🚀 go-pugleaf

I tried posting this to comp.sys.powerpc, but it got lost in a sea of
Macintosh questions.

I'm using g++ 2.5.8 to try to port a largish C++ program to an IBM-41T
workstation running AIX 3.2.5, and I'm having trouble with the
linker.  Our .o files get compiled successfully, but when we try and
link, we get the following error:

Linking compiler
0706-781 ERROR: TOC overflow. TOC size: 647000  Max size: 65536
collect2: ld returned 12 exit status

This is a pretty large executable (240 .o files, producing an
executable of 10-12 MB on the SPARC, so it's possible (likely?) that
we're overflowing some default size for the TOC (by an order of
magnitude, it appears).  So, my questions are:

  a) Does anyone know how to increase this limit or work around it?

  b) Are there programming changes I can make that will cause things
     to not be put in the TOC?  How does the compiler/linker decide what
     needs to go in the TOC?

  c) Are there flags for gcc that will cause it to not put certain
     things in the TOC, similar to the -qdatalocal for IBM's xlc compiler?
     If so, this might reduce the size of the TOC (although it's unlikely
     to cut it by an order of magnitude, I suppose).

I found the following info on IBM's WWW site, describing differences
between the older version of the linker/binder that I'm using and a
newer version that we don't have:

------
      General Description of Major Binder Improvements

This binder has the following new features: 

TOC Overflow Resolved: The AIX Version 3.2 binder generates XCOFF
with a TOC size limit of 64K bytes. The AIX Version 4.1 binder has
removed this limitation by creating second level TOC information. A
slight performance tradeoff is expected for an executable with huge
TOC (>64K) due to one extra level of indirection for TOC entries
beyond 64K limit.
------

I've looked at the man page for both gcc and ld, but they weren't very
illuminating.

 Any advice would be appreciated (e-mail would be preferred).

Thanks,
  -- Jeff

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Jeffrey Dean (jdean@cs.washington.edu)                    Graduate Student
Dept. of Computer Science & Engineering           University of Washington
           http://www.cs.washington.edu/homes/jdean/index.html
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