--- libpng-1.6.29/Makefile.am.orig	2017-04-08 12:12:49.688261183 +0200
+++ libpng-1.6.29/Makefile.am	2017-04-08 12:13:27.148259514 +0200
@@ -12,13 +12,13 @@
 ACLOCAL_AMFLAGS = -I scripts
 
 # test programs - run on make check, make distcheck
-check_PROGRAMS= pngtest pngunknown pngstest pngvalid pngimage pngcp
+check_PROGRAMS=
 if HAVE_CLOCK_GETTIME
 check_PROGRAMS += timepng
 endif
 
 # Utilities - installed
-bin_PROGRAMS= pngfix png-fix-itxt
+bin_PROGRAMS=
 
 # This ensures that pnglibconf.h gets built at the start of 'make all' or
 # 'make check', but it does not add dependencies to the individual programs,