Re: PATCH: Building libgcj with --disable-interpreter fails

[Andrew Haley <aph-gcc at littlepinkcloud dot COM>]

Rainer Orth writes:
 > I've recently tried to get libjava to build again on mips-sgi-irix6.5.
 > After working around PR libgcj/28190 with a fixincludes hack, I had to
 > fix two problems:
 > 
 > * I need a new mips-sgi-irix6* clause in configure.host to set the correct
 >   sysdeps_dir and disable the interpreter (which cannot work since only the
 >   O32 ABI has closure support in libffi):
 > 
 > Thu Jun 28 12:31:42 2007  Rainer Orth  <ro@TechFak.Uni-Bielefeld.DE>
 > 
 > 	* configure.host (mips-sgi-irix6*): Set sysdeps_dir.
 > 	Disable interpreter.
 > 	
 > Index: libjava/configure.host
 > ===================================================================
 > --- libjava/configure.host	(revision 126209)
 > +++ libjava/configure.host	(working copy)
 > @@ -254,6 +254,11 @@ EOF
 >  	sysdeps_dir=x86-64
 >  	DIVIDESPEC=-f%{m32:no-}%{!m32:%{!m64:no-}}%{m64:}use-divide-subroutine
 >  	;;
 > +  mips-sgi-irix6* )
 > +	sysdeps_dir=mips
 > +	# disable interpreter, no closure support for N32 and N64 ABIs
 > +	libgcj_interpreter=no
 > +	;;
 >    mips*-*-linux* )
 >    	sysdeps_dir=mips
 >    	can_unwind_signal=yes
 > 
 >   I'm currently running a bootstrap on the 4.2 branch, where this patch may
 >   be enough to get libgcj working again (as it did in 4.1).
 > 

Tom Tromey and I have looked at the patch, and we both hate the idea
of scattering yet more #ifdef INTERPRETER over the gcj source.
However, it's probably the best thing to do at the moment.  Please
commit this patch.

 > * The much bigger problem on mainline was that with libgcj_interpreter=no
 >   several files didn't compile any longer.  By trial and error I've
 >   determined the following patch which fixes the compile problem.
 >   Unfortunately, libgcj.so doesn't link any longer (what a surprise :-),
 >   and I don't know the code well enough to determine how to fix this.
 > 
 >   Since my IRIX hosts are quite slow, I tried to verify this patch on
 >   i386-pc-solaris2.10 (libgcj builds, but fails to link due to PR
 >   target/32462) and sparc-sun-solaris2.10 (libgcj builds, but fails to link
 >   due to many missing symbols) with --disable-interpreter.
 > 
 >   What's the best way to approach this?

I've added a comment to the Bug.

Andrew.