Makefile modified to support OSX via make OSX=OSX

git-svn-id: file:///svn/tokudb@440 c7de825b-a66e-492c-adef-691d508d4ae1

src/Makefile

+# On OSX do:
+#   make OSX=OSX
+
 CFLAGS = -W -Wall -Wno-unused -g -fPIC -O2
 CPPFLAGS = -I../include -I../newbrt
 
-install: libdb.so
-	cp libdb.so ../lib/
+
+ifeq ($(OSX),OSX)
+LIBEXT=dylib
+SHARED=-dynamiclib
+CFLAGS+=-fno-common
+else
+LIBEXT=so
+SHARED=-shared
+endif
+
+LIBNAME=libdb.$(LIBEXT)
+
+install: $(LIBNAME)
+	cp $(LIBNAME) ../lib/
 
 clean:
-	rm -rf *.so *.o
+	rm -rf *.$(LIBEXT) *.o
 ydb.o: ../include/db.h ../newbrt/cachetable.h ../newbrt/brt.h
 DBBINS = ydb.o ../newbrt/brt.o ../newbrt/brt-serialize.o ../newbrt/cachetable.o ../newbrt/hashtable.o ../newbrt/header-io.o ../newbrt/key.o ../newbrt/memory.o ../newbrt/pma.o ../newbrt/ybt.o ../newbrt/primes.o ../newbrt/log.o
-libdb.so: $(DBBINS)
-	cc  $(CPPFLAGS) $(DBBINS) -shared -o libdb.so $(CFLAGS)
+$(LIBNAME): $(DBBINS)
+	cc  $(CPPFLAGS) $(DBBINS) $(SHARED) -o $@ $(CFLAGS)
 libdb.a(ydb.o): ydb.o