I tried to install php5 with imap and therefore used the libc-client library but apache (2.2.2) cannot start and throws me this error: httpd: Syntax error on line 53 of /usr/local/httpd/conf/httpd.conf: Cannot load /usr/local/httpd/modules/libphp5.so into server: /usr/lib/libc-client.so.2002edebian: undefined symbol: mm_dlog apache 2.2.2 and php 5.1.4 are both compiled from source not from debian. I found a bug report for the same error on php bug report but this was against the gentoo libc-client libraries.