pthreads/libtool puzzle

[walt <wa1ter@xxxxxxxxxxxxx>]

While updating the libgnome port I get this error:
make  all-am
/bin/sh /usr/local/bin/libtool15 --mode=link cc -O -pipe -L/usr/local/lib -o
gnome-open  gnome-open.o libgnome-2.la -lpopt
cc -O -pipe -o .libs/gnome-open gnome-open.o  -L/usr/local/lib
. /.libs/libgnome-2.so -L/usr/X11R6/lib /usr/X11R6/lib/libgnomevfs-2.so
-lgobject-2.0 -lxml2 -lz -lssl -lcrypto -lbonobo-2 -lbonobo-activation -lgconf-2
-lORBit-2 -lgmodule-2.0 -lgthread-2.0 -lglib-2.0 -liconv/usr/local/lib/libesd.so
-lgnugetopt -laudiofile -lm -lpopt -Wl,--rpath -Wl,/usr/X11R6/lib -Wl,--rpath
-Wl,/usr/local/lib
/usr/X11R6/lib/libgnomevfs-2.so: undefined reference to `pthread_create'

If I understand correctly (doubtful) there should be a -pthread in that
list of flags, so that libc_r gets pulled in?

I'm not certain, but I think the list of libraries comes from libgnome-2.la:

# Libraries that this one depends upon.
dependency_libs=' -L/usr/local/lib -L/usr/X11R6/lib
/usr/X11R6/lib/libgnomevfs-2.la -lgobject-2.0 -lxml2 -lz -lssl -lcrypto
-lbonobo-2 -
lbonobo-activation -lgconf-2 -lORBit-2 -lgmodule-2.0 -lgthread-2.0 -lglib-2.0
-liconv /usr/local/lib/libesd.la -lgnugetopt -laudiofile -
lm -lpopt' (sorry about the line-wrap)

So -- I'm wondering if the -pthread flag should be listed in the .la file
along with the other dependencies?  (I notice that libtool just got updated
this morning, and anyway I'm just naturally suspicious of libtool ;o)