Thread: Compiling on Cygwin, but not on Dev-C++... Why?

Code:

/*
Obtencao do conjunto potencia de um vector de inteiros.
Autor: Miguel Martins <[email protected]> <[email protected]>
*/
#include <iostream>
#include <vector>
#include <cmath>
using namespace std;

vector< vector<int> > getPowerSet(vector<int> s);
string toBinaryString(int i);
string reverseString(string s);
vector<int> mergeVectorAndString(vector<int> v,string s);

int main() {
    vector<int> v;
    v.push_back(1);
    v.push_back(2);
    v.push_back(3);
    vector< vector<int> > resultado = getPowerSet(v);
    for (unsigned int i=0;i<resultado.size();i++) {
        cout << "{";
        for (unsigned int j=0;j<resultado[i].size();j++)
            cout << resultado[i][j] << " ";
        cout << "}" << endl;
    }
    
    string end;
    cin >> end;
    return 0;
}

vector< vector<int> > getPowerSet(vector<int> v) {
    vector< vector<int> > power_set;
    int number_of_elements = (int)pow((double)2,(double)v.size());
    for (int i=0;i<number_of_elements;i++) {
        string s = toBinaryString(i);
        power_set.push_back(mergeVectorAndString(v,s));
    }
    return power_set;
}

string toBinaryString(int i) {   
    string ret;
    while(1) { 
        int foo = i % 2;
        ret += (foo + '0');
        i /= 2;
        if (i==0) break;
    }
    ret = reverseString(ret);
    return ret;
}

string reverseString(string s) {
    int n = s.size();
    for (int i=0;i<n/2;i++) {
        char foo = s[i];
        s[i] = s[n-i-1];
        s[n-i-1] = foo;
    }
    return s; 
}

vector<int> mergeVectorAndString(vector<int> v,string s) {
    vector<int> ret;
    string s1;
    for (unsigned int i=0;i<(v.size()-s.size());i++) s1 += "0";
    s1 += s;
    for (unsigned int i=0;i<s1.size();i++) if (s1[i]=='1') ret.push_back(v[i]);
    return ret;
}

Apparently, this compiles correctly on Cygwin, using g++, but not on Dev-C++.
Dev-C++ gives me the following error:

[Linker error] undefined reference to `__cpu_features_init'

Can you guys successfully compile this under Dev-C++? Do you have to make any changes in order to accomplish that? Please let me know.

I'm sorry, I didn't quite understand what you mean... "Compiling code in the same place"? As in... "Compiling under the same directory"? If so, it doesn't matter, because even if I move my source file into an empty directory, it won't compile with Dev-C++.

Unbelievable! Now Dev-C++ won't even compile the "Hello World" program! What is the meaning of this? Where did that stupid linker error come from? Oh well, I guess I'm off to reinstall Dev-C++. Thanks for trying to help.

My best guess is that both compilers trying to link to the same libraries.
You propably got the library path mixed up.
Kurt

I took manutd's advice, but it was still giving me that error... You're not gonna believe what caused it... I had another installation of MinGW on drive D:! Once I removed it, things worked perfectly. God, I feel so silly.

i ran into this exact same problem if it wasn't for this forum i would have been stuck

Mee too!! I have this problem aproximatly a year ago and its stressing. So Thanks Mr_Miguel because is a simple program like WinGW that don't let the devc++ copile perfectly and i simply unistall Wingw and dev copile without a ploblem!!! THANKSSSSSSSSS

You have 2 copies of MinGW installed.

I felt like smacking my head against the nearest wall when I figured it out after hours of Googling.

*edit*
Ah okay, I see it's already solved.
*/edit*