MacOS X 10.3 build problems

Trying to build on MacOS X 10.3 reveals a compile issue with pthreads-

[ebv.skidmore.edu] % make
gcc -D_REENTRANT=1 -I. -Igw  -DDARWIN=1 -I/usr/include/libxml2 -o 
gw/bb_smscconn.o -c gw/bb_smscconn.c
gw/bb_smscconn.c:108: error: `PTHREAD_RWLOCK_INITIALIZER' undeclared 
here (not in a function)
gw/bb_smscconn.c:108: error: initializer element is not constant
gw/bb_smscconn.c:108: error: (near initialization for 
`smsc_list_lock.rwlock')
make: *** [gw/bb_smscconn.o] Error 1


indeed, pthread.h contains no PTHREAD_RWLOCK_INITIALIZER

which is interesting, since configure gives:

Checking for POSIX threads support ...
checking for working pthreads... yes
checking for pthread_spinlock support... no
checking for pthread_rwlock support... yes

bug?
-- 
flip phillips, phd
http://www.skidmore.edu/~flip