LD_LIBRARY_PATH not honored on Debian unstable

Hi,

I'm trying to run 'make check' on a 64bit Debian unstable. That aborts 
after 60 seconds due to not being able to connect to the postmaster.

I figured that there's nothing wrong with the postmaster, rather psql 
can't start up, because it gets linked against an older libpq.so.5. It 
looks like for some reason, it doesn't respect the LD_LIBRARY_PATH env 
variable, see ldd output:

markus@argodan:/home/markus/projects/pgsql/sources/current/pgsql/src/test/regress# 
LD_LIBRARY_PATH=/home/markus/projects/pgsql/sources/current/pgsql/src/test/regress/./tmp_check/install//usr/lib 
ldd -r -v tmp_check/install/usr/bin/psqllinux-vdso.so.1 =>  (0x00007fffc2bfe000)libpq.so.5 => /usr/lib/libpq.so.5
(0x00002ac8e81ba000)libz.so.1=> /usr/lib/libz.so.1 (0x00002ac8e83db000)libreadline.so.5 => /lib/libreadline.so.5
(0x00002ac8e8606000)libcrypt.so.1=> /lib/libcrypt.so.1 (0x00002ac8e8846000)libdl.so.2 => /lib/libdl.so.2
(0x00002ac8e8a7e000)libm.so.6=> /lib/libm.so.6 (0x00002ac8e8c82000)libc.so.6 => /lib/libc.so.6
(0x00002ac8e8f04000)libssl.so.0.9.8=> /usr/lib/libssl.so.0.9.8 (0x00002ac8e9262000)libcrypto.so.0.9.8 =>
/usr/lib/libcrypto.so.0.9.8(0x00002ac8e94ae000)libkrb5.so.3 => /usr/lib/libkrb5.so.3
(0x00002ac8e983c000)libcom_err.so.2=> /lib/libcom_err.so.2 (0x00002ac8e9ad7000)libpthread.so.0 => /lib/libpthread.so.0
(0x00002ac8e9cd9000)libncurses.so.5=> /usr/lib/libncurses.so.5 (0x00002ac8e9ef5000)/lib64/ld-linux-x86-64.so.2
(0x00002ac8e7f9c000)libk5crypto.so.3=> /usr/lib/libk5crypto.so.3 (0x00002ac8ea132000)libkrb5support.so.0 =>
/usr/lib/libkrb5support.so.0(0x00002ac8ea357000)libkeyutils.so.1 => /lib/libkeyutils.so.1
(0x00002ac8ea55f000)libresolv.so.2=> /lib/libresolv.so.2 (0x00002ac8ea761000)
 
undefined symbol: pg_valid_server_encoding_id 
(tmp_check/install/usr/bin/psql)
undefined symbol: PQconnectionNeedsPassword    (tmp_check/install/usr/bin/psql)


Giving it an additional LD_PRELOAD for the newish libpq.5.1 helps:

markus@argodan:/home/markus/projects/pgsql/sources/current/pgsql/src/test/regress# 
LD_PRELOAD=/home/markus/projects/pgsql/sources/current/pgsql/src/test/regress/tmp_check/install/usr/lib/libpq.so.5.1 
LD_LIBRARY_PATH=/home/markus/projects/pgsql/sources/current/pgsql/src/test/regress/./tmp_check/install//usr/lib 
ldd -r -v tmp_check/install/usr/bin/psqllinux-vdso.so.1 =>
(0x00007fffe97fe000)/home/markus/projects/pgsql/sources/current/pgsql/src/test/regress/tmp_check/install/usr/lib/libpq.so.5.1

(0x00002b69c1547000)libz.so.1 => /usr/lib/libz.so.1 (0x00002b69c1765000)libreadline.so.5 => /lib/libreadline.so.5
(0x00002b69c1990000)libcrypt.so.1=> /lib/libcrypt.so.1 (0x00002b69c1bd0000)libdl.so.2 => /lib/libdl.so.2
(0x00002b69c1e08000)libm.so.6=> /lib/libm.so.6 (0x00002b69c200c000)libc.so.6 => /lib/libc.so.6
(0x00002b69c228e000)libncurses.so.5=> /usr/lib/libncurses.so.5 (0x00002b69c25ec000)/lib64/ld-linux-x86-64.so.2
(0x00002b69c1329000)


Somebody have an idea on what's wrong here? Thanks.

Regards

Markus