known bugs and fixes in version 0.99b:

• Some compilers (Solaris 5.4 cc, for instance) don't understand the "inline" keyword. If lil-gp fails to compile, try removing the word "inline" from "protos.h" and "select.c" (there's just one occurrence in each file).
• Ant sample problem could fail when PROGN4 terminal is used. In appdef.h of the ant problem, change

#define MAXARGS    3

to

#define MAXARGS    4

• Mystery seg faults for some values of parameter "output.bestn". The second statement of calculate_pop_stats() in "gp.c" (line 530 in an unaltered copy of the file) is

     temp = (individual **)MALLOC ( s->bestn * sizeof ( individual * ) );

Change it to:

     temp = (individual **)MALLOC ( (s->bestn+1) * sizeof ( individual * ) );

• Typo in the app.c of the skeleton/ directory:

void app_eval_fitness ( individual *ind )
{
     . . .
     set_current_individiaul ( ind );

should of course be

void app_eval_fitness ( individual *ind )
{
     . . .
     set_current_individual ( ind );