https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69826
Bug ID: 69826
Summary: problem with cilkplus pragma and preprocessor variable
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ycollette.nospam at free dot fr
Target Milestone: ---
For cilkplus, the pragma cilk grainsize doesn't seems to accept preprocessor
variables.
Here is a small example:
test.cpp
#include <cilk/cilk.h>
#define CILK_FOR_GRAINSIZE 128
void CoinAbcScatterUpdate(int number)
{
int result = 0;
#pragma cilk grainsize=CILK_FOR_GRAINSIZE
cilk_for(int j=0; j < number; j+=2) {
result+=j;
}
}
The compilation:
$ g++ -c -fcilkplus test.cpp -o test.o
The Error message:
test.cpp: Dans la fonction ‘void CoinAbcScatterUpdate(int)’:
test.cpp:9:24: erreur: ‘CILK_FOR_GRAINSIZE’ was not declared in this scope
#pragma cilk grainsize=CILK_FOR_GRAINSIZE
^
test.cpp:9:9: erreur: invalid grainsize for _Cilk_for
#pragma cilk grainsize=CILK_FOR_GRAINSIZE
^
If I replace #define CILK_FOR_GRAINSIZE 128 by int CILK_FOR_GRAINSIZE = 128;
then the compilation went fine.
