Makefile: Accept $(MINGW) instead of $(INCS)

Author: klutzy

Makefile

@@ -2,13 +2,18 @@ EMCC?=emcc
 EMXX?=em++
 COFFEE?=coffee
 
-# you may have to add mingw path like this.
-#INCS?=-I/path/to/mingw/include
+# you may have to define mingw path like this.
+#MINGW?=/path/to/mingw
 
 DEFS=-D_X86_ -DWIN32 -DUNICODE -DWIN32_LEAN_AND_MEAN
 OBJS=src/library_win32.js src/window.js
 EXAMPLES=examples/hello.js
 
+INCS=
+ifdef MINGW
+	INCS=-I $(MINGW)/include
+endif
+
 .PHONY: all
 all: $(OBJS)
 
@@ -17,6 +22,7 @@ src/%.js: src/%.coffee
 
 .PHONY: examples
 examples: $(EXAMPLES)
+	mkdir -p examples/lib
 	$(MAKE) -C lib/fake-mswin assets OUTDIR=../../examples/lib
 
 examples/%.js: examples/%.cpp all

README.md

@@ -10,8 +10,8 @@ You need no Windows to run win32.js project.
     use a prebuilt package if available.
     -   For Windows, You may use [clang-win32][] binary.
 3.  Clone this repository. Note there is [fake-mswin][] submodule in use.
-4.  `make examples`. It will build `examples/hello.cpp` to
-    `examples/hello.js`.
+4.  Execute `MINGW=/path/to/mingw make examples`.
+    `examples/hello.cpp` is compiled into `examples/hello.js`.
 5.  Open `examples/hello.html` using modern web browser.
 
 [w32api]: http://sourceforge.net/projects/mingw/files/MinGW/Base/w32api/