From mboxrd@z Thu Jan  1 00:00:00 1970
From: law@redhat.com
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org
Subject: Re: objc/2902: collect2 doesn't find ctors/dtors in shared libraries under hpux10.20
Date: Wed, 13 Jun 2001 08:46:00 -0000
Message-id: <20010613154602.17534.qmail@sourceware.cygnus.com>
X-SW-Source: 2001-06/msg00565.html
List-Id: <gcc-prs.sourceware.org>

The following reply was made to PR objc/2902; it has been noted by GNATS.

From: law@redhat.com
To: dave.anglin@nrc.ca
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: objc/2902: collect2 doesn't find ctors/dtors in shared libraries 
 under hpux10.20
Date: Tue, 12 Jun 2001 18:52:50 -0700

   In message <20010522184444.25021.qmail@sourceware.cygnus.com>you write:
   > 
   > >Number:         2902
   > >Category:       objc
   > >Synopsis:       collect2 doesn't find ctors/dtors in shared libraries unde
   > r hpux10.20
   > >Confidential:   no
   > >Severity:       serious
   > >Priority:       medium
   > >Responsible:    unassigned
   > >State:          open
   > >Class:          sw-bug
   > >Submitter-Id:   net
   > >Arrival-Date:   Tue May 22 11:46:00 PDT 2001
   > >Closed-Date:
   > >Last-Modified:
   > >Originator:     Dave Anglin
   > >Release:        gcc version 3.0 20010518 (prerelease)
   > >Organization:
   > >Environment:
   > # ../../gcc/configure  --host=hppa1.1-hp-hpux10.20 --target=hppa1.1-hp-hpux
   > 10.20 --srcdir=../../gcc --with-gcc-version-trigger=/xxx/gnu/gcc-3.0/gcc/ve
   > rsion.c --with-gnu-as --enable-shared --enable-threads --enable-debug=no
   > >Description:
   > The symptom is a large number of failures in the testsuite with the followi
   > ng error:
   > 
   > Executing on host: /xxx/gnu/gcc-3.0/objdir/gcc/xgcc -B/xxx/gnu/gcc-3.0/objd
   > ir/gcc/ /xxx/gnu/gcc-3.0/gcc/testsuite/objc/execute/_cmd.m  -w  -O  -I/xxx/
   > gnu/gcc-3.0/gcc/testsuite/../../libobjc -L/xxx/gnu/gcc-3.0/objdir/hppa1.1-h
   > p-hpux10.20/libobjc/.libs  -lobjc -lm   -fPIC -o /xxx/gnu/gcc-3.0/objdir/gc
   > c/testsuite/_cmd.x
   >   (timeout = 300)
   > PASS: objc/execute/_cmd.m compilation,  -O
   > objc runtime: cannot find class Object
   > FAIL: objc/execute/_cmd.m execution,  -O
   > 
   > In debugging this, I found that the constructors to build the
   > classes Object and NXConstantString don't run when the application
   > is linked with a shared libobjc.  This is apparently because
   > collect2 can't determine that these constructors are needed.
   > Here is part of the output generated by collect2 with `-debug'
   > linking _cmd.x:
   > 
   > /usr/ccs/bin/ld -L/lib/pa1.1 -L/usr/lib/pa1.1 -z -u main -o /xxx/gnu/gcc-3.
   > 0/objdir/gcc/testsuite/_cmd.x /usr/ccs/lib/crt0.o -L/xxx/gnu/gcc-3.0/objdir
   > /hppa1.1-hp-hpux10.20/libobjc/.libs -L/xxx/gnu/gcc-3.0/objdir/gcc -L/usr/lo
   > cal/lib/gcc-lib/hppa1.1-hp-hpux10.20/3.0 -L/usr/ccs/bin -L/usr/ccs/lib -L/o
   > pt/langtools/lib -L/usr/local/lib/gcc-lib/hppa1.1-hp-hpux10.20/3.0/../../..
   >  /var/tmp/ccapeMug.o -lobjc -lm -lgcc -lc -lgcc
   >  /usr/local/lib/gcc-lib/hppa1.1-hp-hpux10.20/3.0/../../../../hppa1.1-hp-hpu
   > x10.20/bin/nm -n /xxx/gnu/gcc-3.0/objdir/gcc/testsuite/_cmd.x
   > 
   > nm output with constructors/destructors.
   >         000025e8 T _GLOBAL__I_main
   > 
   >  /usr/ccs/bin/chatr /xxx/gnu/gcc-3.0/objdir/gcc/testsuite/_cmd.x
   > 
   > ldd output with constructors/destructors.
   >                      dynamic   /xxx/gnu/gcc-3.0/objdir/hppa1.1-hp-hpux10.20
   > /libobjc/.libs/libobjc.sl.1
   >                      dynamic   /usr/lib/libc.1
   > 
   >  /usr/local/lib/gcc-lib/hppa1.1-hp-hpux10.20/3.0/../../../../hppa1.1-hp-hpu
   > x10.20/bin/nm -n /xxx/gnu/gcc-3.0/objdir/hppa1.1-hp-hpux10.20/libobjc/.libs
   > /libobjc.sl.1
   > 
   > nm output with constructors/destructors.
   >         00017aa0 T _GLOBAL__I___objc_linking
   >         00017ad0 T _GLOBAL__I___objc_linking
   >         00018210 T _GLOBAL__I_.._.._.._libobjc_NXConstStr.mSFndDa
   >         00018228 T _GLOBAL__I_.._.._.._libobjc_NXConstStr.mSFndDa
   >         0001a1e0 T _GLOBAL__I_.._.._.._libobjc_Object.mOXKa8a
   >         0001a1f8 T _GLOBAL__I_.._.._.._libobjc_Object.mOXKa8a
   >         0001b058 T _GLOBAL__I_.._.._.._libobjc_Protocol.mxvicuc
   >         0001b070 T _GLOBAL__I_.._.._.._libobjc_Protocol.mxvicuc
   > 
   >  /usr/local/lib/gcc-lib/hppa1.1-hp-hpux10.20/3.0/../../../../hppa1.1-hp-hpu
   > x10.2
   > 0/bin/nm -n /usr/lib/libc.1
   > 
   > nm output with constructors/destructors.
   > 
   > 1 constructor(s) found
   > 0 destructor(s)  found
   > 0 frame table(s) found
   > [Leaving /xxx/gnu/gcc-3.0/objdir/gcc/testsuite/_cmd.x]
   > >How-To-Repeat:
   > Configure with `--enable-shared'.
   > >Fix:
   > 
   > >Release-Note:
   > >Audit-Trail:
   > >Unformatted:
 I'm not sure which constructors you're claiming need to be fired and
 where they're defined.
 
 For a shared library all the ctors/dtors should be fired by the shared
 library's ctor/dtor.  ie, there should be a ctor for the library as a 
 whole which fires off all the ctors/dtors within the library.
 
 jeff