Pb still occurs :

php 4.0.4pl1,gcc 2.95.2,unixware 7.1.1

./configure --with-mysql=/appl/mysql --with-apache=../../apache_1.3.14 --enabl
e-track-vars --disable-shared

make 

.....
.....
.....
gcc  -I. -I/appl/jq/php-4.0.4pl1/ext/standard -I/appl/jq/php-4.0.4pl1/main -I/ap
pl/jq/php-4.0.4pl1 -I/appl/apache_1.3.14/src/include -I/appl/apache_1.3.14/src/o
s/unix -I/appl/jq/php-4.0.4pl1/Zend -I/appl/mysql/include -I/appl/jq/php-4.0.4pl
1/ext/xml/expat/xmltok -I/appl/jq/php-4.0.4pl1/ext/xml/expat/xmlparse -I/appl/jq
/php-4.0.4pl1/TSRM -I/appl/jq/php-4.0.4pl1/main -I/appl/jq/php-4.0.4pl1/Zend -I/
appl/jq/php-4.0.4pl1/TSRM  -DXML_BYTE_ORDER=12 -g -O2  -c mail.c && touch mail.l
o
mail.c:28: sysexits.h: No such file or directory
make[3]: *** [mail.lo] Error 1
make[3]: Leaving directory `/appl/jq/php-4.0.4pl1/ext/standard'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/appl/jq/php-4.0.4pl1/ext/standard'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/appl/jq/php-4.0.4pl1/ext'
make: *** [all-recursive] Error 1

modified #include <sysexits.h> in mail.c
by
#include "/usr/ucbinclude/sysexits.h" 

Correction found in bug report 7087 for PHP Version: 4.0.2
with status closed, and confusing object !!