Crystal shared library demo

logger.cr

fun init = crystal_init(argc : Int32, argv : UInt8**) : Void
  GC.init
  LibCrystalMain.__crystal_main(argc, argv)
end

fun log = crystal_log(text: UInt8*): Void
  puts String.new(text)
end

logger.def

LIBRARY   logger
EXPORTS
   crystal_init
   crystal_log

logger.h

#ifndef _CRYSTAL_LOGGER_H
#define _CRYSTAL_LOGGER_H

void crystal_init(int argc, char *argv[]);
void crystal_log(char* text);
#endif

main.c

#include "logger.h"

int main(int argc, char *argv[]) {
  crystal_init(argc, argv);
  crystal_log("Hello world!");
}