how to link a posix function

[John Zhou]

Hi,

I wrote a program that used some POSIX function such as timer_create(),
timer_settime(), timer_delete(). But, it is report "undefined reference
to 'timer_create', etc.." when linking.

my question is: how to link with POSIX lib?

I know I must add "-lpthread" flag in Makefile when linking
pthread_create() function.

Best Regards,
John

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