C++ library in using boost library - c++

Question

I wrote a test.cpp:
#include <iostream>
#include <stack>
#include <boost/lexical_cast.hpp>
#include <boost/config/warning_disable.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>
using namespace std;
namespace phoenix = boost::phoenix;
namespace qi = boost::spirit::qi;
namespace ascii = boost::spirit::ascii;
struct calculator
{
bool interpret(const string& s);
void do_neg();
void do_add();
void do_sub();
void do_mul();
void do_div();
void do_number(const char* first, const char* last);
int val() const;
private:
stack<int> values_;
int *pn1_, n2_;
void pop_1();
void pop_2();
};
......................
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But when I use g++ test.cpp -o test, there are errors like boost/lexical_cast.hpp: No such file or directory, but I have copy all of files in boost (download from boost.org) to the test.cpp folder, how to make g++ know the headers paths? Thanks
I used g++ test.cpp -o test
Using " " is not possible, I have a lot of header's dependency.

Answer 1

You have to make sure you modify the include to g++'s command. Reading from the man page (which is your best friend for this sorta stuff):
Add the directory dir to the list of directories to be searched for
header files. Directories named by -I are searched before the
standard system include directories. If the directory dir is a
standard system include directory, the option is ignored to ensure
that the default search order for system directories and the
special treatment of system headers are not defeated . If dir
begins with "=", then the "=" will be replaced by the sysroot
prefix; see --sysroot and -isysroot.
For you the command should look like this:
g++ -I path/to/boost test.cpp