C++_跨平台编译_cmakefile中_添加内容

C++_跨平台编译_cmakefile.txt中_添加内容, 包含

cmakefile.txt中

1. 系统架构(aarch64)

2. gcc g++编译器位置

3. 架构指定: march

4. 你的root一些基础的lib, bin文件路径 (YOUR_SYSROOT)

# 在x86上, 编译linux系统下 aarch64版本的库文件:

SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_SYSTEM_PROCESSOR aarch64)
SET(CMAKE_SYSROOT ${YOUR_SYSROOT})

SET(CMAKE_C_COMPILER /usr/bin/aarch64-linux-gnu-gcc-7)
SET(CMAKE_CXX_COMPILER /usr/bin/aarch64-linux-gnu-g++-7)

SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a")

# 可选:

SET(CMAKE_Fortran_COMPILER aarch64-linux-gnu-gfortran-7)
SET(CMAKE_AR aarch64-linux-gnu-ar)
SET(CMAKE_RANLIB aarch64-linux-gnu-ranlib)
SET(CMAKE_STRIP aarch64-linux-gnu-strip)

# SET(CMAKE_THREAD_LIBS_INIT "-lpthread")

注意: 若有多个 CMakefile.txt, 以上内容添加一个就可以. 

shell脚本形式

然后若不想修改CMakefile.txt, 可以使用your_shell.sh也是一样的

进入 src所在目录,  新建 your_shell.sh

如命名为"build_arm64_in_x86.sh", 内容如下: 

#!/bin/bash

MYARM_SYSROOT=/your-sysroot

# 设置环境变量

# specify cross toolchain

# SET(CMAKE_C_COMPILER /usr/bin/aarch64-linux-gnu-gcc-7)

# SET(CMAKE_CXX_COMPILER /usr/bin/aarch64-linux-gnu-g++-7)

# SET(CMAKE_Fortran_COMPILER aarch64-linux-gnu-gfortran-7)

# SET(CMAKE_AR aarch64-linux-gnu-ar)

# SET(CMAKE_RANLIB aarch64-linux-gnu-ranlib)

# SET(CMAKE_STRIP aarch64-linux-gnu-strip)

export CC=/usr/bin/aarch64-linux-gnu-gcc-7

export CXX=/usr/bin/aarch64-linux-gnu-g++-7

export FC=/usr/bin/aarch64-linux-gnu-gfortran-7

export AR=/usr/bin/aarch64-linux-gnu-ar

export RANLIB=/usr/bin/aarch64-linux-gnu-ranlib

export STRIP=/usr/bin/aarch64-linux-gnu-strip

# 其他定制设置 (可选?)

# set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a")

# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a")

export CFLAGS="-march=armv8-a"

export CXXFLAGS="-march=armv8-a"

export CMAKE_THREAD_LIBS_INIT="-lpthread"

mkdir -p build && cd build

# 调用 CMake

../cmake-3.29.2-linux-x86_64/bin/cmake --version

../cmake-3.29.2-linux-x86_64/bin/cmake \

-DCMAKE_SYSTEM_NAME=Linux \

-DCMAKE_SYSTEM_PROCESSOR=aarch64 \

-DCMAKE_SYSROOT=${MYARM_SYSROOT} \

..

# 构建步骤

make -j1