Porting Hotspot to other platforms / OS'es

[Kelly O'Hair]

Excellent. I see it's only in the Linux makefiles, but I like the idea.
I'll file an RFE for the jdk to have such a thing, not sure when it will
get implemented.

-kto

Tom Rodriguez wrote:
> 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
>>>