C++ Code::Blocks + MinGW 配置 OpenMP 和例子

http://forums.codeblocks.org/index.php?topic=13104.0

 

配置OpenMP:

1. "Settings -> Compiler and debugger setting-> Compiler settings-> Other options", 加入"-fopenmp”

 

2. "Settings -> Compiler and debugger setting-> Linker settings" -> Link libraries -> Add

找到MigGW中的libgomp.dll.a

在/mingw/lib/gcc/mingw32/4.6.2(version number)/libgomp.dll.a

 

运行例子：

1.

#include <omp.h>
#include <stdio.h>
int main() {
#pragma omp parallel
printf("Hello from thread %d, nthreads %d\n", omp_get_thread_num(), omp_get_num_threads());
}

 

2.

见http://blog.youkuaiyun.com/housisong/article/details/1485166，可以对比单核和多核的运行速度差别；