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I'm trying to create an echo server on spartan 3 A with MicroBlaze using ethernet interface, but when i compile the project i got an undefined reference error. I am using lwip 1.3.0.

I think that i am missing a library but I can't get which one?

The error is:

microblaze_0\libsrc\lwip130_v3_01_a\src/contrib/ports/xilinx/sys_arch.c:347 >undefined reference to `sem_post'

Tony Hinkle
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Sergiu Beniamin Malutan
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  • If you note the link to the possible duplicate question the source code there has the reference `#include `. `[sem_post](http://pubs.opengroup.org/onlinepubs/9699919799/ "sem_post") is a call that requires that reference. (the call is iin libc, the declaration for the function is found through the include file). –  Jun 11 '15 at 23:41
  • i included already and linked the library lib c, my problems was that in xilkernel configuration there was an option to activate threads and semaphore and now it is working, thanks – Sergiu Beniamin Malutan Jun 12 '15 at 22:49

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