Zend debugger depends on libssl.0.9.8, the one that is in repository just for 32bit architecture.
Actual debugger-64bit don't want to use 32bit libssl.so file with error (php -m):
Failed loading /usr/lib/php5/ZendDebugger.so: libssl.so.0.9.8: wrong ELF class: ELFCLASS32
How is it possible to acquire right libssl.so for this debugger or stack debugger-32bit with built php.so