FreeBSD -pthread -lpq problem...

Hi,

I'm trying to compile a very simply program on FreeBSD that uses the C
libpq interface... when I do like this :

g++ -o test test.cpp -lpq

it works perfectly. But since I've made a Multi-thread version of this
program, I must now include the -pthread library. As soon as I try to
compile using this :

g++ -o test test.cpp -lpq -pthread

I receive errors :

/usr/lib/libc.so.4: WARNING! setkey(3) not present in the system!
/usr/lib/libc.so.4: warning: this program uses gets(), which is unsafe.
/usr/lib/libc.so.4: warning: mktemp() possibly used unsafely; consider
using mkstemp()
/usr/lib/libc.so.4: WARNING! des_setkey(3) not present in the system!
/usr/lib/libc.so.4: WARNING! encrypt(3) not present in the system!
/usr/lib/libc.so.4: warning: tmpnam() possibly used unsafely; consider
using mkstemp()
/usr/lib/libc.so.4: warning: this program uses f_prealloc(), which is
stupid.
/usr/lib/libc.so.4: WARNING! des_cipher(3) not present in the system!
/usr/lib/libc.so.4: warning: tempnam() possibly used unsafely; consider
using mkstemp()

The errors occurs only when I mix "-lpq" with "-pthread"... if I use
either one or the other, it works... Well I need to have
multi-threading capability and POSTGRES access at the same time... :(
Is this possible? How?

thanks for your hint

Fred