>Number:         13486
>Category:       bin
>Synopsis:       ld doesn't complain on undefined symbols
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 16 13:43:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Larry Rosenman
>Release:        NetBSD 1.5.1
>Organization:
	LERCTR Consulting
>Environment:
	
System: NetBSD hp300 1.5.1 NetBSD 1.5.1 (HP300-LER) #2: Mon Jul 16 00:20:57 CDT 2001 ler@hp300:/usr/src/sys/arch/hp300/compile/HP300-LER hp300


>Description:
when linking a program with -ledit, and *NOT* including -lcurses, said program 
will not run, as _tputs is not defined.  Why doesn't the linker complain? 

The program actually links, but shouldn't. 
>How-To-Repeat:
link any program with -ledit, and try and execute it. 
 Larry Rosenman writes:

 > When it trys to run the following:
 > configure:7174: gcc -o conftest -O2 -pipe     -L/usr/local/lib conftest.c
 > -lz -lcrypt -lresolv -lcompat -lm -lutil -ledit  1>&5
 > configure: failed program was:
 > #line 7170 "configure"
 > #include "confdefs.h"
 > int main() { return 0; }
 > $
 >
 > that program dies:
 > $ cat conftest.c
 > #include "confdefs.h"
 > int main() { return 0; }
 >
 > $ /lib conftest.c -lz -lcrypt -lresolv -lcompat -lm -lutil -ledit
 >     <
 > $ ./conftest
 > /usr/libexec/ld.so: Undefined symbol "_tputs" in
 > conftest:/usr/lib/libedit.so.2.3

 Yes, I've seen that before.  The program links okay but does not execute
 because of an undefined symbol.  I think that's a linker bug.  Why would I
 need a linker if it doesn't make sure the executable has fully resolved
 symbols?  This can be observed at least with NetBSD -ledit and OpenBSD
 -lreadline.

 Here's how I would expect it to work:

 configure:3249: checking for readline
 configure:3271: gcc -o conftest -O2 -g     conftest.c -lreadline  1>&5
 /usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../libreadline.so: undefined reference to `tgetnum'
 [snip]
 collect2: ld returned 1 exit status
 configure: failed program was:
 #line 3260 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
     builtin and then its argument prototype would still apply.  */
     char readline();

     int main() {
     readline()
     ; return 0; }
     [snip]
     configure:3271: gcc -o conftest -O2 -g     conftest.c -lreadline -ltermcap  1>&5
     [success]


     This is from a configure of PostgreSQL 7.2devel, but I think it happens
     on 7.1.3 as well. 

     LER

>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted: