Compiling problems

When I try to compile I get the following errors:

/usr/local/lib/libccgnu2.a(thread.o)(.text+0x30): In function
`ost::Thread::enterCancel()':
/home/scpsms/usuarios/juanmms/commoncpp2-1.3.22/src/thread.cpp:185:
referencia a `pthread_testcancel' sin definir
/usr/local/lib/libccgnu2.a(thread.o)(.text+0x55): In function
`ost::Thread::exitCancel(ost::Thread::Cancel)':
/home/scpsms/usuarios/juanmms/commoncpp2-1.3.22/src/thread.cpp:202:
referencia a `pthread_testcancel' sin definir
/usr/local/lib/libccgnu2.a(thread.o)(.text+0xb5): In function
`ost::Thread::suspend()':
/home/scpsms/usuarios/juanmms/commoncpp2-1.3.22/src/thread.cpp:1117:
referencia a `pthread_kill' sin definir
/usr/local/lib/libccgnu2.a(thread.o)(.text+0x10a): In function
`ost::Thread::resume()':

( ................ )

And when I try to add the library libpthread, I get the following mistakes:

/usr/lib/libpthread.a(pthread.o)(.text+0x313): In function
`__pthread_initialize_manager':
: referencia a `_res' sin definir
/usr/lib/libpthread.a(pthread.o)(.text+0xb03): In function
`__pthread_reset_main_thread':
: referencia a `_errno' sin definir
/usr/lib/libpthread.a(pthread.o)(.text+0xb13): In function
`__pthread_reset_main_thread':
: referencia a `_h_errno' sin definir

( ......................)

Someone know how can I solve the problem?

Thank you.

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