Initial configure and make performed as done for 4.02b2 with success.

Make proceeds to start building Zend with ./libtool but chokes as follows:

dns1: {2447} %make
/bin/sh ./libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I/usr/home/brad/php-4.0b3/./libzend -I.     -g -O2 -g -c -o zend_execute.lo zend_execute.c
zend_execute.c: In function `execute':
zend_execute.c:2118: virtual memory exhausted
*** Error code 1

Stop.

Perhaps not coincidentally, zend_execute.c is 2118 lines long.  Using limit(1) to increase per-process limits didnt do anything useful, not suprising since top(1) reports plenty of memory available during the make.

Same result was achieved on 2 other BSD/OS (BSDI) machines, one 4.0 and another 4.0.1.