control: tags -1 moreinfo control: tags -1 unreproducible Hi, the code you posted fails on unstable/experimental with gcc-4.9, gcc-5 and gcc-6
gcc-6 test.c test.c:1:12: error: size of array '__acc_cta' is negative extern int __acc_cta[1-2*!((1l << (8*4 -1)) < 0)]; gcc-5 test.c test.c:1:12: error: size of array '__acc_cta' is negative extern int __acc_cta[1-2*!((1l << (8*4 -1)) < 0)]; gcc-4.9 test.c test.c:1:12: error: size of array '__acc_cta' is negative extern int __acc_cta[1-2*!((1l << (8*4 -1)) < 0)]; not sure what is wrong, but seems not a bug in gcc. I that expressions evaluates in -1 with int and it compiles with "extern int __acc_cta[(unsigned int)1-2*!((1l << (8*4 -1)) < 0)];" the bug seems to be somewhere else. cheers, Gianfranco
