#!/bin/bash
# Program
# This program config olt products type
# Version V1.0
# Author zhaoxiaohu
#History
#2018/01/29 First release
export SWHOME=$(cd `dirname $0`;pwd)
echo "export SWHOME=$SWHOME"
echo ""
echo "[1] make EPON"
echo "[2] make XGEPON"
echo "[0] make clean"
read -p "Select Product Type NO.:" ProductType
# 1代表epon，2代表xgepon，3代码clean
if [ $ProductType -eq 1 ];then
PRODUCT=EPON
PRODUCT_TYPE=EPON
elif [ $ProductType -eq 2 ];then
PRODUCT=XGEPON
PRODUCT_TYPE=XGEPON
elif [ $ProductType -eq 0 ];then
make clean
echo "============================="
echo "Make Clean Successfully!!"
echo "============================="
exit 0
else
echo "Select Error!"
exit 0
fi
echo "You select make ${PRODUCT}"
read LINE_READ < ${SWHOME}/products_config.h
LINE_WRITE="#define PRODUCT_CLASS PRODUCTS_${PRODUCT}"
# 生成.h文件，里面#define 你的选择
if [ "$LINE_READ" != "$LINE_WRITE" ]
then
echo -e "$LINE_WRITE" > ${SWHOME}/products_config.h
fi
function make_product(){
if make $1
then
echo "============================="
echo "make ${PRODUCT} successfully!!"
echo "============================="
else
echo "====================="
echo "make ${PRODUCT} error!"
echo "====================="
fi
}
sleep 1
if [ ${PRODUCT} == "EPON" ]
then
make_product "v=EPON"
elif [ ${PRODUCT} == "XGEPON" ]
then
make_product "v=XGEPON"
else
echo "Select Error!"
exit 0
fi解释：这个方法是一个简单的区分不同设备去执行不同代码段；还有一种在Makefile中定义宏的方法。
目的：我现在要区分两个不同的设备，xgepon和epon，通过执行这个脚本的选项，你可以生成一个文件
/products_config.h
这个文件里会有你选择的两个宏的其中一个，对应你的选项的宏，你在要区分的文件中包含这个文件，#if就可以。
一个区分不同设备的脚本
原文：http://blog.51cto.com/zhaoxiaohu/2122151
