Getting Boost asio to work - c++

Question

I am trying to use the Boost asio library to for sockets.
I installed boost using homebrew brew install boost
After it was built I tried the tutorial for creating a server on boost's website.
All I did was paste that code into a file called main.cc
When I try to compile g++ main.cc I get this error:
Undefined symbols for architecture x86_64:
"boost::system::system_category()", referenced from:
__static_initialization_and_destruction_0(int, int)in ccTbzxpk.o
boost::asio::error::get_system_category() in ccTbzxpk.o
boost::system::error_code::error_code()in ccTbzxpk.o
"boost::system::generic_category()", referenced from:
__static_initialization_and_destruction_0(int, int)in ccTbzxpk.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
What is going wrong?

Answer 1

Those are linker errors. If you read the docs:
The following libraries must be available in order to link programs
that use Boost.Asio:
Boost.System for the boost::system::error_code and
boost::system::system_error classes.
Boost.Regex (optional) if you use
any of the read_until() or async_read_until() overloads that take a
boost::regex parameter.
OpenSSL (optional) if you use Boost.Asio's SSL
support.
Furthermore, some of the examples also require the Boost.Thread,
Boost.Date_Time or Boost.Serialization libraries.
Now, the errors you posted all say: boost::system, this means you need to link like this (assuming everything is the default):
g++ main.cc -lboost_system
Please read What do 'statically linked' and 'dynamically linked' mean? for in-depth information about linking.