一般分隔符是/

SOURCE_TEXTdoubango
DEST_TEXT=doubango2

sed -i "s/${SOURCE_TEXT}/${DEST_TEXT}/g" Makefile

如果是路径，这时可以自行定义，比如用#

SOURCE_TEXT=/home/quantum6/telecom/doubango
DEST_TEXT=/home/quantum6/telecom/doubango2/doubango

sed -i "s#${SOURCE_TEXT}:${DEST_TEXT}#g" Makefile