[ExM Users] stc unsupported class error

[Tim Armstrong]

It should default to the java in PATH - is it not doing that for you?

Currently it only uses two things to resolve java: the -j flag, and "which
java" - other environment variables, etc, shouldn't affect it.

- Tim


On Mon, Apr 28, 2014 at 11:04 AM, Ketan Maheshwari <ketan at mcs.anl.gov>wrote:

> Hi Tim,
>
> stc -V does not seem to show which java it is running with:
>
> $ stc -V user.swift
> stc: Optimization level 2
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> exm/stc/ui/Main : Unsupported major.minor version 51.0
>
> The -j option works but in my case, the stc call is part of a generic
> script and this will involve detecting java on systems to run with. Is it
> somehow possible to tell stc to use the same java in current env at the
> time of build and run.
>
> Thanks,
> Ketan
>
>
> On Mon, Apr 28, 2014 at 10:56 AM, Tim Armstrong <tim.g.armstrong at gmail.com
> > wrote:
>
>>   I haven't seen that one before.  It sounds like it's being run with an
>> older version of Java than it was compiled with.
>>
>> Java class version 51.0 corresponds to java 7 (
>> http://en.wikipedia.org/wiki/Java_class_file#General_layout), so it
>> seems like it must be getting run with an older version.
>>
>>  You could try the -V switch to STC to see which java it's being run
>> with, and then -j /path/to/jvm/bin/java to force a different java version.
>>
>>  - Tim
>>
>>
>> On Mon, Apr 28, 2014 at 10:33 AM, Ketan Maheshwari <ketan at mcs.anl.gov>wrote:
>>
>>> Hi,
>>>
>>>  While running stc on MCS workstations, I get:
>>>
>>>  ./genleaf vanilla mockdock.c mockdock.h user.swift
>>>  Exception in thread "main" java.lang.UnsupportedClassVersionError:
>>> exm/stc/ui/Main : Unsupported major.minor version 51.0
>>>
>>>  Somehow the java versions at build and runtime are getting mixed up.
>>>
>>>  This is how I build:
>>>
>>>  export JAVA_HOME=/homes/ketan/jdk1.7.0_07
>>>  ant install -Ddist.dir=/home/ketan/exm-install/stc
>>>
>>>  I have the same java in my env:
>>>
>>>  $ which java
>>> /homes/ketan/jdk1.7.0_07/bin/java
>>>
>>>
>>>  Any suggestions to fix this?
>>>
>>>  Thanks,
>>> Ketan
>>>
>>> _______________________________________________
>>> ExM-user mailing list
>>> ExM-user at lists.mcs.anl.gov
>>> https://lists.mcs.anl.gov/mailman/listinfo/exm-user
>>>
>>>
>>
>
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