I'm trying to ./compile Perfparse on my Nagios CentOS 4.x box, but am having this error. (And am hoping someone here might point me in the right direction) "configure: error: required library libgd unusable." Here is a history of my problems: First, it ./configure 'd ok, but I couldn't "make && make install" due to an error. I googled and found this FAQ on the the subject (http://perfparse.de/tiki-view_faq.php?faqId=1) ********************************************************* Q: When i try to compile, i get errors like: perfparse-0.105.5/perfparse/storage.c:269: undefined reference to `g_path_get_basename' A: Try this: cd perfparse make copy & paste the "/bin/sh ../libtool ...." line and add "/opt/gnome/lib64/libglib-2.0.so" at the end. The path may vary. Try to find the libglib-2.0.so. Then try again with "make". ********************************************************* Not sure what happened, but it eventually was working, and later I got past that error and got a "gdImage" error when I tried to "make && make install". (This too is on the FAQ page) ********************************************************* "A: The gd library is probably not installed yet on your system. Or you are missing the development package such as libgd-devel or libgd-dev. Install gd and try again." ********************************************************* Not knowing what to do (gd-2.0.28-5.4E and gd-devel-2.0.28-5.4E were installed), we "yum removed" these packages (which destroyed Nagios, and I had to reinstall and reconfigure that too), and ever since, I've gotten that ""configure: error: required library libgd unusable" error whenever I've tried to ./configure with the automake tools. Any advice would be greatly appreciated!