can't able to use usleep function in ARM DS-5

[Altera_Forum]

Hi, 

I am working with ARM DS-5 builder.I want to use Usleep function but it always display error like:  "undefined reference to `usleep'"  - I have already included unistd.h and when I click on usleep then it opens unistd.h. - I have also added path at program properties>C/C++ general>Paths and Symbols>Add.  but still when I build project it gives error of undefined reference.   Also I want ot measure time taken by particular C function but whrn I try to include windows.h then it display error.   I am working with windows7 64bit system on Cyclone V soc development kit.

[Altera_Forum]

#include "sys/unistd.h" 

or  # include <unistd.h>  ?

[Altera_Forum]

tried with following options: 

 # include "sys/unistd.h" # include "unistd.h" # include <sys/unistd.h> # include <unistd.h>  still not working..

[Altera_Forum]

--- Quote Start ---  tried with following options: # include "sys/unistd.h"# include "unistd.h"# include <sys/unistd.h># include <unistd.h>  still not working..  --- Quote End ---    Hello  Have you found a solution to this ? We are experiencing the same issue  Regards Mathieu