Date: Wed, 21 Apr 1999 13:15:49 -0700 (PDT) From: lennox@cs.columbia.edu To: freebsd-gnats-submit@freebsd.org Subject: ports/11265: Shared libraries don't work when built with egcs port Message-ID: <19990421201549.064121589C@hub.freebsd.org>
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>Number: 11265
>Category: ports
>Synopsis: Shared libraries don't work when built with egcs port
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-ports
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Apr 21 13:20:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Jonathan Lennox
>Release: 3.1-STABLE
>Organization:
Columbia University
>Environment:
FreeBSD conrail.cs.columbia.edu 3.1-STABLE FreeBSD 3.1-STABLE #1: Wed Mar 3 23:45:27 EST 1999 lennox@conrail.cs.columbia.edu:/usr/cvsrc/RELENG_3/src/sys/compile/CONRAIL i386
>Description:
I pulled down the egcs-1.1.2 port in late March. When I build a shared
library with it, the resulting .so has undefined symbols in it that
aren't pulled in from anyplace. This isn't a problem when I link, but
when I try to run an executable linked with the .so, I get errors from
/usr/libexec/ld-elf.so of the form
/usr/libexec/ld-elf.so.1: ./libbaz.so: Undefined symbol "__deregister_frame_info"
This only seems to happen if both the shared library and the executable
use only C code; if anything uses C++ the missing symbols seem to get
pulled in from somewhere.
This symbol seems to be coming in from the two files
/usr/local/lib/gcc-lib/i386-portbld-freebsd3.1/egcs-2.91.66/crtbeginS.o
/usr/local/lib/gcc-lib/i386-portbld-freebsd3.1/egcs-2.91.66/crtendS.o
>How-To-Repeat:
bash-2.02$ cat bar.c
extern void baz(void);
int main()
{
baz();
exit(0);
}
bash-2.02$ cat baz.c
#include <stdio.h>
void baz(void)
{
printf("baz: hello world!\n");
}
bash-2.02$ egcc -Wall -c -fPIC baz.c
bash-2.02$ egcc -shared -Wl,-h -Wl,libbaz.so -o libbaz.so baz.o
bash-2.02$ egcc -Wall -c bar.c
bash-2.02$ egcc -o bar -L. bar.o -lbaz
bash-2.02$ LD_LIBRARY_PATH=. ./bar
/usr/libexec/ld-elf.so.1: ./libbaz.so: Undefined symbol "__deregister_frame_info"
bash-2.02$ egcc -v
Reading specs from /usr/local/lib/gcc-lib/i386-portbld-freebsd3.1/egcs-2.91.66/specs
gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)
(Note: this is a (very) simplified version of a part of the Mozilla
build system, which is where I noticed the problem.)
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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