If you're using Inline::C then it's as simple as setting the AUTO_INCLUDE (and optionally INC) parameter and calling the appropriate functions from within the C code.

You could learn up on XS and write your own module, but this route in somewhat trickier.

There's also the handy C::DynaLib module which is specifically designed for interfacing with C libraries from within perl. Here's an example from the module docs

  use C::DynaLib;
  $libc = new C::DynaLib("-lc");
  $strncmp = $libc->DeclareSub("strncmp", "i", "p", "p", "I");
  $string1 = "foobar";
  $string2 = "foolish";
  $result = &{$strncmp}($string1, $string2, 3);  # $result is 0
  $result = &{$strncmp}($string1, $string2, 4);  # $result is -1
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HTH

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broquaint