ld -A ... on SunOs 4.0?

[Jan Wielemaker]

Under SunOs 3.4 I wrote  a  foreign  language  interface  to  my  Prolog
compiler.  This was done by calling the loader with the following flags:

    ld -N -A <prolog executable> -T <address> -e <entry> <files> -lc

Where <entry> was the name  of  an  initialisation  function  called  by
Prolog  to  register  the  new predicates with Prolog.  This worked fine
until we got SunOs 4.0 ...

Problems

Prolog itself has been linked  dynamically.   Any  attempt  to  link  it
statically  was  refused  by  the  loader, complaining I redefined _end,
_edata and _etext.  I most certainly did not define  these  symbols  and
even  the most trivial C-program I tried to compile with cc -Bstatic ...
gave this complaint.

If (with the dynamically linked Prolog) try  to  invoke  the  loader  as
above  it  complains with ``__DYNAMIC not found''.  If I delete the ``-e
entry'' options I don't get this message.  So  I  now  scan  the  symbol
table  myself  to  find  the entry point.  Now linking goes fine, but as
soon as the initialisation  function  calls  one  of  Prologs  interface
functions a crash follows.  Presumably I have to call ``ld.so'' somehow,
but  SUN  is  very  vague about how to do this (a small example would be
most helpfull).

Finally the manual of ld(1) says that using the -A option the  resulting
a.out  file  will contain both the symbols of the original executable as
those from the new linked material.  This used to be the case with SunOs
3.4, but seems not to be the case  any  more.   `nm'  only  reports  new
symbols.   I  want  a  file  with  ALL symbols both for debugging as for
subsequent runs of ld.

Questions

    - Would a static linked Prolog solve the problem and how do I get
      a static linked version?
    - How should I use ``ld.so'' in this case? I've looked at link(5)
      and the shared library chapter of the SUN manual. This is too
      vague to me.
    - How do I get a file holding ALL symbols? Is it a bug of ld?

	Any hint is welcome!   Jan Wielemaker