Build an Xcode project on a Linux machine

Question

Without writing a GNUmakefile by hand, do any tools exist that understand Xcode projects and can build them directly against GNUstep, producing a Linux executable, thus simplifying (slightly) the work required to keep projects functional under Cocoa/Mac and GNUstep/Linux?

Basically, is there an xcodebuild style app for Linux?

I looked at pbtomake a few weeks ago but it seems to be a dead project.

Answer 1

I think you can use GNUstep pbxbuild which is different from the the Mac OS X one. I am not sure how fully featured it is but it's surely worth to try it out.