It gives me a compile error against 5.3.8. I run phpize, then configure and then make:
/bin/sh /root/runkit/runkit-0.9/libtool --mode=compile cc -I. -I/root/runkit/runkit-0.9 -DPHP_ATOM_INC -I/root/runkit/runkit-0.9/include -I/root/runkit/runkit-0.9/main -I/root/runkit/runkit-0.9 -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/runkit/runkit-0.9/runkit.c -o runkit.lo mkdir .libs cc -I. -I/root/runkit/runkit-0.9 -DPHP_ATOM_INC -I/root/runkit/runkit-0.9/include -I/root/runkit/runkit-0.9/main -I/root/runkit/runkit-0.9 -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /root/runkit/runkit-0.9/runkit.c -fPIC -DPIC -o .libs/runkit.o /root/runkit/runkit-0.9/runkit.c: In function ‘zif_runkit_zval_inspect’: /root/runkit/runkit-0.9/runkit.c:61: error: ‘zval’ has no member named ‘refcount’ /root/runkit/runkit-0.9/runkit.c:62: error: ‘zval’ has no member named ‘is_ref’ /root/runkit/runkit-0.9/runkit.c: In function ‘zm_deactivate_runkit’: /root/runkit/runkit-0.9/runkit.c:360: warning: passing argument 2 of ‘zend_hash_apply’ from incompatible pointer type /root/runkit/runkit-0.9/runkit.c:370: warning: passing argument 2 of ‘zend_hash_apply’ from incompatible pointer type /root/runkit/runkit-0.9/runkit.c:378: warning: passing argument 2 of ‘zend_hash_apply_with_arguments’ from incompatible pointer type make: *** [runkit.lo] Fehler 1