Record details of the fptools/mk/build.mk required to build Hugs.
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+
+You need to have a fptools/mk/build.mk which looks like this in
+order to build Hugs which has a hope of working in combined mode.
+
+WithGhcHc=ghc-4.06 # or whatever; version not v. important
+GhcLibWays=u # essential
+GhcHcOpts=-DDEBUG -fasm-x86 # -fasm-x86 is optional
+GhcRtsHcOpts=-optc-DDEBUG -optc-D__HUGS__ -unreg -optc-g
+GhcRtsCcOpts=-optc-DDEBUG -optc-g -optc-D__HUGS__
+SplitObjs=NO # essential