$OpenBSD: patch-Makefile,v 1.12 2016/12/12 10:54:39 sthen Exp $
--- Makefile.orig	2022-10-30 12:16:03 UTC
+++ Makefile
@@ -257,17 +257,19 @@ $(THIRD_GLUT_LIB) : $(THIRD_GLUT_OBJ)
 $(THREAD_LIB) : $(THREAD_OBJ)
 $(PKCS7_LIB) : $(PKCS7_OBJ)
 else
-MUPDF_LIB = $(OUT)/libmupdf.a
+MUPDF_LIB = $(OUT)/libmupdf.so.$(SOVERSION)
+THIRD_LIB = $(OUT)/libmupdf-third.so.$(SOVERSION)
 LIBS_TO_INSTALL_IN_LIB = $(MUPDF_LIB) $(THIRD_LIB)
-THIRD_LIB = $(OUT)/libmupdf-third.a
 ifneq ($(USE_SYSTEM_GLUT),yes)
 THIRD_GLUT_LIB = $(OUT)/libmupdf-glut.a
 endif
 THREAD_LIB = $(OUT)/libmupdf-threads.a
 PKCS7_LIB = $(OUT)/libmupdf-pkcs7.a
 
-$(MUPDF_LIB) : $(MUPDF_OBJ)
+$(MUPDF_LIB) : $(MUPDF_OBJ) $(THIRD_LIB)
+	$(LINK_CMD) -shared -Wl,-soname -Wl,libmupdf.so.$(SOVERSION)
 $(THIRD_LIB) : $(THIRD_OBJ)
+	$(LINK_CMD) -shared -Wl,-soname -Wl,libmupdf-third.so.$(SOVERSION)
 $(THIRD_GLUT_LIB) : $(THIRD_GLUT_OBJ)
 $(THREAD_LIB) : $(THREAD_OBJ)
 $(PKCS7_LIB) : $(PKCS7_OBJ)