install problem please help

when I follow instruction to install php4 after run make got message as below Making all in Zend
make[1]: Entering directory `/home/anna/public_html/php-4.0.0/Zend'
/bin/sh ../libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -DXML_BYTE_ORDER=12 -g -O2 -Wall -c zend-scanner.c
In file included from /usr/include/errno.h:36,
from ./zend-scanner.l:41:
/usr/include/bits/errno.h:25: linux/errno.h: No such file or directory
make[1]: *** [zend-scanner.lo] Error 1
make[1]: Leaving directory `/home/anna/public_html/php-4.0.0/Zend'
make: *** [all-recursive] Error 1

can anybody help?
please.
anna