re-add ar, add windows Makefile

src/Makevars

@@ -1,7 +1,7 @@
 
 PKG_CXXFLAGS= -I"../inst/include" -I"./n2/include" $(SHLIB_OPENMP_CXXFLAGS)
 
-PKG_LIBS=-L/usr/lib/ -L"." -lpthread -lstdc++ -ln2 -lm `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) $(SHLIB_OPENMP_CXXFLAGS) 
+PKG_LIBS = -L/usr/lib/ -L"." -lpthread -lstdc++ -ln2 -lm `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) $(SHLIB_OPENMP_CXXFLAGS) 
 CXX_STD = CXX11
 MkInclude = $(R_HOME)/etc${R_ARCH}/Makeconf
 

src/n2/Makefile

@@ -1,13 +1,13 @@
 CXX ?= g++
-PKG_CXXFLAGS = -O3 -std=c++11 -pthread -fPIC $(SHLIB_OPENMP_CXXFLAGS)
+PKG_CXXFLAGS = -O3 -std=c++11 -pthread -fPIC -I"./include" $(SHLIB_OPENMP_CXXFLAGS)
 PKG_CXXFLAGS += -I"./include"
 LDFLAGS += -lpthread
 
 LIB = ../libn2.a
 lib: $(LIB)
 
 $(LIB): base.o hnsw.o hnsw_node.o distance.o heuristic.o mmap.o
-
+	ar rvs $@ $?
 
 clean:
 	@-rm -f *.o $(LIB) 

src/n2/Makefile.win

@@ -0,0 +1,14 @@
+CXX ?= g++
+PKG_CXXFLAGS = -O3 -std=c++11 -pthread -fPIC -I"./include" $(SHLIB_OPENMP_CXXFLAGS)
+PKG_CXXFLAGS += -I"./include"
+LDFLAGS += -lpthread
+
+LIB = ../libn2.a
+lib: $(LIB)
+
+$(LIB): base.o hnsw.o hnsw_node.o distance.o heuristic.o mmap.o
+
+clean:
+	@-rm -f *.o $(LIB) 
+
+