Update for glui library pkgconfig

--- makefile.old    2015-02-18 14:22:07.660757736 +0100
+++ makefile    2015-02-18 14:53:37.170739910 +0100
@@ -5,15 +5,15 @@
 #CC=gcc

 # Compiler options
-OPTS=-g
-OPTS=-O0
+#OPTS=-g
+#OPTS=-O0
 #OPTS=-O2

 UNAME = $(shell uname)

 ifeq ($(UNAME), Linux)
 CXX       = g++
-CPPFLAGS += $(OPTS) -Wall -pedantic
+CPPFLAGS += $(OPTS) -Wall -pedantic $(CFLAGS) -fpic
 endif

 #######################################
@@ -44,13 +44,15 @@

 GLUI_LIB = lib/libglui.a

+GLUI_LIB_SHARED = lib/libglui.so.2
+
 GLUI_EXAMPLES = bin/example1 bin/example2 bin/example3 bin/example4 bin/example5 bin/example6

 GLUI_TOOLS = bin/ppm2array

 .PHONY: all setup examples tools clean depend doc doc-pdf doc-dist dist

-all: setup $(GLUI_LIB) examples tools
+all: setup $(GLUI_LIB) $(GLUI_LIB_SHARED) examples tools

 setup:
    mkdir -p bin
@@ -69,6 +71,8 @@
 $(GLUI_LIB): $(GLUI_OBJS)
    ar -r $(GLUI_LIB) $(GLUI_OBJS)

+$(GLUI_LIB_SHARED): $(GLUI_OBJS)
+   $(CXX) -shared -o $@ $^
 .cpp.o:
    $(CXX) $(CPPFLAGS) -c $<