mcrypt support

Has anyone had any success building mcrypt/mhash support into
PHP-4.0RC1? I'm using:

 libmcrypt-2.2.6
 mhash-0.8.1
 mcrypt-2.5.3

On Linux compilation chokes with 

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) 

On Solaris (Intel and SPARC) I can build the .so, but Apache segfaults
on startup. Any pointers?


Rob