RFR(S): JDK-8026964 Building with an IBM J9 boot jdk requires special settings for BOOT_RTJAR

[Kumar Srinivasan]

Hi Volker,

One thing I notieced,

BOOT_RTJAR=`$BOOT_JDK/bin/java -XshowSettings 2>&1 .......

I suggest using java -XshowSettings:props -version 2>&1 .........

props,  will narrow down the reporting to only properties section, which is
really what you want

-version, will allow the launcher to return a 0 exit value, since 
-XshowSettings
behaves like -showversion ie. another class or option is expected for 
the launcher
to continue.

Kumar


> Hi,
>
> could you please review the following small webrev:
>
> http://cr.openjdk.java.net/~simonis/webrevs/8026964/
>
> It not only fixes bug 8026964 on AIX, but is changes the general way
> of how to compute BOOT_RTJAR.
>
> With the new solution, BOOT_RTJAR is computed right from the system
> property 'sun.boot.class.path'. The new solution should be more robust
> and more portable as it doesn't depend on the name of the jar file
> which contains the boot classes and it also doesn't depend on the fact
> that all these classes are located in a single jar file.
>
> In order to avoid build warnings, I've taken extra care to remove jar
> files and paths from the 'sun.boot.class.path' output which do not
> exist (e.g. jfr.jar is not available in an OpenJDK build but appears
> in 'sun.boot.class.path' anyway - maybe this is another bug that
> should be fixed; also jre/classes appears in 'sun.boot.class.path'
> although it is not present in the file system - maybe we should fix
> that as well).
>
> If we are building on Windows, I convert the content of
> 'sun.boot.class.path'  to Unix form to avoid problems with the FIXPATH
> utility. Later, during the build, FIXPATH will convert the path list
> back to Windows form.
>
> I've tested the new Solution on Linux, Windows, Solaris and AIX and
> couldn't find any problems.
>
> I would like to put this into the ppc-aix-port/stage repository but as
> this is a general fix and if you'd like to, it would be also OK if
> you'd push it right to the build repository.
>
> Thank you and best regards,
> Volker