in reply to
Re^2: How to load a font?
in thread How to load a font?
You don't say which platform on, so it's hard to be specific.
Most Linux distributions, for example, will only install the shared libraries when you install say the "libpng" package, but Imager also needs the header files, which means you need to install -dev or -devel package too, eg, libfreetype6 on Debian gives you the Freetype 2 libraries, but you also need to install libfreetype6-dev to get the headers that Imager needs to build its freetype 2 code.