topic _Cilk_spawn is undefined in Software Archive

_Cilk_spawn is undefined

Nikos_L_ — Sun, 08 Nov 2015 11:20:14 GMT

Hello, I have installed Visual Studio 2013 and Intel Parallel Studio and when i write a cilk plus program (fibonacci to be accurate) it compiles it just fine, but it doesn't recognize the commands cilk_spawn and cilk_sync (if i move the cusror to these commands it says "_Cilk_spawn is undefined","_Cilk_sync is undefined" ). Also when i run the fibonacci program the serial version executes in almost the same amount of time as the parallel version (weird ah?).

I researched on the internet for this problem but no-one seems to give a solution.

Any help would be appreciated

I forgot to say that I have

Nikos_L_ — Sun, 08 Nov 2015 11:29:48 GMT

I forgot to say that I have changed the compiler to Intel c++

Hi,

Hansang_B_Intel — Mon, 09 Nov 2015 15:04:46 GMT

Hi,

I don't see any problems with Visual Studio 2013 + Intel Parallel Studio XE 2016.

Could you please check if you are setting the Intel compiler correctly (e.g. solution property -> Intel Compiler -> Use Intel C++)? Also, don't forget to include "cilk/cilk.h" to use "cilk_spawn/cilk_sync/cilk_for" keywords. When properly configured, the editor should highlight the Cilk keywords.

As for the performance of Fibonacci, you can find some inforamtion in other topics:

https://software.intel.com/en-us/forums/intel-cilk-plus/topic/559858

https://software.intel.com/en-us/forums/intel-cilk-plus/topic/559859

Yes the compiler is properly

Nikos_L_ — Mon, 09 Nov 2015 17:49:41 GMT

Yes the compiler is properly configured and I have included the cilk libraries. Here is a screenshot http://prntscr.com/90v6j3 .

I noticed that if i declare the fib function like this "cilk int fib (int n){...}" it highlights the Cilk keywords but still gives errors http://prntscr.com/90v9nl .

Thanks for the help

Hi,

Hansang_B_Intel — Mon, 09 Nov 2015 19:36:16 GMT

Hi,

Your first screenshot tells that the code was compiled correctly, and only the error highlighting tool is complaining about the Cilk things. I think the analysis tool (for highlighting) works independently of Intel compilers and doesn't understand the Cilk Plus extension to C/C++. The second example is not a valid program, so the compiler failed to compile the code.