I recently got Webpack to sorta work for me on my Linux system... but I tried using ISim for simulation of my designs and got hit by a problem. And from what I can tell, this problem isn't Xilinx's problem, since I'm not using a supported OS(Arch Linux)... and I can't figure out how to fix it... so I'm going to do something that hopefully is easier in the long run.
Anyway, I want to use ghdl/gtkwave for simulation, and then use Webpack's tools only for when I need to generate a bitstream for uploading to my FPGA... And I want it all to be run easily from a makefile. Of all the makefiles I've seen for using their command line tools though, they all require a project file. I'd really rather just specify files manually somehow in my makefile. I'd rather not have to, every time I add a file, change the project and my makefile. Is this possible?