scheme PLT Scheme(DrScheme) is an interactive, integrated, graphical programming environment for the Scheme, MzScheme, and MrEd programming languages. PLT Scheme provides source highlighting for syntax and run-time errors, support for multiple language levels, an algebraic stepper, objects, modules, a GUI library, TCP/IP, and much more. It includes an extensive, hyper-linked help system called Help Desk. Compile drscheme3m binary that uses the 3m GC instead of the Boehm GC Support GC backtrace dumps Compile and install additional executables which use the conservative garbage collector Add support for compiling to the low-level virtual machine (llvm) Add support for xft Add support for xrender