-# Order is important! driver/ has to come before includes/ which
-# again has to come before the rest.
-#
-# If we're booting from .hc files, swap the order
-# we descend into compiler/ and lib/
-#
-ifeq "$(GhcWithHscBuiltViaC)" "NO"
-SUBDIRS = utils driver includes runtime compiler lib
-else
-SUBDIRS = utils driver includes runtime lib compiler
-endif
-
-include $(TOP)/mk/target.mk
+# -----------------------------------------------------------------------------
+
+dir = ghc
+TOP = ..
+SPEC_TARGETS = 1 2 3
+include $(TOP)/mk/sub-makefile.mk
+
+FAST_MAKE_OPTS += compiler_stage1_NO_BUILD_DEPS=YES \
+ compiler_stage2_NO_BUILD_DEPS=YES \
+ compiler_stage3_NO_BUILD_DEPS=YES \
+ ghc_stage1_NO_BUILD_DEPS=YES \
+ ghc_stage2_NO_BUILD_DEPS=YES \
+ ghc_stage3_NO_BUILD_DEPS=YES
+
+.PHONY: 1 2 3
+
+1:
+ +$(TOPMAKE) stage=1 all_ghc_stage1 $(FAST_MAKE_OPTS) NO_STAGE1_DEPS=YES NO_STAGE2_DEPS=YES
+
+2:
+ +$(TOPMAKE) stage=2 all_ghc_stage2 $(FAST_MAKE_OPTS) NO_STAGE2_DEPS=YES
+
+3:
+ +$(TOPMAKE) stage=3 all_ghc_stage3 $(FAST_MAKE_OPTS) NO_STAGE3_DEPS=YES
+
+
+# 'make re2' rebuilds stage2, removing the old executable first. Useful for
+# something like 'make re2 GhcDebugged=YES'.
+
+.PHONY: re1 re2 re3
+re1:
+ $(RM) stage1/build/tmp/ghc-stage1
+ $(MAKE) 1
+re2:
+ $(RM) stage2/build/tmp/ghc-stage2
+ $(MAKE) 2
+re3:
+ $(RM) stage3/build/tmp/ghc-stage3
+ $(MAKE) 3
+
+.PHONY: extra-help
+help : extra-help
+extra-help :
+ @echo " make 1"
+ @echo " make 2"
+ @echo " make 3"
+ @echo
+ @echo " Build the stage 1, 2 or 3 GHC respectively, omitting dependencies"
+ @echo " and initial phases for speed."