尊龙凯时人生就是搏

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Ò»¡¢×°ÖÃCMake

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sudo apt-get install cmake

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¶þ¡¢½¨ÉèCMakeLists.txt

ÔÚÏîÄ¿¸ùĿ¼Ï½¨ÉèÒ»¸öÃûΪCMakeLists.txtµÄÎļþ¡£Õâ¸öÎļþÊÇCMakeµÄÉèÖÃÎļþ£¬ÓÃÓÚ¸æËßCMakeÔõÑù¹¹½¨ÏîÄ¿¡£ÒÔÏÂÊÇÒ»¸ö¼òÆÓµÄCMakeLists.txtµÄʾÀý£º

cmake_minimum_required(VERSION 3.10)

project(ParallelApp)

find_package(OpenMP REQUIRED)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fopenmp")

set(SOURCE_FILES main.cpp)

add_executable(ParallelApp ${SOURCE_FILES})

target_link_libraries(ParallelApp PRIVATE OpenMP::OpenMP_CXX)

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ÉÏÊöʾÀýÖУ¬ÎÒÃÇÊ×ÏÈÖ¸¶¨ÁËCMakeµÄ×îµÍ°æ±¾ºÅΪ3.10¡£È»ºó£¬Í¨¹ýfind_packageÏÂÁî²éÕÒOpenMP¿â¡£OpenMPÊÇÒ»ÖÖ²¢ÐÐÅÌËãµÄ±ê×¼£¬¿ÉÒÔÓÃÓÚÔÚ¶àºË´¦ÀíÆ÷ÉϾÙÐв¢Ðл¯²Ù×÷¡£½ÓÏÂÀ´£¬ÎÒÃÇÉèÖÃÁ˱àÒë±ê¼Ç£¨CMAKE_CXX_FLAGS£©ÎªC++11°æ±¾ºÍOpenMPÖ§³Ö¡£È»ºó£¬Ö¸¶¨ÁËÏîÄ¿Ô´Îļþ£¨SOURCE_FILES£©µÄÃû³ÆΪmain.cpp¡£×îºó£¬Ê¹ÓÃadd_executableÏÂÁÉèÒ»¸öÃûΪParallelAppµÄ¿ÉÖ´ÐÐÎļþ£¬²¢Ê¹ÓÃtarget_link_librariesÏÂÁOpenMP¿âÁ´½Óµ½¿ÉÖ´ÐÐÎļþÖС£

Èý¡¢±àÒëºÍÔËÐÐÏîÄ¿

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mkdir build
cd build
cmake ..
make

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ÉÏÊöÏÂÁÔÚbuildĿ¼ÏÂÌìÉú¿ÉÖ´ÐÐÎļþParallelApp¡£ÒªÔËÐÐÏîÄ¿£¬¿ÉÒÔÖ´ÐÐÒÔÏÂÏÂÁ

./ParallelApp

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ËÄ¡¢´úÂëʾÀý

ÏÂÃæÊÇÒ»¸ö¼òÆÓµÄʹÓÃOpenMP²¢ÐÐÅÌËãµÄC++´úÂëʾÀý£º

#include <iostream>
#include <omp.h>

int main() {
    int num_threads = omp_get_max_threads();
    int sum = 0;

    #pragma omp parallel for reduction(+:sum)
    for(int i = 0; i < 100; i++) {
        sum += i;
    }

    std::cout << "Sum: " << sum << std::endl;

    return 0;
}

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ÔÚÕâ¸öʾÀýÖУ¬ÎÒÃÇʹÓÃÁËOpenMPµÄ²¢Ðл¯Ö¸Áî#pragma omp parallel for£¬ÒÔ¼°reductionÖ¸ÁîÀ´ÇóÈ¡iµÄ×ܺÍ¡£ÔÚ±àÒëºÍÔËÐÐÕâ¸öʾÀý֮ǰ£¬ÐèҪȷ±£ÏµÍ³ÉÏÒѾ­×°ÖÃÁËOpenMP¿â¡£

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