Windows build broken in Linker.c

Simon Aargh! I think the Windows build is broken again. I think this is your commit 5300099ed Admittedly this is on a branch I'm working on, but it's up to date with HEAD. And I have no touched Linker.c! Any ideas? Simon rts\Linker.c: In function 'allocateImageAndTrampolines': rts\Linker.c:3708:19: error: 'arch_name' undeclared (first use in this function) rts\Linker.c:3708:19: note: each undeclared identifier is reported only once for each function it appears in rts/ghc.mk:236: recipe for target 'rts/dist/build/Linker.o' failed make[1]: *** [rts/dist/build/Linker.o] Error 1 make[1]: *** Waiting for unfinished jobs....