[Flightgear-devel] Trying to build an interface to flightgear

[cory barton]

I am trying to build an interface to FlightGear for UAV simulation.

Here is the basic idea: construct a piece of software which reads
properties from FlightGear via UDP or Serial, and sends control
commands to FlightGear via UDP or serial.

I found the Atlas project which does part of what I am trying to do,
so I am building my code based on the Atlas code.

I am having trouble using the simgear socket libraries however. When I
build my file, I get the following errors:
softSim.cpp:(.text+0x4f1): undefined reference to
`SGSocket::SGSocket(std::basic_string<char, std::char_traits<char>,
std::allocator<char> > const&, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&,
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
const&)'
softSim.cpp:(.text+0x66c): undefined reference to
`SGSerial::SGSerial(std::basic_string<char, std::char_traits<char>,
std::allocator<char> > const&, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)'
softSim.cpp:(.text+0x7d7): undefined reference to
`SGSocket::SGSocket(std::basic_string<char, std::char_traits<char>,
std::allocator<char> > const&, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&,
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
const&)'

I have simgear 1.0.0 installed.

I am using ubuntu 8.04
Simgear is installed in: /usr/local/include/simgear/

This is the build command in Geany: g++ -Wall "%f" -lglut

Here are what I believe to be the relevant excerpts from my code:

Include statements and SGIOChannel initialization:
#include <memory.h>
#include <stdio.h>
#include <simgear/compiler.h>
#include SG_GLUT_H
#include <plib/fnt.h>
#include <plib/pu.h>
#include <string>
#include <simgear/io/sg_socket.hxx>
#include <simgear/io/sg_serial.hxx>

SGIOChannel *input_channel;

this is the offending code inside the main function:
  if (slaved) {
    glutTimerFunc( (int)(1000.0f/update), timer, 0 );

    if ( network ) {
        input_channel = new SGSocket( "", port, "udp" );
    } else if ( serial ) {
        input_channel = new SGSerial( device, baud );
    } else {
        printf("unknown input, defaulting to network on port 5500\n");
        input_channel = new SGSocket( "", "5500", "udp" );
    }
    input_channel->open( SG_IO_IN );
  }


Please help me resolve these errors. Also if you think I am on the
wrong track for what I am trying to accomplish, please let me know.

Thanks,

Cory

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