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make コマンドを使用してホスト コードをコンパイルしようとしているとき。 それは私にこのエラーを与えました:
`/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status make: *** [bin/host] Error 1 `
私のmain.cpp
#include<assert.h> #include<math.h> #include<cstring> //#include "AOCLUtils/aocl_utils.h" //#include "stdafx.h" #include<CL/cl.h> #include<time.h> //#include<sys/time.h> #include<CL/cl_ext.h> #include<algorithm> #include<iomanip> #include<iostream> #include <fstream> #include <stdio.h> #include <stdlib.h> #include <array> #include <string.h> #include <CL/opencl.h> using namespace std; using namespace aocl_utils; void cleanup() {} bool read_data_set(string filename, array<array<int, 20>, 5430>& array_X_dataset, array<int, 5430>& array_Y_dataset) { int field0, field1, field2, field3, field4, field5, field6, field7, field8, field9, field10, field11, field12, field13, field14, field15, field16, field17, field18, field19, field20, field21; char comma; int line = 0; ifstream myfile(filename); if (myfile.is_open()) { while (myfile >> field0 >> comma >> field1 >> comma >> field2 >> comma >> field3 >> comma >> field4 >> comma >> field5 >> comma >> field6 >> comma >> field7 >> comma >> field8 >> comma >> field9 >> comma >> field10 >> comma >> field11 >> comma >> field12 >> comma >> field13 >> comma >> field14 >> comma >> field15 >> comma >> field16 >> comma >> field17 >> comma >> field18 >> comma >> field19 >> comma >> field20 >> comma >> field21) { array<int, 20> inner_array{ field1, field2, field3, field4, field5, field6, field7, field8, field9, field10, field11, field12, field13, field14, field15, field16, field17, field18, field19, field20 }; array_X_dataset[line] = inner_array; array_Y_dataset[line] = field21; line++; } myfile.close(); } else { cout << "Unable to open file"; return true; } return false; } //functoin to randomly mix the dataset. void mix_dataset(array<array<int, 20>, 5430>& array_X_dataset, array<int, 5430>& array_Y_dataset) { size_t len = array_X_dataset.size(); for (size_t i = 0; i < len; ++i) { size_t swap_index = rand() % len; // Random number between 0 and len-1. if (i == swap_index) continue; array<int, 20> data_point{ }; data_point = array_X_dataset[i]; array_X_dataset[i] = array_X_dataset[swap_index]; array_X_dataset[swap_index] = data_point; int Y = array_Y_dataset[i]; array_Y_dataset[i] = array_Y_dataset[swap_index]; array_Y_dataset[swap_index] = Y; } } //functoin to divide the dataset using 5-fold cross validatoin. void split_dataset(int fold, int **array_X_set, int *array_Y_set,int **X_train, int *Y_train, int **X_test, int *Y_test) { int rows = 5430; int cols = 20; int division = 1086; switch (fold) { case 1: for (int i = 0; i < rows; ++i) { for (int j = 0; j < cols; ++j) { if (i < division) { X_test[i][j] = array_X_set[i][j]; Y_test[i] = array_Y_set[i]; } else { X_train[i - division][j] = array_X_set[i][j]; Y_train[i - division] = array_Y_set[i]; } } } break; case 2: // apply loop unrolling (#pragma unroll <N>) for (int i = 0; i < rows; ++i) { for (int j = 0; j < cols; ++j) { if (i >= 1086 && i <= 2171) { X_test[i - 1086][j] = array_X_set[i][j]; Y_test[i - 1086] = array_Y_set[i]; } else { if (i < 1086) { X_train[i][j] = array_X_set[i][j]; Y_train[i] = array_Y_set[i]; } else { X_train[i - (2171 - 1086 + 1)][j] = array_X_set[i][j]; Y_train[i - (2171 - 1086 + 1)] = array_Y_set[i]; } } } } break; case 3: // apply loop unrolling (#pragma unroll <N>) for (int i = 0; i < rows; ++i) { for (int j = 0; j < cols; ++j) { if (i >= 2172 && i <= 3257) { X_test[i - 2172][j] = array_X_set[i][j]; Y_test[i - 2172] = array_Y_set[i]; } else { if (i < 2172) { X_train[i][j] = array_X_set[i][j]; Y_train[i] = array_Y_set[i]; } else { X_train[i - (3257 - 2172 + 1)][j] = array_X_set[i][j]; Y_train[i - (3257 - 2172 + 1)] = array_Y_set[i]; } } } } break; case 4: // apply loop unrolling (#pragma unroll <N>) for (int i = 0; i < rows; ++i) { for (int j = 0; j < cols; ++j) { if (i >= 3258 && i <= 4343) { X_test[i - 3258][j] = array_X_set[i][j]; Y_test[i - 3258] = array_Y_set[i]; } else { if (i < 3258) { X_train[i][j] = array_X_set[i][j]; Y_train[i] = array_Y_set[i]; } else { X_train[i - (4343 - 3258 + 1)][j] = array_X_set[i][j]; Y_train[i - (4343 - 3258 + 1)] = array_Y_set[i]; } } } } break; case 5: // apply loop unrolling (#pragma unroll <N>) for (int i = 0; i < rows; ++i) { for (int j = 0; j < cols; ++j) { if (i >= 4344 && i <= 5429) { X_test[i - 4344][j] = array_X_set[i][j]; Y_test[i - 4344] = array_Y_set[i]; } else { if (i < 4344) { X_train[i][j] = array_X_set[i][j]; Y_train[i] = array_Y_set[i]; } else { X_train[i - (5429 - 4344 + 1)][j] = array_X_set[i][j]; Y_train[i - (5429 - 4344 + 1)] = array_Y_set[i]; } } } } break; } } int main() { // Read dataset from file. string filename = ".//dataset.csv"; static array<array<int, 20>, 5430> array_X_dataset{}; static array<int, 5430> array_Y_dataset{}; bool error = read_data_set(filename, array_X_dataset, array_Y_dataset); if (error) { cout << "Exiting with error while reading dataset file " << filename << endl; exit(-1); } //printout whole dataset & size of feature dataset: /* for (int i = 0; i < 5430; i++) { printf ( " %d ", i); for (int j = 0; j < 20 ;j++) printf(" % d ", array_X_dataset[i][j]); printf(" %d ", array_Y_dataset[i]); printf("\n"); }*/ // Randomly mix the dataset and printout. // Initialize the seed. srand(3); mix_dataset(array_X_dataset, array_Y_dataset); //int array_X_set[5430][20]; // int array_Y_set[5430]; int* array_Y_set = new int[5430]; int** array_X_set = new int* [5430]; for (int i = 0; i < 5430; i++) { array_X_set[i] = new int[20]; } // copy contents of the mixed std::arrays into plain arrays for (int i = 0; i < 5430; i++) { for (int j = 0; j < 20; j++) array_X_set[i][j] = array_X_dataset[i][j]; array_Y_set[i] = array_Y_dataset[i]; } /* printf("printout the whole dataset after random mixing:\n"); for (int i = 0; i < 5430; i++) { printf ( " %d ", i); for (int j = 0; j < 20 ;j++) printf(" %d ", array_X_set[i + j * 5430]); printf(" %d ", array_Y_set[i]); printf("\n"); }*/ int* Y_train = new int[4344]; int* Y_test = new int[1086]; int** X_train = new int* [4344]; for (int i = 0; i < 4344; i++) { X_train[i] = new int[20]; } int** X_test = new int* [1086]; for (int i = 0; i < 1086; i++) { X_test[i] = new int[20]; } //split the dataset using 5 - fold cross validation int fold = 1; // cout << "inseret fold num " << endl; //cin >> fold; split_dataset(fold, array_X_set, array_Y_set, X_train, Y_train, X_test, Y_test); // int x; // cin >> x; // printout the train dataset /* for (int i = 0; i < 4344; i++) { printf(" %d ", i); for (int j = 0; j < 20; j++) printf(" %d ", X_train[i][j]); printf(" %d ", Y_train[i]); printf("\n"); }*/ // printout the test dataset /* for (int i = 0; i < 1086; i++) { printf(" %d ", i); for (int j = 0; j < 20; j++) printf(" %d ", X_test[i][j]); printf(" %d ", Y_test[i]); printf("\n"); }*/ // deallocate memory using the delete operator /*for (int i = 0; i < 5430; i++) { delete[] array_X_set[i]; } delete[] array_X_set; for (int i = 0; i < 4344; i++) { delete[] X_train[i]; } delete[] X_test; for (int i = 0; i < 1086; i++) { delete[] X_test[i]; } delete[] X_train; delete[] array_Y_set; delete[] Y_train; delete[] Y_test;*/ //--------------------------host code--------------------------------------------------------------// // Search for an openCL platform cl_platform_id fpga_paltform = NULL; if (clGetPlatformIDs(1, &fpga_paltform, NULL) != CL_SUCCESS) { printf("Unable to get platform_id\n"); return 1; } // Search for an openCL device cl_device_id fpga_device = NULL; if (clGetDeviceIDs(fpga_paltform, CL_DEVICE_TYPE_ALL, 1, &fpga_device, NULL) != CL_SUCCESS) { printf("Unable to get device_id\n"); return 1; } // Create a context. cl_context context = clCreateContext(NULL, 1, &fpga_device, NULL, NULL, NULL); // Create a command queue using the context and device. cl_command_queue queue = clCreateCommandQueue(context, fpga_device, 0, NULL); // Read FPGA binary size_t length = 0x10000000; unsigned char* binary = (unsigned char*)malloc(length); FILE* fp = fopen("kernel.aocx", "rb"); fread(binary, length, 1, fp); fclose(fp); // Create program cl_program program = clCreateProgramWithBinary(context, 1, &fpga_device, &length, (const unsigned char**)&binary, NULL, NULL); // Create kernel. cl_kernel kernel = clCreateKernel(program, "KNN_classifier", NULL); // Create memory Object :: create buffers for the input and ouput // inputs: X_train, Y_train, data_point, k // outputs: host_output int host_output[4344];// back int k = 3; int data_point[20] = {}; for (int i = 0; i < 4344; ++i) { for (int j = 0; j < 20; ++j) { data_point[j] = array_X_set[i][j]; } } cl_mem dev_X_train = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(int) * 4344 * 20, X_train, NULL); cl_mem dev_Y_train = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(int) * 4344, Y_train, NULL); cl_mem dev_data_point = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(int) * 20, data_point, NULL); cl_mem dev_output = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(int) * 4344, host_output, NULL); // Trnsfer input data from host to device clEnqueueWriteBuffer(queue, dev_X_train, CL_TRUE, 0, sizeof(int) * 4344 * 20, X_train, 0, NULL, NULL); clEnqueueWriteBuffer(queue, dev_Y_train, CL_TRUE, 0, sizeof(int) * 4344, Y_train, 0, NULL, NULL); clEnqueueWriteBuffer(queue, dev_data_point, CL_TRUE, 0, sizeof(int) * 20, data_point, 0, NULL, NULL); // Set kernel arguments clSetKernelArg(kernel, 0, sizeof(cl_mem), &dev_X_train); clSetKernelArg(kernel, 1, sizeof(cl_mem), &dev_Y_train); clSetKernelArg(kernel, 2, sizeof(cl_mem), &dev_data_point); clSetKernelArg(kernel, 3, sizeof(int), &k); clSetKernelArg(kernel, 4, sizeof(cl_mem), &dev_output); // Execute kernel cl_event kernel_event; clEnqueueTask(queue, kernel, 0, NULL, &kernel_event); clWaitForEvents(1, &kernel_event); clReleaseEvent(kernel_event); // Read data from FPGA clEnqueueReadBuffer(queue, dev_output, CL_TRUE, 0, sizeof(int) * 4344, host_output, 0, NULL, NULL); // Print output for (int i = 0; i < 4344; i++) printf("class_label[%d] = %d\n", i, host_output[i]); clFlush(queue); clFinish(queue); // Free memory clReleaseMemObject(dev_X_train); clReleaseMemObject(dev_Y_train); clReleaseMemObject(dev_data_point); clReleaseMemObject(dev_output); clReleaseKernel(kernel); clReleaseProgram(program); clReleaseCommandQueue(queue); clReleaseContext(context); // free(X_train); //free(Y_train); // deallocate memory using the delete operator for (int i = 0; i < 5430; i++) { delete[] array_X_set[i]; } delete[] array_X_set; for (int i = 0; i < 4344; i++) { delete[] X_train[i]; } delete[] X_test; for (int i = 0; i < 1086; i++) { delete[] X_test[i]; } delete[] X_train; delete[] array_Y_set; delete[] Y_train; delete[] Y_test; free(data_point); free(host_output); return 0; }
私が試したこと：
コンパイラがメイン関数を認識しない理由がわかりません
解決策 1
これはリンカ エラーであり、 main コードを実行するために必要な機能がありません。 main は C ベースのアプリケーションの出発点であり、それなしでは実行できません。
おそらく、正しいファイルをコンパイルしていないか、このファイル出力を他のファイルとリンクする必要があります。 main 関数。 を確認してください makefile フォルダーのどこかで、すべてが一緒にコンパイルされるかどうかを確認します。
これを修正するお手伝いはできません。システムにアクセスできません!
解決策 3
#include<stdio.h> #include<stdlib.h> struct node { int data; struct node*next; }; void linklisttraversal(struct node*head) { struct node*temp=head; while(temp!=NULL) { printf("%d",temp->data); temp=temp->next; } void main() { struct node*n1; struct node*n2; struct node*n3; n1=(struct node*)malloc(sizeof(struct node)); n2=(struct node*)malloc(sizeof(struct node)); n3=(struct node*)malloc(sizeof(struct node)); n1->data=20; n1->next=n2; n2->data=30; n2->next=n3; n3->data=40; n3->next=NULL; linklisttraversal(head); } }
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