compile libphp5.so: library way too heavy

Hi, i've been trying to compile php module (ver. 5.2.9) for apache on
a Centos 5.2 x86_64 system. Everything works well but the final
library is a lot heavier than the usual, 15 Mb. For instance in
Archlinux the compiled library weights 5.3Mb.
 I've used the same configure options that Archlinux uses, except for
--with-kerberos and --with-openssl which I had to add in order to be
able to compile.
 Hope someone can shed some light on this.
 Cheers,


-- 
Ramiro Blanco