Compile problem on BSD/OS 4.1

Can anyone tell me why the below is happening? Script started on Fri Jan 14 16:54:41 2000 root@doctor$ cat config_ php configure --prefix=/usr/contrib --localstatedir=/var --infodir=/usr/share/info --mandir=/usr/share/man --with-low-memory --with-elf --with-x --with-apache=/usr/source/apache-1.3 --with-iodbc --with-mysql=/usr/contrib --with-zlib --enable-track-vars --with-ftp root@doctor$ gmake gmake all-recursive gmake[1]: Entering directory `/usr/source/php-4.0b3' Making all in libzend gmake[2]: Entering directory `/usr/source/php-4.0b3/libzend' /bin/sh ./libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I/usr/source/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 gmake[2]: *** [zend_execute.lo] Error 1 gmake[2]: Leaving directory `/usr/source/php-4.0b3/libzend' gmake[1]: *** [all-recursive] Error 1 gmake[1]: Leaving directory `/usr/source/php-4.0b3' gmake: *** [all-recursive-am] Error 2 root@doctor$ exit exit Script done on Fri Jan 14 16:55:25 2000