samba - Aug 2007 - libpthread warning while compiling samba 3.0 on Suse Linux (SLES 10)

I compile Samba for the first time on LINUX (SLES 10) and
have a weird libpthread warning message.
I dug the list to find some explanations about the way I have
to handle this problem, without success.

Below are the 'configure' parameters and the part of config.log about 
libpthread.

Is there a way to not link libpthread to avoid this
performance degradation ?

What must I do with this warning ?
> ./configure --with-smbwrapper --with-quotas --with-msdfs --with-acl-support
--with-winbind --with-smbmount --with-cifsmount --with-aio-support
> configure:66245: checking if libpthread is linked
> configure:66268: gcc -o conftest -O -D_SAMBA_BUILD_=3 
-D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE   -Wl,-rpath,/usr/lib
conftest.c -lcrypt -lresolv -lresolv -lnsl  -ldl  -lrt >&5
> configure:66274: $? = 0
> configure:66281: result: yes
> configure:66284: WARNING: using libpthreads - this may degrade performance
> configure:66504: result: Using libraries:
> configure:66506: result:     LIBS = -lcrypt -lresolv -lresolv -lnsl -ldl
-lrt
> configure:66520: result:     AUTH_LIBS = -lcrypt

Thank you for your help.

Pierre