compile semaphore and share memory is not working!

[Pavel Tsekov]

Anh Nguyen wrote:
> 
> Hello everyone. I have problem compiling semaphore and
> share memory in cygwin. I did download and install the
> icp packages. However, when i compile my programs i
> get these errors:
> 
> /cygdrive/c/WINDOWS/TEMP/ccfnoqO7.o(.text+0x33a):server2.c:
> undefined reference to `shmat'
> /cygdrive/c/WINDOWS/TEMP/ccfnoqO7.o(.text+0x1884):server2.c:
> undefined reference to `shmget'
> collect2: ld returned 1 exit status
> 
> Anyone has any ideas what is wrong with these. Note, i
> did include
> #include <sys/ipc.h>
> #include <sys/sem.h>
> #include <sys/shm.h>
> #include <sys/msg.h>
> in my program.

do you specify the library containing the IPC functions on the
gcc command line ?

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