--- zbar-0.21/python/Makefile.am.inc.orig	2019-02-20 13:54:40.605279400 +0300
+++ zbar-0.21/python/Makefile.am.inc	2019-02-20 13:54:56.782507800 +0300
@@ -1,6 +1,6 @@
 pyexec_LTLIBRARIES += python/zbar.la
 python_zbar_la_CPPFLAGS = $(PYTHON_CFLAGS) $(AM_CPPFLAGS)
-python_zbar_la_LDFLAGS = -shared -module -avoid-version -export-dynamic \
+python_zbar_la_LDFLAGS = -no-undefined -shared -module -avoid-version -export-dynamic \
     -export-symbols-regex '(initzbar|PyInit_zbar)'
 python_zbar_la_LIBADD = $(PYTHON_LIBS) zbar/libzbar.la $(AM_LIBADD)