我安装了Armadillo线性代数库,在Linux模拟操作系统上进行了一些矩阵操作。但是,我的坏处是,我无法使用makefile编译和执行我的c ++代码:
CC=g++
all: file_1.o main.o
$(CC) -o EXCUTE_ALL file_1.o main.o
main.o: main.cpp file_1.h
$(CC) -c main.cpp
file_1.o: file_1.h
$(CC) -c file_1.cpp
#running
run :
./EXCUTE_ALL
.PHONY: clean
clean:
rm -f *.o
rm -f EXCUTE_ALL
file_1.cpp是:
#include <iostream>
#include <stdio.h>
#include "armadillo"
#include "file_1.h"
using namespace std;
using namespace arma;
mat myclass::product(mat my_matrix)
{
mat product=my_matrix * my_matrix;
return product;
}
file_1.h是:
#include <iostream>
#include <stdio.h>
#include "armadillo"
using namespace std;
using namespace arma;
class myclass{
public:
mat product(mat matrixAA);
};
Main.cpp是:
#include <iostream>
#include <stdio.h>
#include "armadillo"
#include "file_1.h"
using namespace std;
using namespace arma;
int main()
{
myclass matfile;
mat BB;
mat AA=randu<mat>(500,500);
BB=matfile.product(AA);
return 0;
}
并收到以下错误:
file_1.o: In function `void arma::blas::gemv<double>(char const*, int const*, int const*, double const*, double const*, int const*, double const*, int const*, double const*, double*, int const*)':
file_1.cpp:(.text._ZN4arma4blas4gemvIdEEvPKcPKiS5_PKT_S8_S5_S8_S5_S8_PS6_S5_[void arma::blas::gemv<double>(char const*, int const*, int const*, double const*, double const*, int const*, double const*, int const*, double const*, double*, int const*)]+0x53): undefined reference to `wrapper_dgemv_'
file_1.o: In function `void arma::blas::gemm<double>(char const*, char const*, int const*, int const*, int const*, double const*, double const*, int const*, double const*, int const*, double const*, double*, int const*)':
file_1.cpp:(.text._ZN4arma4blas4gemmIdEEvPKcS3_PKiS5_S5_PKT_S8_S5_S8_S5_S8_PS6_S5_[void arma::blas::gemm<double>(char const*, char const*, int const*, int const*, int const*, double const*, double const*, int const*, double const*, int const*, double const*, double*, int const*)]+0x61): undefined reference to `wrapper_dgemm_'
collect2: ld returned 1 exit status
make: *** [all] Error 1
但是,这适用于makefile,使用以下命令:
`g++ -o obj Main.cpp file_1.cpp -l armadillo`.
如果我在makefile中遗漏了某些内容,那么任何人都可以帮助我。谢谢..
答案 0 :(得分:1)
您的Makefile没有告诉链接器将其与Armadillo库链接。一种解决它的方法,虽然我不确定它是否是“良好实践”的方法是将-l armadillo添加到“all:”行的末尾。它可能无法找到“EXCUTE_ALL”,因为我没有看到任何创建它,我看到它在清理后被删除。