Running ./configure multiple times

Well my RedHat system got hosed, so I reinstalled everything. I'm back to installing PHP now, and I'm wondering if it's safe for me to run ./configure multiple times. Here's the situation: I want to compile with gd support, and pdflib, and a bunch of other options.. Instead of running a whole huge 5 line ./configure, can I run one at a time to make sure they all work, then run the whole thing? Also, just noticed this: I have gd installed, and libgd.so in /usr/lib, so I tried ./configure --with-apxs --with-gd=/usr/lib/ (also tried without the trailing /), but it gives: configure: error: Unable to find libgd.(a|so) anywhere under /usr/lib/ What gives? (in this ouptut, the stuff that's not important is cut out -- dates, etc) [root@saturn php-4.2.2]# ls -l /usr/lib/libgd.* lrwxrwxrwx Š /usr/lib/libgd.so -> libgd.so.1.8.3 lrwxrwxrwx Š /usr/lib/libgd.so.1 -> libgd.so.1.8.3 lrwxrwxrwx Š /usr/lib/libgd.so.1.8 -> libgd.so.1.8.3 lrwxrwxrwx Š /usr/lib/libgd.so.1.8.3 [root@saturn php-4.2.2]# TIA, c.