JDK7 System.loadLibrary on AIX

[Steve Poole]

hi Matthias -  I think adding that sort of support to OpenJDK makes sense.   We should not artificially restrict the form that a library name takes. If AIX can load it we should support it :-)

It also sounds like we need our own version of  solaris/classes/java/lang/ClassLoaderHelper.java 
Is that aix/classes/java/lang/ClassLoaderHelper.java ?  :-)


On 18 Sep 2012, at 09:43, Matthias Baesken <matthias.baesken at sap.com> wrote:

> Hello ,
> 
> I noticed that the IBM J9  is more flexible in the System.loadLibrary(libName) function;
> in the OpenJDK JDK or SAPJVM we had a fix prefix and suffix for libraries to be loaded via
> System.loadLibrary(libName).
> 
> E.g. for Linux the fix library name prefix was lib and the suffix .so , so for loading
> libtesting.so  one would call
> 
> System.loadLibrary("testing");
> 
> However IBM J9 would (at least) support also loading *.a and full-name for the library
> (maybe even more combinations ?) .
> E.g.
> 
> libtesting.a
> =>  System.loadLibrary("testing");    // works (at least with 6 and 7 )
> 
> libtesting.so
> =>  System.loadLibrary("testing");    // works (at least with 6 and 7 )
> 
> as well  System.loadLibrary("libtesting.so");  // works also with full name(at least with 6 and 7)
> 
> Should we add this functionality also for OpenJDK ?
> 
> Fortunately with the MacOS-X port in jdk7 they added recently the functionality to
> support more flexible naming for lib loading.
> See in jdk7 :
> 
> solaris/classes/java/lang/ClassLoaderHelper.java
> 
> (still empty implementation)
> or
> 
> macosx/classes/java/lang/ClassLoaderHelper.java
> (where they support 2 extensions at the moment)
> 
> 
> In the SAPJVM7 implementation I'll switch to use the solaris/classes/java/lang/ClassLoaderHelper.java
> for this, might be an option also for OpenJDK AIX port .
> 
> What do you think ?
> 
> 
> Thanks and best regards, Matthias
> 
> (btw. I am a colleague of Goetz and Volker working with them in the SAPJVM group)
>