RFR: 6889: Provide build script for making it easier to build JMC [v3]

[Schalli1987]

On Mon, 14 Sep 2020 12:07:42 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> Sorry it's been a while...
>> Finally I added OSTYPE checks (can someone with a MAC confirm that its working?) and some preconditions for java and
>> maven. Also a --run option was added that can be called after --packageJmc.
>> Since JAVA_HOME is no longer set in JDK 11 and above, I'd use the system executable java instead.
>
> Tried running on Mac:
> 14:06:23 building p2:site - logging output to
> /Users/marcus.hirt/git/myrepos/jmcreviews/Schalli1987/jmc/target/build_20200914140619.1.p2_site.log WARNING: An illegal
> reflective access operation has occurred WARNING: Illegal reflective access by
> org.codehaus.groovy.reflection.CachedClass
> (file:/Users/marcus.hirt/.m2/repository/org/codehaus/groovy/groovy-all/2.4.8/groovy-all-2.4.8.jar) to method
> java.lang.Object.finalize() WARNING: Please consider reporting this to the maintainers of
> org.codehaus.groovy.reflection.CachedClass WARNING: Use --illegal-access=warn to enable warnings of further illegal
> reflective access operations WARNING: All illegal access operations will be denied in a future release 14:06:33 run
> jetty - logging output to
> /Users/marcus.hirt/git/myrepos/jmcreviews/Schalli1987/jmc/target/build_20200914140619.2.jetty.log ps: illegal
> option -- - usage: ps [-AaCcEefhjlMmrSTvwXx] [-O fmt | -o fmt] [-G gid[,gid...]]
>           [-g grp[,grp...]] [-u [uid,uid...]]
>           [-p pid[,pid...]] [-t tty[,tty...]] [-U user[,user...]]
>        ps [-L]

Which version of ps do you use?
I have
$ ps --version
ps from procps-ng 3.3.16
The `--ppid` option was added in 3.1.6 back in 2003?

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PR: https://git.openjdk.java.net/jmc/pull/100