PHP 5.2 to 5.3 upgrade Solaris 9

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http://serverfault.com – I am trying to upgrade PHP 5.2.13 to 5.3.16 in Solaris 9 SPARC box. I have installed many extensions in the current version (5.2.13). The installation of PHP 5.2.13 was through binaries and not through source. The extnesions were installed through source via configure, make, make install commands. While upgrading, is it enough if I copy over the .so files across to extensions directory or configure them afresh? Any info is well appreciated. Thank you SKB (HowTos)