--- src/Makefile.orig	2013-06-18 12:49:36 UTC
+++ src/Makefile
@@ -1,9 +1,10 @@
-LIBRARIES = libb64.a
+LIBRARIES = libb64.a libb64.so
+SOVERSION ?= 0
 
 # Build flags (uncomment one)
 #############################
 # Release build flags
-CFLAGS += -O3
+#CFLAGS += -O3
 #############################
 # Debug build flags
 #CFLAGS += -g
@@ -15,7 +16,7 @@ TARGETS = $(LIBRARIES)
 
 LINK.o = gcc
 
-CFLAGS += -Werror -pedantic
+CFLAGS += -Werror -pedantic -fsigned-char
 CFLAGS += -I../include
 
 vpath %.h ../include/b64
@@ -27,6 +28,15 @@ all: $(TARGETS) #strip
 libb64.a: cencode.o cdecode.o
 	$(AR) $(ARFLAGS) $@ $^
 
+libb64.so.$(SOVERSION): cencode.So cdecode.So
+	$(CC) $(CFLAGS) $(LDFLAGS) -shared -Wl,-soname,$@ -o $@ $^
+
+%.So: %.c
+	$(CC) -fPIC -c $(CFLAGS) $(CPPFLAGS) $< -o $@
+
+%.so: %.so.$(SOVERSION)
+	ln -fs $< $@
+
 strip:
 	strip $(BINARIES) *.exe