Re: Performance gcj & mysql

[Marco Trudel <marco at mtsystems dot ch>]

ezer wrote:
> I run gcj -static-libgcj --main=MysqlConnect -o mysqlconnect
> MysqlConnect.java mysql-5.0.8.o
>
> i get:
> /usr/bin/ld: cannot find -lgcj
> collect2: ld returned 1 exit status
>
> The file libgcj.spec :

Right, now I remember. This one has already been discussed long ago. I 
even had a local patch to fix it for testing purposes...
I think my conclusion back then was that libgcj.spec was/is flawed for 
using "-static-libgcj". But the discussion was - if I remember right - 
somewhat strange and Andrew didn't agree with that. One of the 
discussions about libgcj.spec can be found here: 
http://gcc.gnu.org/ml/java/2007-03/msg00074.html
But I think it's not really the discussion I have in mind.

Anyway, you need to adjust that file. Just try temporarily removing 
"-lgcj"...


Hope that helps
Marco


> %rename startfile startfileorig
> *startfile:  %(startfileorig)
>
> %rename lib liborig
> *lib: %{static-libgcj:-non_shared} %{s-bc-abi:-lgcj_bc;:-lgcj}
> %{static-libgcj:-call_shared} -lm   -lpthread -lrt -lz   -ldl %(libgcc) 
> %(liborig)
>
> *jc1: -fhash-synchronization -fno-use-divide-subroutine  -fuse-boehm-gc
> -fnon-call-exceptions   -fkeep-inline-functions
>
>
> I cant find any lgcj file, i found libgcj, even changing the names i get the
> same error. Sghould i define a path or add any other file ?
>
>
>
> Andrew Haley wrote:
> > Marco Trudel wrote:
> > > Andrew Haley wrote:
> > > > > 2) ./mysqlconnect stays dependant of the gcj libraries? When i
> > > > > uninstall gcj
> > > > > the executable complains about libgcj. Is there any way to have it
> > > > > totally
> > > > > independent, for example i want to copy the executable and
> > > > > mysql-5.0.8.o
> > > > > library without worring if have have gcj installed on that machine.
> > > > This is very difficult.  The -static-libgcj option might help,
> > > > but I wouldn't guarantee it.  For more details see:
> > > > http://gcc.gnu.org/wiki/Statically%20linking%20libgcj
> > > Actually it works quite well as long as you know some little details.
> > Well, no.  It can work in some circumstances, and in others it doesn't
> > work at all.
> >
> > Andrew.