CMake 字段使用

安装到指定目录

• 实际调用的是cmake生成的cmake_install.cmake

  cmake --install . --prefix ../release
  

toolchain-aarch64.cmake

# toolchain-aarch64.cmake
set(CMAKE_SYSTEM_NAME Arm)
set(CMAKE_SYSTEM_PROCESSOR aarch64)

set(CMAKE_C_COMPILER 	aarch64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER 	aarch64-linux-gnu-g++)


# 如果有sysroot的话，一般是开发板厂家提供
# set(CMAKE_SYSROOT /path/to/aarch64/sysroot)

# 在交叉编译时优先考虑 sysroot 中的库和头文件
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

# 设置标准库和 CMake 的路径
SET(CMAKE_C_FLAGS "-march=armv8-a -O2")
SET(CMAKE_CXX_FLAGS "-march=armv8-a -O2")

CMake字段说明

字段	含义	示例
CMAKE_INSTALL_PREFIX	安装目录	cmake -DCMAKE_INSTALL_PREFIX=…/install
CMAKE_C_COMPILER	C语言编译工具	set(CMAKE_C_COMPILER aarch64-linux-gnu-gcc)
CMAKE_CXX_COMPILER	C++编译工具	set(CMAKE_CXX_COMPILER aarch64-linux-gnu-g++)
CMAKE_C_FLAGS	C语言编译参数	SET(CMAKE_C_FLAGS “-march=armv8-a -O2”)
CMAKE_CXX_FLAGS	C++编译参数	SET(CMAKE_CXX_FLAGS “-march=armv8-a -O2”)

CMake指令编译

cmake ../ -DCMAKE_C_COMPILER=aarch64-linux-gnu-gcc -DCMAKE_CXX_COMPILER=aarch64-linux-gnu-g++ \
		-DCMAKE_INSTALL_PREFIX=../install/Arm-linux 
make -j8 && make install