Refactoring build

The swift-tcl build is now created from 4 repositories. This makes it possible
to build Tcl extensions and programs using the Swift Package Manager.

make -C swift-tcl8.6 install
make -C swift-tcl install
make -C swift-tcl-demo test
make -C swift-tcl-extension-demo test

.gitignore

@@ -1,2 +1,3 @@
-SwiftTcl.xcodeproj
-.build
+.build/*
+Package.pins
+SwiftTcl.xcodeproj/*

Makefile

@@ -1,22 +1,41 @@
-#
-# tcl library path for brew - needs to be parameterized somehow
-#
-# version for TCL brew package
-TCLVERSION=8.6.6_2
-BREWROOT=/usr/local/Cellar
-TCLLIBPATH=$(BREWROOT)/tcl-tk/$(TCLVERSION)/lib
-TCLINCPATH=$(BREWROOT)/tcl-tk/$(TCLVERSION)/include
+UNAME_S := $(shell uname -s)
 
-BUILD=./.build
+ifeq ($(UNAME_S),Linux)
+    EXTRA_SWIFTLINK=
+    TARGET = .build/debug/libSwiftTcl.so
+endif
 
-default: SwiftTcl.xcodeproj
+ifeq ($(UNAME_S),Darwin)
+    TCLVERSION=8.6.6_2
+    BREWROOT=/usr/local/Cellar
+    TCLLIBPATH=$(BREWROOT)/tcl-tk/$(TCLVERSION)/lib
+    TCLINCPATH=$(BREWROOT)/tcl-tk/$(TCLVERSION)/include
+    EXTRA_SWIFTLINK=-Xlinker -L/usr/local/lib \
+        -Xlinker -L$(TCLLIBPATH) \
+        -Xcc -I$(TCLINCPATH)
+    TARGET = .build/debug/libSwiftTcl.dylib
+endif
 
-build: $(BUILD)
+default: $(TARGET)
 
-$(BUILD): Package.swift Makefile
-	swift build -Xlinker -L$(TCLLIBPATH) -Xlinker -ltcl8.6 -Xlinker -ltclstub8.6 -Xlinker -lz -Xcc -I$(TCLINCPATH)
+$(TARGET): Package.swift Makefile
+	swift build $(EXTRA_SWIFTLINK)
 
 SwiftTcl.xcodeproj: Package.swift Makefile build
-	swift package -Xlinker -L$(TCLLIBPATH) -Xlinker -ltcl8.6 -Xlinker -ltclstub8.6 generate-xcodeproj
+	swift package $(EXTRA_SWIFTLINK) generate-xcodeproj
 	@echo "NOTE: You will need to manually set the working directory for the SwiftTclDemo scheme to the root directory of this tree."
 	@echo "Thanks Apple"
+
+ifeq ($(UNAME_S),Linux)
+install: $(TARGET)
+	cp $(TARGET) /usr/lib/x86_64-linux-gnu
+	ldconfig /usr/lib/x86_64-linux-gnu/libSwiftTcl.so
+endif
+
+ifeq ($(UNAME_S),Darwin)
+install: $(TARGET)
+	cp $(TARGET) /usr/local/lib
+endif
+
+clean:
+	rm -rf $(TARGET) .build Package.pins

Package.swift

@@ -4,9 +4,10 @@ import PackageDescription
 
 let package = Package(
     name: "SwiftTcl",
-    targets: [Target(name: "Tcl8_6"),
-              Target(name: "SwiftTcl_c", dependencies:["Tcl8_6"]),
-              Target(name: "SwiftTcl", dependencies:["SwiftTcl_c"]),
-              Target(name: "SwiftTclDemo", dependencies:["SwiftTcl"])]
+	dependencies: [
+		.Package(url: "https://github.com/flightaware/swift-tcl8.6.git", majorVersion: 1)
+	]
 )
 
+let libSwiftTcl = Product(name: "SwiftTcl", type: .Library(.Dynamic), modules: "SwiftTcl")
+products.append(libSwiftTcl)