For what I knowJUCE actually doesn’t generate a project in Linux like it generates an Xcode one in Mac or a VS Studio in Windows, it generates a Makefile. I may be wrong tho as I haven’t tried CodeBlocks, but it’s as easy as compiling the Makefile with make (either gcc or clang, but clang tends to give me less headaches in Raspberry)
Here’s some post about it as you will need to install some dependencies first: