Porting Hotspot to other platforms / OS'es

[Tom Rodriguez]

There is some support in hotspot for rsh'ing to other machines for these 
bootstrap parts.  There's a variable called REMOTE that prefixes the 
java dependent parts of the makefile and you should be able to use rsh 
or ssh to run the needed commands on a remote machine.  Obviously the 
build area would need to be reachable from the remote machine and you'd 
need to the execute the command in the proper build directory, so you 
might need a wrapper script to do the remoting.

tom

Kelly O'Hair wrote:
> I see Andrew posted a reply...
> 
> In general, there is a basic build dependency of building the JDK on having
> a previously built JDK, often called the BOOT JDK.
> 
> But for hotspot (a part of the JDK), the BOOT JDK dependency is a little
> unusual.
> The hotspot repository does need to compile up some Java source for the
> Serviceability Agent, but that could be skipped if what you were after was
> just a libjvm.so (just the native hotspot C++ shared library), or you could
> compile up that java agent source on a different machine, a class file is a
> class file, doesn't matter who creates it.
> 
> But to build libjvm.so, some of the JVM TI code (Tools Interface) needs
> to be generated, and that is done with XML/XSLT, however that generation
> should be able to be done on some other machine.
> 
> I don't have any easy recipes, but I know it's possible.
> 
> Maybe if you built hotspot on a known build machine, then deleted the
> .o and .so files, and tried building on the unknown machine?
> 
> -kto
> 
> Michael Neuweiler wrote:
>> Hi,
>>
>> I wanted to start porting OpenJDK to Syllable on Intel32 but got stuck 
>> with the chicken and egg problem of hotspot: "you need a running JDK 
>> to build a new one".
>>
>> What are your recommendations to start a port? Is cross-compiling the 
>> only solution or are there other ways?
>> I think I saw once that an XSLT is started with an already installed 
>> JRE/JDK during the build process on my Linux machine. Is this the only 
>> reason why a JRE has to be installed?
>>
>> Any help would be greatly appreciated!
>>
>> Regards,
>>  Michael Neuweiler
>>