During compiling with:
--with-mysql --with-apxs --with-gd --with-jpeg-dir

I get the error:
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

I get this with both php4.0.0 and php4.0.2 !!

MWP