tst: passthrough-fuse: update Makefile to link with CYGFUSE or WinFsp-FUSE

tst/passthrough-fuse/.gitignore

@@ -4,3 +4,4 @@ build
 *.vcproj.*
 *.vcxproj.user
 *.exe
+*.install

tst/passthrough-fuse/Makefile

@@ -1,2 +1,18 @@
-passthrough-fuse: passthrough-fuse.c
+usage:
+	@echo "make cygfuse|winfsp-fuse" 1>&2
+	@echo "" 1>&2
+	@echo "   cygfuse         Link with CYGFUSE" 1>&2
+	@echo "   winfsp-fuse     Link with WinFsp-FUSE" 1>&2
+	@exit 2
+
+cygfuse: passthrough-cygfuse
+
+winfsp-fuse: passthrough-winfsp-fuse
+
+passthrough-cygfuse: passthrough-fuse.c
+	gcc $^ -o $@ -g -Wall `pkg-config fuse --cflags --libs`
+
+passthrough-winfsp-fuse: export PKG_CONFIG_PATH=$(PWD)/winfsp.install/lib
+passthrough-winfsp-fuse: passthrough-fuse.c
+	ln -nsf "`regtool --wow32 get '/HKLM/Software/WinFsp/InstallDir' | cygpath -au -f -`" winfsp.install
 	gcc $^ -o $@ -g -Wall `pkg-config fuse --cflags --libs`

tst/passthrough-fuse/README.md

@@ -0,0 +1,7 @@
+`Passthrough-fuse` is a simple FUSE file system that passes all file system operations to an underlying file system.
+
+It can be built with the following tools:
+
+- Using Visual Studio (`winfsp.sln`).
+- Using Cygwin GCC and linking directly with the WinFsp DLL (`make winfsp-fuse`).
+- Using Cygwin GCC and linking to CYGFUSE (`make cygfuse`).