I am having trouble linking the pthread library.

I have -lpthread -lm as options for the GNU GCC compiler.

Build Log
------------------------------------------------------------
Compiling: main.c
Compiling: matrix.c
Compiling: newmalloc.c
Linking console executable: bin/Release/optimizer-4
obj/Release/main.o: In function `main':
main.c:(.text+0x132): undefined reference to `pthread_attr_setstacksize'
main.c:(.text+0x224): undefined reference to `pthread_create'
main.c:(.text+0x35b): undefined reference to `pthread_join'
collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 1 seconds)
3 errors
-------------------------------------------------------------
library search:
dlyon@dlyon-desktop2:~$ ls /usr/lib |grep pthread
libgpgme-pthread.so.11
libgpgme-pthread.so.11.7.0
libpthread.a
libpthread_nonshared.a
libpthread.so
dlyon@dlyon-desktop2:~$
-------------------------------------------------------------

Any ideas would be greatly appreciated! Thanks!

with out knowing what you are building we can not even guess
something is missing in some code ?? as to what ??
without seeing it ....

From man gcc (search for -llibrary in there)
Maybe that's the problem?