So you want to add postgres support to PHP (or something like that), but you don't want to re-compile the whole thing. You just want a shared module.
Its easier than I first thought. Here is how I have done it.
Then I like to put the source in someplace like /usr/local/src/php-4.3.8
/usr/local/src/php-4.3.8 # ./configure --with-pgsql=shared,/usr/local/pgsql /usr/local/src/php-4.3.8 # make /usr/local/src/php-4.3.8 # cp modules/pgsql.so /usr/lib64/php/extensions/
Note we only have to use the configuration line for the shared module we are compiling. We specify that we want it as a shared module, and the path (if needed). This of course assumes you already have postgres installed.
Then load that extension from php.ini by adding the following line.
[extension section] extension=pgsql.so
Restart apache, and check your phpinfo() page again. You should see a section titled pgsql
Thats it =)