+# -----------------------------------------------------------------------------
+# Support for writing GHC passes in Coq
+
+compiler/coq/Makefile:
+ git submodule update --init compiler/coq
+ cd compiler/coq/; git checkout master
+compiler/coq/build/CoqPass.hs: compiler/coq/Makefile $(wildcard compiler/coq/src/*.v) $(wildcard compiler/coq/src/*.hs)
+ cd compiler/coq; make
+compiler/stage1/build/CoqPass.hs: compiler/coq/build/CoqPass.hs
+ cp compiler/coq/build/CoqPass.hs $@
+compiler/stage2/build/CoqPass.hs: compiler/coq/build/CoqPass.hs
+ cp compiler/coq/build/CoqPass.hs $@