最近我开始了一个C++项目。问题是，当我尝试编译它时，会出现链接错误。今天我花了一整天时间试图调试它，但我没有在任何地方找到一个好的解决方案。如果有人能帮忙的话，那就太棒了。我正在使用Mac Sierra。
parsing/methylation.h
#ifndef EPIRL_METHYLATION_H
#define EPIRL_METHYLATION_H
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <sstream>
using namespace std;
namespace methylation {
struct MethLine {
string chr;
int coord;
char strand;
int methylated;
int un_methylated;
string context;
string tag;
};
string calculateMethylationByContext(
MethLine m_input[], int length,
int window_start, int window_end, int threshold);
void calculateMethylation(
const istream &methylation_stream,
const istream &coordinate_stream,
const ostream &output_stream
);
}
#endif //EPIRL_METHYLATION_H
parsing/methylation.cpp
#include "methylation.h"
namespace methylation {
string calculateMethylationByContext(
MethLine m_input[], int length,
int window_start, int window_end, int threshold) {
// rest of the code ...
}
}
main.cpp
#include <iostream>
#include <fstream>
#include "parsing/methylation.h"
using namespace std;
int main(int argc, char **argv) {
if (argc != 4) {
cout << "Invalid number of arguments..." << endl;
return 1;
}
char *methylation_file = argv[1];
char *coordinate_file = argv[2];
char *output_file = argv[3];
ifstream methylation_file_stream(methylation_file, ios::binary);
ifstream coordinate_file_stream(coordinate_file, ios::binary);
ofstream output_file_stream(output_file, ios::binary);
methylation::calculateMethylation(methylation_file_stream,
coordinate_file_stream, output_file_stream);
methylation_file_stream.close();
coordinate_file_stream.close();
output_file_stream.close();
return 0;
}
我使用CLion进行编码。当我尝试构建它时，我的cmake命令可以正常工作，但当我点击“make”时，我会收到以下错误：
Undefined symbols for architecture x86_64:
"methylation::calculateMethylation(std::__1::basic_istream<char, std::__1::char_traits<char> > const&, std::__1::basic_istream<char, std::__1::char_traits<char> > const&, std::__1::basic_ostream<char, std::__1::char_traits<char> > const&)", referenced from:
_main in main.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [src] Error 1
make[2]: *** [CMakeFiles/src.dir/all] Error 2
make[1]: *** [CMakeFiles/src.dir/rule] Error 2
make: *** [src] Error 2
我的 CMakeLists.txt 文件看起来像下面这样:
cmake_minimum_required(VERSION 3.6)
project(src)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES
parsing/methylation.cpp
parsing/methylation.h
main.cpp)
add_executable(src ${SOURCE_FILES})
当我运行cmake命令时，输出结果如下：
-- The C compiler identification is AppleClang 8.0.0.8000042
-- The CXX compiler identification is AppleClang 8.0.0.8000042
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/sztankatt/Documents/University/PartIII/Project/epiRL/src
calculateMethylation函数的定义，只有在parsing/methylation.h中对该函数的声明。 - TsyvarevcalculateMethylationByContext相关的内容，但你的错误与calculateMethylation相关。你在哪里定义了这个函数？ - nos