Programming

Hi,
I know very little about C and Unix. I have written a program to use threads. The program needs to get some values from a very large database.
I wrote a simple program and compiled but got the following errors.....

cc mythread.c -lthread


"/usr/include/pthread.h", line 120: syntax error before or at: *
"/usr/include/pthread.h", line 121: function cannot return function or array
"/usr/include/pthread.h", line 121: syntax error before or at: void
"/usr/include/pthread.h", line 121: warning: syntax error: empty declaration
"/usr/include/pthread.h", line 123: syntax error before or at: void
"/usr/include/pthread.h", line 124: warning: function prototype parameters must
have types
"/usr/include/pthread.h", line 125: syntax error before or at: *
"/usr/include/pthread.h", line 126: syntax error before or at: *
"/usr/include/pthread.h", line 127: syntax error before or at: *
"/usr/include/pthread.h", line 128: syntax error before or at: *
"/usr/include/pthread.h", line 129: syntax error before or at: *
"/usr/include/pthread.h", line 131: syntax error before or at: *
"/usr/include/pthread.h", line 133: syntax error before or at: *
"/usr/include/pthread.h", line 134: syntax error before or at: *
"/usr/include/pthread.h", line 135: syntax error before or at: *
"/usr/include/pthread.h", line 136: syntax error before or at: *
"/usr/include/pthread.h", line 137: syntax error before or at: *
"/usr/include/pthread.h", line 137: function cannot return function or array
"/usr/include/pthread.h", line 137: syntax error before or at: )
"/usr/include/pthread.h", line 137: warning: syntax error: empty declaration
"/usr/include/pthread.h", line 138: cannot recover from previous errors

I am using DYNIX/ptx, v 4.5

YOur help will be highly appreciated

thanks
reddyb