Re: [Boost-users] using filesystem library

From: Roman Neuhauser (neuhauser_at_[hidden])
Date: 2006-08-06 05:41:57

# phddas_at_[hidden] / 2006-08-05 21:14:25 -0700:
> **************** code ****************
> #include <iostream>
> #include <string>
> #include "boost/filesystem/operations.hpp" // includes boost/filesystem/path.hpp
> #include "boost/filesystem/fstream.hpp"    
> namespace fs = boost::filesystem;
> 
> using namespace std;
> 
> int main(){
>    
>    fs::path full_path("../data");
>    if (exists(full_path)) cout << "yes" << endl;
>    
> }
> //there exists data directory in the parent of the current directory.
> 
> **************** error ****************
> $ make
> g++ -gdwarf-2   -c -o try.o try.cpp
> g++ -Wall -gdwarf-2 -o proj try.o
> try.o: In function `main':
> /home/fred/myPrograms/backtest/try/try.cpp:11: undefined reference to `boost::filesystem::path::path(char const*)'
> /home/fred/myPrograms/backtest/try/try.cpp:12: undefined reference to `boost::filesystem::exists(boost::filesystem::path const&)'
> collect2: ld returned 1 exit status
> make: *** [proj] Error 1

    You need to link with libboost_filesystem.a or
    libboost_filesystem.so.

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