I have two questions -
1. on AIX 5.1 running postgresql7.4, the production server compiled
without --enable-thread-safety, can I installed slony-I without
recompiling the installed postgresql on the production server?

2. I tried to reconfigure postgresql7.4 on AIX 5.1 with
--enable-thread-safety, I got error -
checking for pthread.h... yes
configure: error:
Cannot enable threads on your platform.
Please report your platform threading info to the PostgreSQL mailing
lists
so it can be added to the next release.  Report all compile flags, link
flags,
functions, or libraries required for threading support.
See the comment at the top of src/port/thread.c for more information.

I tried different options without luck, my option is -
./configure --prefix=/syntec/stiadmin/pgsql74 --with-pgport=5555
--with-libraries=/usr/local/lib --with-includes=/usr/local/include
--enable-thread-safety CC=cc_r CFLAGS="-lpthreads"

Thanks for your help.

johnl