如何写兼容ARM和X86的编译脚本（Makefile、CMakeLists.txt、shell脚本）

编译兼容主要包括3个方面，1. CMakeLists.txt 兼容，2. Makefile 兼容，3. shell兼容

1. CMakeLists.txt

IF(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64")
    SET(CMAKE_CXX_FLAGS "-fPIC -DLINUX -m64 -Wall -Wno-unused-function -Wno-unused-parameter -std=c++11 ")
ELSEIF(CMAKE_HOST_SYSTEM_PROCESSOR MATCHS "aarch64")
    SET(CMAKE_CXX_FLAGS "-fPIC -DLINUX -march=armv8-a -mabi=lp64 -mtune=tsv110 -fsigned-char -Wall -Wno-unused-function -Wno-unused-parameter -std=c++11 ")
ELSE()
    SET(CMAKE_CXX_FLAGS "-fPIC -DLINUX -Wall -Wno-unused-function -Wno-unused-parameter -std=c++11 ")
ENDIF()

2. Makefile

ifeq ($(shell arch), aarch64)
    CPPFLAGS=-g -O2 -march=armv8-a -mabi=lp64 -mtune=tsv110 -fsigned-char
else
    CPPFLAGS=-g -O2 -m64
endif

3. shell

!/bin/bash
get_arch=`arch`
if [[ $get_arch =~ "x86_64" ]];then
    echo "this is x86_64"
elif [[ $get_arch =~ "aarch64" ]];then
    echo "this is arm64"
elif [[ $get_arch =~ "mips64" ]];then
    echo "this is mips64"
else
    echo "unknown!!"
fi