Date: Fri, 20 Oct 2000 13:58:40 -0400 From: Joe Diehl <jdiehl@genuity.net> To: freebsd-questions@freebsd.org Subject: linking oddness Message-ID: <20001020135840.P11549@genuity.net>
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I was wondering if someone can help me out here, seeing as I'm now rather lost.
I'm having problems with linking libraries that I install in /usr/local/lib.
For instance:
$ LD_LIBRARY_PATH=/usr/local/lib:/usr/lib:/usr/X11R6/lib:/lib
$ export LD_LIBRARY_PATH
$ gcc -o test test.o -ljpeg
/usr/libexec/elf/ld: cannot find -ljpeg
$ gcc -o test test.o -L/usr/local/lib -ljpeg
$ ldd test
test:
libjpeg.so.62 => /usr/local/lib/libjpeg.so.62 (0x28064000)
libc.so.4 => /usr/lib/libc.so.4 (0x28082000)
jdiehl@eros:~$ ls /usr/local/lib/libjpeg*
/usr/local/lib/libjpeg.a /usr/local/lib/libjpeg.so
/usr/local/lib/libjpeg.la /usr/local/lib/libjpeg.so.62
/usr/local/lib/libjpeg.lai /usr/local/lib/libjpeg.so.9
I'm running FreeBSD 4.1.1-RELEASE
I havn't fiddled with gcc/binutils at all:
jdiehl@eros:~$ gcc -v
Using builtin specs.
gcc version 2.95.2 19991024 (release)
jdiehl@eros:~$ ld -v
GNU ld version 2.10.0 (with BFD 2.10.0)
Because of these problems I've tried fiddling with /etc/ld{,-elf}.so.conf:
jdiehl@eros:~$ cat /etc/ld-elf.so.conf
/usr/lib
/usr/lib/compat
/usr/X11R6/lib
/usr/local/lib
jdiehl@eros:~$ cat /etc/ld.so.conf
/usr/lib/compat/aout
/usr/X11R6/lib/aout
/usr/local/lib/aout
/usr/lib/compath
/usr/X11R6/lib
/usr/local/lib
I did do an `ldconfig -aout; ldconfig -elf`
Note that this isn't limited to libjpeg:
jdiehl@eros:~$ gcc -o test test.o -ltiff
/usr/libexec/elf/ld: cannot find -ltiff
jdiehl@eros:~$ gcc -o test test.o -lXau
/usr/libexec/elf/ld: cannot find -lXau
jdiehl@eros:~$ gcc -o test test.o -lX11
/usr/libexec/elf/ld: cannot find -lX11
Now for some fun with truss:
$ truss ld -o test test.o -lc -ljpeg 2>&1 | grep libjpeg
open("/usr/lib/libjpeg.so",0,0666) ERR#2 'No such file or directory'
open("/usr/lib/libjpeg.a",0,0666) ERR#2 'No such file or directory'
$ truss ld -o test test.o -lc -ljpeg 2>&1 | grep libc\.
access("/usr/local/lib/libc.so.4",0) ERR#2 'No such file or directory'
access("/usr/lib/libc.so.4",0) = 0 (0x0)
open("/usr/lib/libc.so.4",0,027757774730) = 3 (0x3)
open("/usr/lib/libc.so",0,0666) = 5 (0x5)
Right so.. It'll look for libc in /usr/local/lib like my LD_LIBRARY_PATH asks;
however, it ignores my LD_LIBRARY_PATH for libjpeg? I notice that FreeBSD
uses ld.so.conf for a.out and ld-elf.so.conf for elf binaries, is there
something differant I need for elf linking besides LD_LIBRARY_PATH?
From the ld(1) manpage:
-Lsearchdir
This command adds path searchdir to the list of
paths that ld will search for archive libraries.
You may use this option any number of times.
The default set of paths searched (without being
specified with -L) depends on what emulation mode
ld is using, and in some cases also on how it was
configured. The paths can also be specified in a
link script with the SEARCH_DIR command.
Ok so I'm going to try this, though I'm not sure about exactly sure what format
is expected in SEARCH_DIR:
$ SEARCH_DIR="/usr/local/lib:/usr/lib:/usr/X11R6/lib"
$ export SEARCH_DIR
$ gcc -o test test.o -ljpeg
/usr/libexec/elf/ld: cannot find -ljpeg
$ SEARCH_DIR="-L/usr/local/lib"
$ export SEARCH_DIR
$ gcc -o test test.o -ljpeg
/usr/libexec/elf/ld: cannot find -ljpeg
Any thoughts?
I'm not on this list, so please cc: any replies to me.
Thanks :)
-- Joe Diehl (jdiehl@genuity.net)
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