#include "cuda_runtime.h"
#include "device_launch_parameters.h"
#include <stdio.h>
#include "cube.cuh"

__global__ void cube_core(int *dev_a, int *dev_b){
	int tid=blockIdx.x;
	int tmp=*(dev_a+tid);
	*(dev_b+tid)=tmp*tmp*tmp;	
}


void cube(int result[], int n){
	int a[n];
	for(int i=0;i<n;i++){
		a[i]=i;	
	}	
	int *dev_a=NULL;
	int *dev_b=NULL;
	cudaMalloc((void**)&dev_a,n*sizeof(int));
	cudaMemset((void**)&dev_a,0,n*sizeof(int));
	cudaMalloc((void**)&dev_b,n*sizeof(int));
	cudaMemset((void**)&dev_b,0,n*sizeof(int));
	cudaMemcpy(dev_a,(void**)&a,n*sizeof(int),cudaMemcpyHostToDevice);
	cube_core<<<n,1>>>(dev_a,dev_b);
	cudaMemcpy((void **)&result[0],dev_b,n*sizeof(int),cudaMemcpyDeviceToHost);
}
 

#ifndef CUBE_H
	#define CUBE_H
	extern "C" void cube(int *result, int n);
#endif

project(CUBE)
cmake_minimum_required(VERSION 2.8)
find_package(CUDA REQUIRED)

file(GLOB_RECURSE CURRENT_HEADERS *.cuh)
file(GLOB CURRENT_SOURCES *.cu)

list(APPEND CUDA_NVCC_FLAGS "-std=c++11")

source_group("Include" FILES ${CURRENT_HEADERS})
source_group("Source" FILES ${CURRENT_SOURCES})

cuda_add_library(cube STATIC ${CURRENT_HEADERS} ${CURRENT_SOURCES})

#not used in this demo
TARGET_LINK_LIBRARIES(cube pthread)
TARGET_LINK_LIBRARIES(cube cufft)
TARGET_LINK_LIBRARIES(cube pcap)
 

#include<stdio.h>
#include"print.h"

void print(int *a, int n){
	printf("\tHola\n");
	for(int i=0;i<n;i++)
		printf("    %d\n",*(a+i));
	printf("\tAdios\n");
}

#ifndef PRINT_H
	#define PRINT_H
	extern "C" void print(int *a, int n);
#endif

project(PRINT)
cmake_minimum_required(VERSION 2.8)

file(GLOB_RECURSE CURRENT_HEADERS *.h)
file(GLOB CURRENT_SOURCES *.c)

set(CMAKE_C_COMPILER g++)
list(APPEND CMAKE_C_FLAGS "-lstdc++")

#source_group("Include" FILES ${CURRENT_HEADERS})
#source_group("Source" FILES ${CURRENT_SOURCES})

add_library(print STATIC ${CURRENT_HEADERS} ${CURRENT_SOURCES})
 

#include<stdio.h>
extern "C" void cube(int *a, int n);
extern "C" void print(int *a, int n);

int main(){
	int N=10;
	int a[10];
	cube(a,N);
	print(&a[0],N);
}

project(PRO)
cmake_minimum_required(VERSION 2.8)
add_subdirectory(cuda ./cuda/bin)
add_subdirectory(src ./src/bin)
set(EXTRA_LIBS ${EXTRA_LIBS} cube print)
SET(CMAKE_C_COMPILER g++)
list(APPEND CMAKE_C_FLAGS "-lstdc++")

add_executable(pro main.c)
target_link_libraries(pro ${EXTRA_LIBS})

cd build
cmake ..
make
./pro

sudo cp  /usr/local/cuda-6.5/lib/libcufft.so.6.5.53 	/usr/lib/arm-linux-gnueabihf/libcufft.so.6.5.53
sudo ln –s /usr/lib/arm-linux-gnueabihf/libcufft.so.6.5.53 /usr/lib/arm-linux-gnueabihf/libcufft.so.6.5
sudo ln –s /usr/lib/arm-linux-gnueabihf/libcufft.so.6.5  /usr/lib/arm-linux-gnueabihf/libcufft.so

//usr/lib/arm-linux-gnueabihf/libstdc++.so.6:error adding symbols: DSO missing from command line

CMakeLists.txt新增：set(CMAKE_C_COMPILER g++)# gcc使用c++庫。

注意：直接用gcc進行連結時，-lstdc++放在最後，因為gcc是按從右到左的順序查詢依賴庫的。
3./home/ubuntu/Documents/Active/active_uart/cuda/active.cu(1535): error:namespace "std" has no member "to_string"
/cuda/CMakeLists.txt 新增：list(APPEND CUDA_NVCC_FLAGS “-std=c++11”)