an error compile-time

Heya, I do a '/configure --with-pgsql --without-mysql --with-pdflib --with-apache=/tmp/apache_1.3.11 --enable-shared --enable-track-vars --enable-trans-sid' then when making, it all ends with: gcc -I. -I/tmp/php-4.0.3pl1/ext/standard -I/tmp/php-4.0.3pl1 -I/tmp/php-4.0.3pl1/main -I/tmp/apache_1.3.11/src/include -I/tmp/apache_1.3.11/src/os/unix -I/tmp/php-4.0.3pl1/Zend -I/tmp/php-4.0.3pl1 -I/tmp/php-4.0.3pl1/ext/xml/expat/xmltok -I/tmp/php-4.0.3pl1/ext/xml/expat/xmlparse -I/tmp/php-4.0.3pl1/TSRM -DXML_BYTE_ORDER=12 -g -O2 -c microtime.c && touch microtime.lo microtime.c: In function `php_if_getrusage': microtime.c:97: storage size of `usg' isn't known microtime.c:100: `RUSAGE_SELF' undeclared (first use in this function) microtime.c:100: (Each undeclared identifier is reported only once microtime.c:100: for each function it appears in.) microtime.c:106: `RUSAGE_CHILDREN' undeclared (first use in this function) make[3]: *** [microtime.lo] Error 1 make[3]: Leaving directory `/tmp/php-4.0.3pl1/ext/standard' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/tmp/php-4.0.3pl1/ext/standard' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/tmp/php-4.0.3pl1/ext' make: *** [all-recursive] Error 1 please help out..quite frustrated by now.. ~mac0