File reproducible.patch of Package xgalaga++

Index: xgalaga++-0.8.4/Makefile
===================================================================
--- xgalaga++-0.8.4.orig/Makefile
+++ xgalaga++-0.8.4/Makefile
@@ -124,7 +124,7 @@ CXXOPTS = $(GOAL_OPTS) $(COMPILE_OPTS) $
 LDOPTS = $(GOAL_OPTS) $(LNK_LIBS)
 
 # source files in this project
-sources := $(wildcard $(srcdir)/*.$(SOURCE_SUFFIX))
+sources := $(sort $(wildcard $(srcdir)/*.$(SOURCE_SUFFIX)))
 
 # object files in this project
 objs := $(notdir $(sources))