To develop the ＣＯＭＰＩＷＡＶＥ编译器 compiler we used the ANTLR parse generator.
To install ANTLR we need to follow the following steps:
** inside the unix terminal emulator **
$ cd /usr/local/lib
$ sudo curl -O http://www.antlr.org/download/antlr-4.6-complete.jar
$ export CLASSPATH=".:/usr/local/lib/antlr-4.6-complete.jar:$CLASSPATH"
$ alias antlr4='java -jar /usr/local/lib/antlr-4.6-complete.jar'
$ alias grun='java org.antlr.v4.gui.TestRig'