--- mupdf-1.12.0-source.orig/Makefile	2017-12-13 15:00:30.000000000 +0100
+++ mupdf-1.12.0-source/Makefile	2017-12-31 00:05:23.003277481 +0100
@@ -14,7 +14,7 @@
 # Do not specify CFLAGS or LIBS on the make invocation line - specify
 # XCFLAGS or XLIBS instead. Make ignores any lines in the makefile that
 # set a variable that was set on the command line.
-CFLAGS += $(XCFLAGS) -Iinclude
+CFLAGS += $(XCFLAGS) -Iinclude -fPIC
 LIBS += $(XLIBS) -lm
 
 LIBS += $(FREETYPE_LIBS)
@@ -312,9 +312,9 @@
 
 # --- Library ---
 
-MUPDF_LIB = $(OUT)/libmupdf.a
-THIRD_LIB = $(OUT)/libmupdfthird.a
-THREAD_LIB = $(OUT)/libmuthreads.a
+MUPDF_LIB = $(OUT)/libmupdf.so
+THIRD_LIB = $(OUT)/libmupdfthird.so
+THREAD_LIB = $(OUT)/libmuthreads.so
 
 MUPDF_OBJ := \
 	$(FITZ_OBJ) \
@@ -343,11 +343,14 @@
 
 THREAD_OBJ := $(THREAD_OBJ)
 
-$(MUPDF_LIB) : $(MUPDF_OBJ)
+$(MUPDF_LIB) : $(MUPDF_OBJ) $(THIRD_LIB) $(THREAD_LIB)
+	$(LINK_CMD) -shared -Wl,-soname -Wl,libmupdf.so -Wl,--no-undefined
 $(THIRD_LIB) : $(THIRD_OBJ)
+	$(LINK_CMD) -shared -Wl,-soname -Wl,libmupdfthird.so -Wl,--no-undefined
 $(THREAD_LIB) : $(THREAD_OBJ)
+	$(LINK_CMD) -shared -Wl,-soname -Wl,libmuthreads.so -Wl,--no-undefined -lpthread
 
-INSTALL_LIBS := $(MUPDF_LIB) $(THIRD_LIB)
+INSTALL_LIBS := $(MUPDF_LIB) $(THIRD_LIB) $(THREAD_LIB)
 
 # --- Tools and Apps ---