LibphpX.so not found!

[calvinscy]

I install and configure Php 4 or Php 5 from very begining. So I configure, make and make install as manual guide to
deploy PHP. All are working fine (no error), but why it cannot create a file called libphpX.so? Because when Apache start, it show error that it cannot find libphpX.so file.

I search all the directories and cannot find libphpX.so created. Why ?

[ruturajv]

what is that file, you need to put that file in a path that is specified in the apache's httpd.conf