有没有人知道如何在gcc5.2.0中使用Cilk plus正确编译以下代码?使用gcc -fcilkplus *或g ++,我总是会遇到错误。
#include <cilk/cilk.h>
#include <assert.h>
int fib(int n) {
if (n < 2)
return n;
int a = cilk_spawn fib(n-1);
int b = fib(n-2);
cilk_sync;
return a + b;
}
int main() {
int result = fib(30);
assert(result == 832040);
return 0;
}
结果:
Undefined symbols for architecture x86_64:
"___cilkrts_enter_frame_1", referenced from:
fib(int) in ccY1qrGL.o
"___cilkrts_enter_frame_fast_1", referenced from:
__cilk_spn_0 in ccY1qrGL.o
"___cilkrts_leave_frame", referenced from:
fib(int) in ccY1qrGL.o
__cilk_spn_0 in ccY1qrGL.o
"___cilkrts_rethrow", referenced from:
fib(int) in ccY1qrGL.o
"___cilkrts_save_fp_ctrl_state", referenced from:
fib(int) in ccY1qrGL.o
"___cilkrts_sync", referenced from:
fib(int) in ccY1qrGL.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
关于此在线的话题很少。感谢
答案 0 :(得分:1)
GCC配置为在用户给出-fcilkplus时默认将-lcilkrts添加到其链接器命令,但如果存在任何特定于平台的配置,则可以覆盖此默认行为。我认为这是在OS X上发生的,但我认为需要修复它。无论如何,除了如上所述添加-lcilkrts之外,似乎没有短期解决方案。