6 files changed, 46 insertions, 6 deletions
diff --git a/.gitignore b/.gitignore
index baa5218..bf35bd2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 *.so
 *.su
 *.lo
+*.dll
+*.dylib
diff --git a/Makefile b/Makefile
index 4b61012..72f191b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,20 @@
 .POSIX:
 
+LIB_MAJOR = 1
+LIB_MINOR = 0
+LIB_VERSION = $(LIB_MAJOR).$(LIB_MINOR)
+
+
 CONFIGFILE = config.mk
 include $(CONFIGFILE)
 
+OS = linux
+# Linux:   linux
+# Mac OS:  macos
+# Windows: windows
+include mk/$(OS).mk
+
+
 
 OBJ =\
 	libcontacts_address_destroy.o\
@@ -28,31 +40,46 @@ HDR =\
 	common.h\
 	libcontacts.h
 
+LOBJ = $(OBJ:.o=.lo)
 
-all: libcontacts.a
+
+all: libcontacts.a libcontacts.$(LIBEXT)
 $(OBJ): $($@:.o=.c) $(HDR)
 
 libcontacts.a: $(OBJ)
+	-rm -f -- $@
 	$(AR) rc $@ $(OBJ)
 	$(AR) -s $@
 
+libcontacts.$(LIBEXT): $(LOBJ)
+	$(CC) $(LIBFLAGS) $(LDFLAGS_METHODS) -o $@ $(LOBJ) $(LDFLAGS)
+
 .c.o:
 	$(CC) -c -o $@ $< $(CFLAGS) $(CPPFLAGS)
 
-install: libcontacts.a
+.c.lo:
+	$(CC) -fPIC -c -o $@ $< $(CFLAGS) $(CPPFLAGS)
+
+install: libcontacts.a libcontacts.$(LIBEXT)
 	mkdir -p -- "$(DESTDIR)$(PREFIX)/lib"
 	mkdir -p -- "$(DESTDIR)$(PREFIX)/include"
 	cp -- libcontacts.a "$(DESTDIR)$(PREFIX)/lib/"
 	cp -- libcontacts.h "$(DESTDIR)$(PREFIX)/include/"
+	cp -- libcontacts.$(LIBEXT) "$(DESTDIR)$(PREFIX)/lib/libcontacts.$(LIBMINOREXT)"
+	ln -sf -- libcontacts.$(LIBMINOREXT) "$(DESTDIR)$(PREFIX)/lib/libcontacts.$(LIBMAJOREXT)"
+	ln -sf -- libcontacts.$(LIBMAJOREXT) "$(DESTDIR)$(PREFIX)/lib/libcontacts.$(LIBEXT)"
 
 uninstall:
+	-rm -f -- "$(DESTDIR)$(PREFIX)/lib/libcontacts.$(LIBMAJOREXT)"
+	-rm -f -- "$(DESTDIR)$(PREFIX)/lib/libcontacts.$(LIBMINOREXT)"
+	-rm -f -- "$(DESTDIR)$(PREFIX)/lib/libcontacts.$(LIBEXT)"
 	-rm -f -- "$(DESTDIR)$(PREFIX)/lib/libcontacts.a"
 	-rm -f -- "$(DESTDIR)$(PREFIX)/include/libcontacts.h"
 
 clean:
-	-rm -f -- *.o *.a *.lo *.so *.su
+	-rm -f -- *.o *.a *.lo *.so *.dylib *.dll *.su
 
 .SUFFIXES:
-.SUFFIXES: .c .o
+.SUFFIXES: .c .o .lo
 
 .PHONY: all install uninstall clean
diff --git a/TODO b/TODO
index aadad29..87edc04 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,4 @@
-Add dynamically linked library
+Add support for different calendars
 Add man pages
 Add readme
 Add tests
-Add handle different calendars
diff --git a/mk/linux.mk b/mk/linux.mk
new file mode 100644
index 0000000..e248fc9
--- /dev/null
+++ b/mk/linux.mk
@@ -0,0 +1,4 @@
+LIBEXT      = so
+LIBFLAGS    = -shared -Wl,-soname,libcontacts.$(LIBEXT).$(LIB_MAJOR)
+LIBMAJOREXT = $(LIBEXT).$(LIB_MAJOR)
+LIBMINOREXT = $(LIBEXT).$(LIB_VERSION)
diff --git a/mk/macos.mk b/mk/macos.mk
new file mode 100644
index 0000000..bd92de6
--- /dev/null
+++ b/mk/macos.mk
@@ -0,0 +1,4 @@
+LIBEXT      = dylib
+LIBFLAGS    = -dynamiclib
+LIBMAJOREXT = $(LIB_MAJOR).$(LIBEXT)
+LIBMINOREXT = $(LIB_VERSION).$(LIBEXT)
diff --git a/mk/windows.mk b/mk/windows.mk
new file mode 100644
index 0000000..e9602e1
--- /dev/null
+++ b/mk/windows.mk
@@ -0,0 +1,4 @@
+LIBEXT      = dll
+LIBFLAGS    = -mdll
+LIBMAJOREXT = $(LIB_MAJOR).$(LIBEXT)
+LIBMINOREXT = $(LIB_VERSION).$(LIBEXT)