I see that the dev tools cilkview and cilkscreen have been updated in late 2015 (build 4421) -- the web pages state that they support the gcc cilk branch -- does this imply that they don't support the latest gcc compilers -- aka gcc 5.3. The gcc 5.3 compiles and runs the cilk code like the traditional fib.cpp test code. But when run under the latest cilkscreen and cilkview, these programs complain about lack of cilk sir code, see below:
-bash-4.2$ cilkview ./fib
Cilkview: Generating scalability data
Cilkview Scalability Analyzer V2.0.0, Build 4421
Fibonacci number #39 is 63245986.
Calculated in 13735.060 seconds using 64 workers.
Error: No Cilk code found in program
any ideas? Is there some extra directive that I need in the code or in the compile line?
Your thought is correct unfortunately.
Cilk tools do not work with the latest (mainline) GCC compilers, and the only GCC version that works with the tools is "cilkplus-4_8-branch".