--- Makefile.orig	2016-11-02 14:44:56 UTC
+++ Makefile
@@ -39,7 +39,7 @@ PREFIX     ?= /usr
 DESTDIR    ?=
 BINPREFIX  ?= $(PREFIX)
 BINDIR     ?= ${BINPREFIX}/bin
-INSTALLDIR ?= ${PREFIX}/share/games/atanks
+INSTALLDIR ?= ${PREFIX}/share/atanks
 
 
 # ------------------------------------
@@ -232,7 +232,6 @@ ifeq (YES,$(DEBUG))
   endif
 
 else
-  CXXFLAGS := -march=native ${CXXFLAGS} -O2
 endif
 
 
@@ -255,7 +254,7 @@ DISTCOMMON := \
 atanks/*.dat atanks/COPYING atanks/README atanks/TODO \
 atanks/Changelog atanks/BUGS atanks/*.txt
 
-INCOMMON   := COPYING README TODO Changelog *.txt unicode.dat
+INCOMMON   := credits.txt unicode.dat
 
 # ------------------------------------
 # Default target
@@ -301,11 +300,11 @@ endif
 # ------------------------------------
 install: $(TARGET)
 	$(INSTALL) -d $(DESTDIR)${BINDIR}
-	$(INSTALL) -m 755 atanks $(DESTDIR)${BINDIR}
+	$(BSD_INSTALL_PROGRAM) atanks $(DESTDIR)${BINDIR}
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/share/applications
-	$(INSTALL) -m 644 atanks.desktop $(DESTDIR)$(PREFIX)/share/applications
+	$(BSD_INSTALL_DATA) atanks.desktop $(DESTDIR)$(PREFIX)/share/applications
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/share/icons/hicolor/48x48/apps
-	$(INSTALL) -m 644 atanks.png $(DESTDIR)$(PREFIX)/share/icons/hicolor/48x48/apps
+	$(BSD_INSTALL_DATA) atanks.png $(DESTDIR)$(PREFIX)/share/icons/hicolor/48x48/apps
 	$(INSTALL) -d $(DESTDIR)${INSTALLDIR}
 	$(INSTALL) -d $(DESTDIR)${INSTALLDIR}/button
 	$(INSTALL) -d $(DESTDIR)${INSTALLDIR}/misc
@@ -316,16 +315,16 @@ install: $(TARGET)
 	$(INSTALL) -d $(DESTDIR)${INSTALLDIR}/tankgun
 	$(INSTALL) -d $(DESTDIR)${INSTALLDIR}/title
 	$(INSTALL) -d $(DESTDIR)${INSTALLDIR}/text
-	$(INSTALL) -m 644 $(INCOMMON) $(DESTDIR)${INSTALLDIR}
-	$(INSTALL) -m 644 button/* $(DESTDIR)${INSTALLDIR}/button
-	$(INSTALL) -m 644 misc/* $(DESTDIR)${INSTALLDIR}/misc
-	$(INSTALL) -m 644 missile/* $(DESTDIR)${INSTALLDIR}/missile
-	$(INSTALL) -m 644 sound/* $(DESTDIR)${INSTALLDIR}/sound
-	$(INSTALL) -m 644 stock/* $(DESTDIR)${INSTALLDIR}/stock
-	$(INSTALL) -m 644 tank/* $(DESTDIR)${INSTALLDIR}/tank
-	$(INSTALL) -m 644 tankgun/* $(DESTDIR)${INSTALLDIR}/tankgun
-	$(INSTALL) -m 644 title/* $(DESTDIR)${INSTALLDIR}/title
-	$(INSTALL) -m 644 text/* $(DESTDIR)${INSTALLDIR}/text
+	$(BSD_INSTALL_DATA) -m 644 $(INCOMMON) $(DESTDIR)${INSTALLDIR}
+	$(BSD_INSTALL_DATA) -m 644 button/* $(DESTDIR)${INSTALLDIR}/button
+	$(BSD_INSTALL_DATA) -m 644 misc/* $(DESTDIR)${INSTALLDIR}/misc
+	$(BSD_INSTALL_DATA) -m 644 missile/* $(DESTDIR)${INSTALLDIR}/missile
+	$(BSD_INSTALL_DATA) -m 644 sound/* $(DESTDIR)${INSTALLDIR}/sound
+	$(BSD_INSTALL_DATA) -m 644 stock/* $(DESTDIR)${INSTALLDIR}/stock
+	$(BSD_INSTALL_DATA) -m 644 tank/* $(DESTDIR)${INSTALLDIR}/tank
+	$(BSD_INSTALL_DATA) -m 644 tankgun/* $(DESTDIR)${INSTALLDIR}/tankgun
+	$(BSD_INSTALL_DATA) -m 644 title/* $(DESTDIR)${INSTALLDIR}/title
+	$(BSD_INSTALL_DATA) -m 644 text/* $(DESTDIR)${INSTALLDIR}/text
 
 $(TARGET): $(MODULES)
 	$(LD) -o $@ $(MODULES) $(CPPFLAGS) $(LDFLAGS) $(CXXFLAGS)