OpenMP library specification

i am new to open mp and i tried an sample program from the official site

#include <omp.h>
#include <stdio.h>
int main() {
#pragma omp parallel
printf("Hello from thread %d, nthreads %d\n", omp_get_thread_num(), 开发者_C百科omp_get_num_threads());
}

and i have set the library in the eclipse as libgomp in project Properties->GCC c++ linker-

but the program say /usr/bin/ld: cannot find -llibgomp can i know where i am wrong

Try linking with gomp instead of libgomp: library names must be passed to the linker without the lib prefix, which it adds automatically. Hence the error, it is trying to find liblibgomp. Don't forget the compiler flag -fopenmp, otherwise the OpenMP pragmas will simply be ignored.

Add gomp to GCC C++ Linker->Libraries. Then add −fopenmp to the Miscellaneous flags for GCC C++ Compiler, GCC C Compiler, and GCC C++ Linker