Bug 1309321 - problem with cilkplus pragma and preprocessor variable
problem with cilkplus pragma and preprocessor variable
Product: Fedora
Classification: Fedora
Component: gcc (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Jakub Jelinek
Fedora Extras Quality Assurance
: Reopened
Depends On:
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Reported: 2016-02-17 08:20 EST by ycollet
Modified: 2016-12-20 13:47 EST (History)
5 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-12-20 13:47:25 EST
Type: Bug
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Description ycollet 2016-02-17 08:20:45 EST
For cilkplus, the pragma cilk grainsize doesn't seems to accept preprocessor variables.

This bug has been reported on the gcc bugtracker: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69826
But the following code works for gcc 5.3.0, but not for gcc fedora 5.3.1.

Here is a small example:


#include <cilk/cilk.h>


void CoinAbcScatterUpdate(int number)
  int result = 0;

#pragma cilk grainsize=CILK_FOR_GRAINSIZE
  cilk_for(int j=0; j < number; j+=2) {

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.
Comment 1 ycollet 2016-02-17 09:50:38 EST
Fixed on https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69826
Comment 2 Jakub Jelinek 2016-03-05 02:49:45 EST
Fixed for f24+ so far, in gcc-6.0.0-0.13.fc24 and later.
Comment 3 Marek Polacek 2016-03-10 09:46:14 EST
Comment 4 Marek Polacek 2016-03-10 09:46:41 EST
Eh, didn't mean to close it really.
Comment 5 Fedora End Of Life 2016-11-24 10:36:51 EST
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Comment 6 Fedora End Of Life 2016-12-20 13:47:25 EST
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
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