How do I build simple boost program on Mac OS (Lion) - boost

Question

Steps:
1. sudo port boost
The boost file installed in /opt/local/boost, library files are in /opt/local/lib
2. use XCode to create c++ project
#include <iostream>
#include <boost/asio.hpp>
int main () {
return 0;
}
3. set XCode to find out boost
in "Build Settings" -> "HEADER_SEARCH_PATHS"
in both Debug and Release add path /opt/local/include
4. "Build Settings" -> "LIBRARY_SEARCH_PATHS" --> add /opt/local/lib both for debug and release.
5. build program and failed.
Error Messages,
Undefined symbols for architecture x86_64:
"boost::system::generic_category()", referenced from:
___cxx_global_var_init1 in main.o
___cxx_global_var_init2 in main.o
"boost::system::system_category()", referenced from:
___cxx_global_var_init3 in main.o
boost::asio::error::get_system_category() in main.o
"boost::asio::error::get_netdb_category()", referenced from:
___cxx_global_var_init5 in main.o <br>
"boost::asio::error::get_addrinfo_category()", referenced from:
___cxx_global_var_init6 in main.o <br>
"boost::asio::error::get_misc_category()", referenced from:
___cxx_global_var_init7 in main.o <br>
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Am I wrong in the procedure?

Answer 1

You need to link with Boost.System, which should be in /opt/local/lib/libboost_system (with some suffix, that depends on how you built boost)
Add that to your Xcode project.

Answer 2

select on your "targets"
in "Link Binary with libraries" section under "build phases" tab, add boost library.
if install via MacPort, the boost will be at /opt/local/lib,
if install via brew, the boost will be at /usr/local/Cellar/boost ,
if build by yourself, it will be at /usr/local/lib by default or yourBoostLib/stage/lib