When i try to compile php4B3 receive the following errors :

main.c: In function `php_module_startup':
main.c:864: `block_alarms' undeclared (first use in this function)
main.c:864: (Each undeclared identifier is reported only once
main.c:864: for each function it appears in.)
main.c:865: `unblock_alarms' undeclared (first use in this function)
main.c: In function `zend_hash_environment':
main.c:1024: warning: initialization makes pointer from integer without a cast
make[2]: *** [main.lo] Error 1
make[2]: Leaving directory `/home/marco/php-4.0b3'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/marco/php-4.0b3'
make: *** [all-recursive-am] Error 2