BUG #5062: 8.4.1 compile fails on debian can't find libdl

The following bug has been logged online:

Bug reference: 5062
Logged by: philip wright
Email address: zphw(at)de1(dot)uga(dot)duke(dot)edu
PostgreSQL version: 8.4.1
Operating system: Linux Debian Debian 4.1.2-25
Description: 8.4.1 compile fails on debian can't find libdl
Details:

./configure --prefix=/opt/pgsql8.4.1 -enable-integer-datetimes
--enable-thread-safety --with-openssl --with-perl
--with-libs=/opt/zlib/lib:/opt/openssl/lib
--with-includes=/opt/zlib/include:/opt/openssl/include

root(at)de2 /pkgs/postgresql-8.4.1 > cd /opt
root(at)de2 /opt > ls -ltra
total 712
drwxr-xr-x 22 root root 4096 2009-07-16 08:42 ..
drwxrwxr-x 5 zphw zphw 4096 2009-07-16 09:08 zlib-1.2.3
lrwxrwxrwx 1 zphw zphw 10 2009-07-16 09:09 zlib -> zlib-1.2.3
drwxrwxr-x 6 zphw zphw 4096 2009-07-16 09:20 openssl-0.9.8k
lrwxrwxrwx 1 zphw zphw 14 2009-07-16 09:24 openssl -> openssl-0.9.8k
drwxrwxr-x 7 zphw zphw 4096 2009-07-16 09:33 openssh-5.1p1
lrwxrwxrwx 1 zphw zphw 13 2009-07-16 09:33 openssh -> openssh-5.1p1
drwxrwxr-x 6 zphw zphw 4096 2009-08-31 11:25 perl
-rw-rw-r-- 1 zphw zphw 692448 2009-08-31 11:42 perl_install_log.txt
drwxr-xr-x 10 root root 4096 2009-09-17 09:34 jdk1.6.0_16
lrwxrwxrwx 1 root root 11 2009-09-17 09:34 java -> jdk1.6.0_16
drwxr-xr-x 7 zphw root 4096 2009-09-17 09:34 .
root(at)de2 /opt >

root(at)de2 /opt > uname -a
Linux XXXXX 2.6.26-2-686 #1 SMP Sun Jun 21 04:57:38 UTC 2009 i686 GNU/Linux

root(at)de2 /opt > cat /proc/version
Linux version 2.6.26-2-686 (Debian 2.6.26-17) (dannf(at)debian(dot)org) (gcc
version 4.1.3 20080704 (prerelease) (Debian 4.1.2-25)) #1 SMP Sun Jun 21
04:57:38 UTC 2009

Error at end of make

gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels -fno-strict-aliasing -fwrapv
pg_ctl.o -L../../../src/port -lpgport -L../../../src/interfaces/libpq -lpq
-L../../../src/port -L/opt/zlib/lib -L/opt/openssl/lib -Wl,--as-needed
-Wl,-rpath,'/opt/pgsql8.4.1/lib' -lpgport -lssl -lcrypto -lz -lreadline
-lcrypt -ldl -lm -o pg_ctl
../../../src/interfaces/libpq/libpq.so: undefined reference to `dlsym'
../../../src/interfaces/libpq/libpq.so: undefined reference to `dlerror'
../../../src/interfaces/libpq/libpq.so: undefined reference to `dlopen'
../../../src/interfaces/libpq/libpq.so: undefined reference to `dlclose'
collect2: ld returned 1 exit status
make[3]: *** [pg_ctl] Error 1
make[3]: Leaving directory `/pkgs/postgresql-8.4.1/src/bin/pg_ctl'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/pkgs/postgresql-8.4.1/src/bin'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/pkgs/postgresql-8.4.1/src'
make: *** [all] Error 2

root(at)de2 /opt > locate libdl
/lib/libdl-2.7.so
/lib/libdl.so.2
/lib/i686/cmov/libdl-2.7.so
/lib/i686/cmov/libdl.so.2
/usr/lib/libdl.a
/usr/lib/libdl.so
/usr/lib/xen/libdl.a