problem building octave

[Matt Funk]

Hi,

I am trying to build octave from the development sources.
However, the make process fails with the following:

...

g++  -I. -I.. -I../liboctave -I../src -I../libcruft/misc  -DHAVE_CONFIG_H 
-mieee-fp -Wall -W -Wshadow -Wold-style-cast -Wformat -g -O2 -rdynamic 
\
        -L..  -fPIC  -o octave \
        main.o  \
        -L../liboctave -L../libcruft -L../src -Wl,-rpath 
-Wl,/usr/local/lib/octave-3.1.55 
\
        -loctinterp -loctave  -lcruft   \
             \
            \
            \
        -lX11  -lreadline  -lncurses -ldl -lz -lm  
-L/usr/lib/gcc/i486-linux-gnu/4.3.3 
-L/usr/lib/gcc/i486-linux-gnu/4.3.3/../../../../lib -L/lib/../lib 
-L/usr/lib/../lib -L/usr/lib/gcc/i486-linux-gnu/4.3.3/../../.. -lz 
-lgfortranbegin -lgfortran -lm
../liboctave/liboctave.so: undefined reference to `pthread_mutexattr_destroy'
../liboctave/liboctave.so: undefined reference to `pthread_mutexattr_init'
../liboctave/liboctave.so: undefined reference to `pthread_mutexattr_settype'
collect2: ld returned 1 exit status
make[2]: *** [octave] Error 1
make[2]: Leaving directory `/usr/local/src/octave/octave/src'
make[1]: *** [src] Error 2
make[1]: Leaving directory `/usr/local/src/octave/octave'
make: *** [all] Error 2

...

Sorry if this is an obvious thing,

thanks
matt