Hi, I'm getting an odd link error trying to build with ghc 6.2.2 on OS X, and can't figure out what's going on. From it's form, I assume that the symbol is part of the runtime, but greping the files in /usr/ local/lib/ghc-6.2.2 returns no results. dhcp2934:~/Documents/hat tatd2$ make cd src/hattools; make HC=ghc install hmake -hc=ghc -I. -I/Users/tatd2/Documents/hat/include -fglasgow-exts -package lang -package util -DUSE_READLINE=1 HatStack /Users/tatd2/ Documents/hat/targets/powerpc-Darwin8/obj/hattools/pathutils.o /Users/ tatd2/Documents/hat/targets/powerpc-Darwin8/obj/hattools/artutils.o / Users/tatd2/Documents/hat/targets/powerpc-Darwin8/obj/hattools/ finitemap.o \ -d/Users/tatd2/Documents/hat/targets/powerpc-Darwin8/obj/ hattools cd /Users/tatd2/Documents/hat/targets/powerpc-Darwin8/obj/hattools && ghc -fglasgow-exts -package lang -package util -I. -I/Users/tatd2/ Documents/hat/include -i. -i/Users/tatd2/Documents/hat/include -o HatStack Run.o CommonUI.o Ident.o FFIExtensions.o HighlightStyle.o PrettyLibHighlight.o SExp.o SrcRef.o LowLevel.o HatStack.o /Users/ tatd2/Documents/hat/targets/powerpc-Darwin8/obj/hattools/pathutils.o / Users/tatd2/Documents/hat/targets/powerpc-Darwin8/obj/hattools/ artutils.o /Users/tatd2/Documents/hat/targets/powerpc-Darwin8/obj/ hattools/finitemap.o /usr/bin/ld: Undefined symbols: _GHCziTopHandler_runMainIO_closure collect2: ld returned 1 exit status make[1]: *** [/Users/tatd2/Documents/hat/lib/powerpc-Darwin8/hat- stack] Error 1 make: *** [targets/powerpc-Darwin8/hat-tools-ghc] Error 2 Has anyone got any idea what's going on? Bob