Thanks for your quick reply, Adam.
Is this a 64bit Fedora?
Actually, I'm using a 32-bits version.
At which point? It might be enough to install zlib-devel or whatever the package is called on Fedora.
When linking l4/pkg/loader/examples/fprov-l4, this error occurs. Actually, I have zlib-devel 1.2.3 installed in Fedora.
Any suggestions?