Add Makefile

Makefile

@@ -0,0 +1,19 @@
+CSM := csm
+PREFIX := /usr/local
+INSTALL := install
+
+.PHONY: all
+all: Makefile.csm
+	$(MAKE) -f Makefile.csm
+
+Makefile.csm:
+	$(CSM) -makefile Makefile.csm
+
+.PHONY: clean
+clean: Makefile.csm
+	$(MAKE) -f Makefile.csm clean
+	rm -f Makefile.csm rain
+
+.PHONY: install
+install:
+	$(INSTALL) -sDm755 rain $(DESTDIR)$(PREFIX)/bin/rain

README.md

@@ -1,13 +1,15 @@
 # Dependencies
 
 - [https://call-cc.org](CHICKEN Scheme) 5 or 6,
-- A few CHICKEN extensions, installable using: ```sh
+- A few CHICKEN extensions, installable using:
+```sh
 chicken-install -s html-parser openssl http-client matchable srfi-18
 ```
 
 # Building
 
-Compile using `csm` (requires `chicken-install -s csm`), or run `rain.sld` directly.
+- Compile and install using `make` and `sudo make install`.
+- Alternatively, run `./rain.sld` directly.
 
 # License