[Please keep me CC'ed on replies] Hi, I got several compile-errors due to implicit decls of some functions in tools/jam/src/* The attached patch makes jam compile for me with gcc trunk. I noticed that building jam with everything -O > 1 produces a binary that segfaults e.g. in rules.c::args_free() for the if clause with gcc-trunk. I did not try to track these segfaults down, fwiw. Please consider applying. TIA and cheers,