Libary Trouble

[Jimage]

I'm building a library based on Allegro for my commonly used code. The compile works, but when the linker kicks in I'm given an error message that one of the functions it contains cannot be found. Have I overlooked something here?

Here's an overview of the code:

Library
jlib/jlib.h

void increment_global_timer();
void init_global_timer();

jlib/jlib.c

#include <allegro.h>
#include "jtimer.h" // only contains 'int init();'

volatile int global_timer;

void increment_global_timer()
// [ place another frame onto the stack ] //
{
  ++global_timer;
}
END_OF_FUNCTION (increment_global_timer);

// [ setup the global timer ] //
void init_global_timer()
{
  LOCK_VARIABLE(global_timer);
  LOCK_FUNCTION(increment_global_timer);

  install_int_ex(increment_global_timer, BPS_TO_TIMER(60));

  // [ randomise ] //
  srand ((unsigned int)time(NULL));
}

jlib.h

#include "jlib/jtimer.h"

Game

#include <allegro.h>
#include <jlib.h>
#include "init.h"
#include "maps.h"

int init()
{
  allegro_init();
  install_timer();
  install_keyboard();

  init_global_timer();

  init_maps();
}

Error

[Linker error] undefined reference to `init_global_timer'

Cheers.

[Salem]

You need to tell the linker the name and location of your 'jlib' library.

[Jimage]

Thanks. Specifying its location worked.

How would I go about getting it to link via a simple -jlib or -ljlib flag at the command line instead of its entire path?

[Salem]

Assuming gcc, the -L flag allows you to specify library search directories.