_PROCESSOR armv5te)
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ELSEIF(ANDROID_ABI STREQUAL "armeabi-v7a")
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SET(CMAKE_SYSTEM_PROCESSOR armv7-a)
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ENDIF()
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ENDIF()
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SET(ANDROID_TOOLCHAIN_PREFIX "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_NAME}-")
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SET(CMAKE_C_COMPILER "${ANDROID_TOOLCHAIN_PREFIX}gcc")
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SET(CMAKE_CXX_COMPILER "${ANDROID_TOOLCHAIN_PREFIX}g++")
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# Toolchain and ABI specific flags.
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SET(ANDROID_COMPILER_FLAGS "-ffunction-sections -fdata-sections -finline-limit=64")
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SET(ANDROID_LINKER_FLAGS "-Wl,--gc-sections")
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IF(ANDROID_ABI STREQUAL "armeabi")
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LIST(APPEND ANDROID_COMPILER_FLAGS
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-march=armv5te
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-mtune=xscale
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-msoft-float)
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ENDIF()
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IF(ANDROID_ABI STREQUAL "armeabi-v7a")
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LIST(APPEND ANDROID_COMPILER_FLAGS
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-march=armv7-a
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-mfloat-abi=softfp)
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IF(ANDROID_ARM_NEON)
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LIST(APPEND ANDROID_COMPILER_FLAGS -mfpu=neon)
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ELSE()
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LIST(APPEND ANDROID_COMPILER_FLAGS -mfpu=vfpv3-d16)
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ENDIF()
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LIST(APPEND ANDROID_LINKER_FLAGS -Wl,--fix-cortex-a8)
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ENDIF()
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IF(ANDROID_ABI MATCHES "^armeabi(-v7a)?$")
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IF(ANDROID_ARM_MODE)
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LIST(APPEND ANDROID_COMPILER_FLAGS -marm)
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ELSE()
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LIST(APPEND ANDROID_COMPILER_FLAGS -mthumb)
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ENDIF()
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ENDIF()
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STRING(REPLACE ";" " " ANDROID_COMPILER_FLAGS "${ANDROID_COMPILER_FLAGS}")
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STRING(REPLACE ";" " " ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS}")
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SET(CMAKE_C_FLAGS "${ANDROID_COMPILER_FLAGS} ${CMAKE_C_FLAGS}"
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CACHE STRING "c flags")
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SET(CMAKE_CXX_FLAGS "${ANDROID_COMPILER_FLAGS} ${CMAKE_CXX_FLAGS}"
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CACHE STRING "c++ flags")
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SET(CMAKE_SHARED_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}"
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CACHE STRING "shared linker flags")
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SET(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
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SET(CMAKE_EXE_LINKER_FLAGS "-pie -fPIE ${ANDROID_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}"
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CACHE STRING "executable linker flags")
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MESSAGE(STATUS "Android: Targeting API '${CMAKE_SYSTEM_VERSION}' "
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"with architecture '${ANDROID_ARM_MODE_NAME}', "
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"ABI '${ANDROID_ABI}', and processor '${CMAKE_SYSTEM_PROCESSOR}'")
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MESSAGE(STATUS "System CMAKE_C_FLAGS: " ${CMAKE_C_FLAGS})
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MESSAGE(STATUS "System CMAKE_CXX_FLAGS: " ${CMAKE_CXX_FLAGS})
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ELSE()
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SET(CMAKE_ANDROID_STANDALONE_TOOLCHAIN ${ANDROID_STANDALONE_TOOLCHAIN})
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SET(CMAKE_ANDROID_ARCH_ABI ${ANDROID_ABI})
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SET(CMAKE_ANDROID_ARM_MODE ${ANDROID_ARM_MODE})
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SET(CMAKE_ANDROID_ARM_NEON ${ANDROID_ARM_NEON})
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ENDIF()
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