Hi there, Tom,
I have successfully installed the Conquest server on Fedora 26.
I installed the following packages:
dnf install gcc-c++-sh-linux-gnu.x86_64 gcc-c++-x86_64-linux-gnu.x86_64 clang.x86_64
I then followed the rest of the instructions (replacing the appropriate steps with Fedora equivalents)
Hope this helps.