Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!apple!motcsd!hpda!hpcuhb!hpcllla!hpclisp!hpclscu!shankar
From: shankar@hpclscu.HP.COM (Shankar Unni)
Newsgroups: comp.lang.c++
Subject: Re: problems building cfront 2.0
Message-ID: <1000035@hpclscu.HP.COM>
Date: 11 Nov 89 00:12:26 GMT
References: <995@mit-amt.MEDIA.MIT.EDU>
Organization: Hewlett-Packard Calif. Language Lab
Lines: 32

>  exit( 0 );    // <- this line makes all the difference

This is because of a peculiar implementation of the C startup code. /lib/crt0.o
on the 800's jumps to a location called _start in /lib/libc.a, which is what
calls "main()", and if main returns, it calls "exit()". The problem, as you
can imagine, is that if exit is not explicitly referenced in the user code,
it is not picked up from /usr/lib/libC.a (where the C++ exit resides), but
instead, it is picked up from /lib/libc.a.

The solution is to apply the following patch:

*** CC  Fri Jun 30 14:15:24 1989
--- CC.new      Fri Nov 10 16:11:05 1989
***************
*** 73,78 ****
--- 73,81 ----
  APASS=0
  defmem=D deflist=

+ # explicitly undefine exit for hp9000 s8xx
+ test -x /bin/hp9000s800 && hp9000s800 && Z='-Wl,-u,exit'
+
  rm -fr $TEMPDIR
  mkdir $TEMPDIR
  E=$?



-----
Shankar Unni                                   E-Mail: 
Hewlett-Packard California Language Lab.     Internet: shankar@hpda.hp.com
Phone : (408) 447-5797                           UUCP: ...!hplabs!hpda!shankar