[Click] POSIX semaphores

[Eddie Kohler]

Bayani,

I assume you're using the element at userlevel?

According to Linux manual pages, "Programs using the POSIX semaphores 
API must be compiled with cc -lrt to link against the real-time library, 
librt."  You do this in Click by adding this to the end of your element:

ELEMENT_LIBS((-lrt))

make elemlist; make & you should be good to go
Eddie




Bayani Carbone wrote:
> Hi, is it possible to use POSIX semaphores in an element? I keep getting 
> this error when running a configuration:
>  undefined symbol: sem_unlink. Will I have to use System V semaphores 
> instead (shared memory works fine btw)?
> 
> Thanks,
> 
> Bayani Carbone
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