$NetBSD: patch-Makefile,v 1.2 2016/01/28 11:34:48 jperkin Exp $

Use LIBTOOL.

--- Makefile.orig	2015-09-26 22:03:26.000000000 +0000
+++ Makefile
@@ -1,34 +1,27 @@
 CXX ?= g++
 CC ?= gcc
-CFLAGS = -Wall -Wconversion -O3 -fPIC
-LIBS = blas/blas.a
+LIBS = blas/libblas.la
 SHVER = 3
-OS = $(shell uname)
 #LIBS = -lblas
 
 all: train predict
 
-lib: linear.o tron.o blas/blas.a
-	if [ "$(OS)" = "Darwin" ]; then \
-		SHARED_LIB_FLAG="-dynamiclib -Wl,-install_name,liblinear.so.$(SHVER)"; \
-	else \
-		SHARED_LIB_FLAG="-shared -Wl,-soname,liblinear.so.$(SHVER)"; \
-	fi; \
-	$(CXX) $${SHARED_LIB_FLAG} linear.o tron.o blas/blas.a -o liblinear.so.$(SHVER)
-
-train: tron.o linear.o train.c blas/blas.a
-	$(CXX) $(CFLAGS) -o train train.c tron.o linear.o $(LIBS)
-
-predict: tron.o linear.o predict.c blas/blas.a
-	$(CXX) $(CFLAGS) -o predict predict.c tron.o linear.o $(LIBS)
+lib: linear.lo tron.lo $(LIBS)
+	${LIBTOOL} --mode=link $(CXX) -o liblinear.la $> -rpath ${PREFIX}/lib -version-info ${SHVER}:0
 
-tron.o: tron.cpp tron.h
-	$(CXX) $(CFLAGS) -c -o tron.o tron.cpp
+train: tron.lo linear.lo train.c $(LIBS)
+	${LIBTOOL} --mode=link $(CXX) $(CFLAGS) -o train $>
 
-linear.o: linear.cpp linear.h
-	$(CXX) $(CFLAGS) -c -o linear.o linear.cpp
+predict: tron.lo linear.lo predict.c $(LIBS)
+	${LIBTOOL} --mode=link $(CXX) $(CFLAGS) -o predict $>
 
-blas/blas.a: blas/*.c blas/*.h
+tron.lo: tron.cpp tron.h
+	${LIBTOOL} --mode=compile $(CXX) $(CFLAGS) -c -o tron.o tron.cpp
+
+linear.lo: linear.cpp linear.h
+	${LIBTOOL} --mode=compile $(CXX) $(CFLAGS) -c -o linear.o linear.cpp
+
+$(LIBS): blas/*.c blas/*.h
 	make -C blas OPTFLAGS='$(CFLAGS)' CC='$(CC)';
 
 clean: