I pushed (again) the changes needed for 64-bit Mac OS X, updated for druntime and phobos2. Will see about MinGW64.
Pushed the 64-bit Windows changes too, compiles but crashes. gdc (GCC) 4.6.2 20110913 (prerelease gdc 0.30, using dmd 2.055) Fortunately one doesn't need Windows, in order to use MinGW... Didn't bother with 32-bit or D1, probably has similar issues. --anders PS. My Mac/Win fork at http://bitbucket.org/anders_f_bjorklund/gdc including the previous patches (not yet merged into the main)