According to https://github.com/SOLLVE/sollve_vv/issues/506 , LLVM has the following '-Wopenmp-target' warning.

RFC: Add a similar warning to warn_omp_declare_target_after_first_use ?
( https://github.com/llvm/llvm-project/commit/729e242a7972f4802f982a4b4dabb964aa299675 )


warning: declaration marked as declare target after first use, it may lead to incorrect results [-Wopenmp-target]
#pragma omp declare target link(a,b,c,i)


for code like:


int a[N], b[N], c[N];
int i = 0;

void update() {
  for (i = 0; i < N; i++) {
    a[i] += 1;
    b[i] += 2;
    c[i] += 3;
  }
}

#pragma omp declare target 
#pragma omp declare target link(a,b,c,i)  
#pragma omp declare target to(update)  
#pragma omp end declare target