Makefile now works with: global runghc, stack-only runghc, and falls back to shell script.

Makefile

@@ -1,16 +1,32 @@
-# A simple wrapper over the Haskell-based RGL build script
+# A wrapper over the Haskell and Bash build scripts
+# Will try and fallback in order:
+#   - runghc Setup.hs
+#   - stack runghc Setup.hs
+#   - ./Setup.sh
 
-RUNMAKE=runghc Setup.hs
+ifneq (, $(shell which runghc))
+RUNGHC=runghc Setup.hs
+else ifneq (, $(shell which stack))
+RUNGHC=stack runghc Setup.hs
+else
+RUNGHC=
+endif
 
 .PHONY: build copy install doc clean
 
 default: build copy
 
 build: src/*/*.gf
-	$(RUNMAKE) build
+ifneq (, $(RUNGHC))
+	$(RUNGHC) build
+else
+	./Setup.sh
+endif
 
 copy:
-	$(RUNMAKE) copy
+ifneq (, $(RUNGHC))
+	$(RUNGHC) copy
+endif
 
 install: build copy
 
@@ -18,4 +34,8 @@ doc: build
 	make -C doc GF_LIB_PATH=../dist
 
 clean:
-	$(RUNMAKE) clean
+ifneq (, $(RUNGHC))
+	$(RUNGHC) clean
+else
+	rm -r dist
+endif