--- Makefile.orig	2016-08-31 08:02:05.000000000 -0500
+++ Makefile	2016-09-13 21:39:52.000000000 -0500
@@ -1,6 +1,5 @@
-ifndef PREFIX
-	PREFIX = /usr/local
-endif
+PREFIX ?= /usr/local
+DESTDIR ?=
 
 LIBPOINTING = libpointing.dylib
 
@@ -8,10 +7,10 @@
 
 SOURCES = src/pointing/utils/Base64.cpp src/pointing/utils/ByteOrder.cpp src/pointing/utils/FileUtils.cpp src/pointing/utils/TimeStamp.cpp src/pointing/utils/URI.cpp src/pointing/utils/ConfigDict.cpp src/pointing/utils/HIDItem.cpp src/pointing/utils/HIDReportParser.cpp src/pointing/utils/PointingCursor.cpp src/pointing/input/PointingDevice.cpp src/pointing/input/DummyPointingDevice.cpp src/pointing/output/DisplayDevice.cpp src/pointing/output/DisplayDeviceManager.cpp src/pointing/output/DummyDisplayDevice.cpp src/pointing/transferfunctions/Composition.cpp src/pointing/transferfunctions/ConstantFunction.cpp src/pointing/transferfunctions/NaiveConstantFunction.cpp src/pointing/transferfunctions/SigmoidFunction.cpp src/pointing/transferfunctions/TransferFunction.cpp src/pointing/transferfunctions/SubPixelFunction.cpp src/pointing/transferfunctions/Interpolation.cpp src/pointing/input/PointingDeviceManager.cpp src/pointing/input/SystemPointingDevice.cpp src/pointing/utils/osx/osxPlistUtils.cpp src/pointing/input/osx/osxPointingDevice.cpp src/pointing/input/osx/osxHIDUtils.cpp src/pointing/input/osx/osxPrivateMultitouchDevice.cpp src/pointing/input/osx/osxPointingDeviceManager.cpp src/pointing/output/osx/osxDisplayDevice.cpp src/pointing/output/osx/osxDisplayDeviceManager.cpp src/pointing/transferfunctions/osx/osxSystemPointerAcceleration.cpp src/pointing-xorg/transferfunctions/XorgFunction.cpp
 
-CXX      = g++ -stdlib=libc++
-CPPFLAGS = -Iinclude -DPOINTING_XORG
-CXXFLAGS = -mmacosx-version-min=10.7 -std=c++11
-LDFLAGS  = -Llib -F/System/Library/PrivateFrameworks -mmacosx-version-min=10.7
+CXX      ?= g++
+CPPFLAGS := -Iinclude -DPOINTING_XORG $(CPPFLAGS)
+CXXFLAGS := -std=c++11 $(CXXFLAGS)
+LDFLAGS  := -Llib -F/System/Library/PrivateFrameworks $(LDFLAGS)
 LIBS     = -framework MultitouchSupport -framework IOKit -framework CoreFoundation -framework ApplicationServices -framework AppKit
 
 OBJECTS = $(SOURCES:.cpp=.o)
@@ -19,7 +18,7 @@
 all: lib/$(LIBPOINTING)
 
 lib/$(LIBPOINTING): $(OBJECTS)
-	$(CXX) -shared -o $@ $^ $(LDFLAGS) $(LIBS)
+	$(CXX) -dynamiclib -install_name $(PREFIX)/lib/$(LIBPOINTING) -o $@ $^ $(LDFLAGS) $(LIBS)
 
 src/simpletest: src/simpletest.cpp
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS) -lpointing
@@ -31,12 +30,12 @@
 distclean: clean
 	rm -f lib/$(LIBPOINTING)
 install:
-	mkdir -p $(PREFIX)/include
-	cp -r include/pointing $(PREFIX)/include
-	cp -r include/pointing-xorg $(PREFIX)/include
-	cp -r include/pointing-echomouse $(PREFIX)/include
-	mkdir -p $(PREFIX)/lib
-	cp -r lib $(PREFIX)
+	mkdir -p $(DESTDIR)$(PREFIX)/include
+	cp -R include/pointing $(DESTDIR)$(PREFIX)/include
+	cp -R include/pointing-xorg $(DESTDIR)$(PREFIX)/include
+	cp -R include/pointing-echomouse $(DESTDIR)$(PREFIX)/include
+	mkdir -p $(DESTDIR)$(PREFIX)/lib
+	cp -R lib $(DESTDIR)$(PREFIX)
 uninstall:
 	rm -rf $(PREFIX)/include/pointing
 	rm -rf $(PREFIX)/include/pointing-xorg