我的C ++代码使用OpenMP指令,需要与GCC和Visual Studio 2019一起编译。OpenMP 3.1中引入了OpenMP最小/最大缩减运算符,但Visual Studio 2019 only supports OpenMP 2.0。
我希望我的代码在Visual Studio下恢复为串行循环,但我知道the preprocessor cannot represent a conditional pragma是这样的:
// invalid use of preprocessor:
#ifdef _MSC_VER
#define OMP_MIN(expr)
#else
#define OMP_MIN(expr) #pragma omp parallel for reduction(min:(expr))
#endif
double x = 10.0;
OMP_MIN(x)
for (int i = 0; i < array_size; i++) {
x = fmin(x, array[i]);
}
有没有办法做到这一点?