text: #ifndef IMAGER_IMEXTDEF_H
  #define IMAGER_IMEXTDEF_H
  
  #include "imexttypes.h"
  
  extern im_ext_funcs imager_function_table;
  
  #define PERL_SET_GLOBAL_CALLBACKS \
    sv_setiv(get_sv(PERL_FUNCTION_TABLE_NAME, 1), PTR2IV(&imager_function_table));
  
  #endif
  