Add GhcStage{1,2,3}HcOpts, empty by default
# used to compile GHC. Useful when bootstrapping.
GhcHcOpts=-Rghc-timing
+# Extra options added to specific stages of the compiler bootstrap.
+# These are placed later on the command line, and may therefore
+# override options from $(GhcHcOpts).
+GhcStage1HcOpts=
+GhcStage2HcOpts=
+GhcStage3HcOpts=
+
# Build a compiler that will build *unregisterised* libraries and
# binaries by default. Unregisterised code is supposed to compile and
# run without any support for architecture-specific assembly mangling,