add orig_prog_diff and alt_prog_diff rules to Makefiles

1984/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1984/anonymous/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1984/decot/Makefile

@@ -129,9 +129,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -155,6 +155,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1984/laman/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this entry will likely crash or do something else without an arg."
@@ -147,6 +147,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1984/mullender/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: This entry is likely to fail and/or dump core on any computer other"
@@ -154,6 +154,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1985/Makefile

@@ -61,39 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
-
-# alternative executable
-#
-alt:
-	@echo '=-=-= ${YEAR} begin make $@ =-=-='
-	@echo
-	@for i in ${WINNERS} ; do \
-	    echo "=-= start ${YEAR}/$$i =-="; \
-	    echo "(cd $$i && $(MAKE) $@)"; \
-	    (cd $$i && $(MAKE) $@); \
-	    echo "=-= end ${YEAR}/$$i =-="; \
-	    echo; \
-	done
-	@echo '=-=-= ${YEAR} complete make $@ =-=-='
-
-# data files
-#
-data:
-	@echo '=-=-= ${YEAR} begin make $@ =-=-='
-	@echo
-	@for i in ${WINNERS} ; do \
-	    echo "=-= start ${YEAR}/$$i =-="; \
-	    echo "(cd $$i && $(MAKE) $@)"; \
-	    (cd $$i && $(MAKE) $@); \
-	    echo "=-= end ${YEAR}/$$i =-="; \
-	    echo; \
-	done
-	@echo '=-=-= ${YEAR} complete make $@ =-=-='
-
-# both all and alt
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 #
 everything:
 	@echo '=-=-= ${YEAR} begin make $@ =-=-='
@@ -107,6 +77,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1985/applin/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1985/august/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1985/lycklama/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1985/shapiro/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1985/sicherman/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1986/applin/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -147,6 +147,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/august/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this entry is very likely to dump core after its output."
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/bright/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/hague/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this entry uses gets() so you might get a warning about this"
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/holloway/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -147,6 +147,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/marshall/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/pawka/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/stein/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1986/wall/Makefile

@@ -128,9 +128,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1987/biggar/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} -DC="R>0" -DI="if(T)O" -DO="c=write(1,&c,1);" \
@@ -147,6 +147,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/heckbert/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/hines/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/korn/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/lievaart/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET= ${PROG}.alt ${PROG}2.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -158,6 +158,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/wall/Makefile

@@ -138,9 +138,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -160,6 +160,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1987/westley/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1988/applin/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET= applin.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # Way back in 1988 ..
 #
@@ -170,6 +170,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/dale/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/isaak/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -152,6 +152,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/litmaath/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/phillipps/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/reddy/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/robison/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/spinellis/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c input.txt
 	@echo "NOTE: this entry will not compile with some compilers like clang."
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1988/westley/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1989/fubar/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${RM} -f $@
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/jar.1/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo NOTE: this compilation results in running the program itself.
@@ -155,6 +155,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/jar.2/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo NOTE: invalid input will cause this entry to dump core.
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/ovdluhe/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -152,6 +152,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/paul/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -147,6 +147,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/robison/Makefile

@@ -128,9 +128,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this entry will crash with numbers with non binary digits."
@@ -151,6 +151,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/roemer/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -147,6 +147,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/tromp/Makefile

@@ -133,9 +133,9 @@ CINCLUDE+= -include stdio.h -include unistd.h -include stdlib.h
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -158,6 +158,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/vanb/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1989/westley/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET= ver0 ver1 ver2 ver3
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: This entry uses non-standard args to main() that do not work with some modern compilers."
@@ -168,6 +168,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1990/baruch/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/cmills/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/dds/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/dg/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/jaw/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 zcat: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -158,6 +158,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/pjr/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/scjones/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/stig/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "source ./stig.sh ; source ./stig.c" | ${SH}
@@ -144,6 +144,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/tbr/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -151,6 +151,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/theorem/Makefile

@@ -129,9 +129,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -170,6 +170,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1990/westley/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this will very likely crash without an arg and will enter an infinite loop"
@@ -151,6 +151,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1991/ant/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/brnstnd/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/buzzard/Makefile

@@ -127,9 +127,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -149,6 +149,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/cdupont/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -144,6 +144,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/davidguy/Makefile

@@ -128,9 +128,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/dds/Makefile

@@ -125,9 +125,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/fine/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/rince/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1991/westley/Makefile

@@ -128,9 +128,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -199,6 +199,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/Makefile

@@ -62,9 +62,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -108,6 +108,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1992/adrian/Makefile

@@ -131,9 +131,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -193,6 +193,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/albert/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/ant/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	am am_clobber \
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/buzzard.1/Makefile

@@ -128,9 +128,9 @@ CPPCLEAN= ${GREP} -v '^. [0-9][0-9]*'
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -179,6 +179,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/buzzard.2/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/gson/Makefile

@@ -128,9 +128,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -154,6 +154,18 @@ data: ${DATA}
 everything: all alt
 
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 ###############
 # utility rules
 ###############

1992/imc/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/kivinen/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/lush/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/marangon/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/nathan/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -144,6 +144,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/vern/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.tmp.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1992/westley/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: your terminal must wrap at 80 columns for this to work right!"
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/Makefile

@@ -62,9 +62,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -108,6 +108,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1993/ant/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -154,6 +154,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/cmills/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/dgibson/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	-@if [ ! -f life.d ] ; then \
@@ -155,6 +155,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/ejb/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/jonth/Makefile

@@ -130,9 +130,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.tmp.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -155,6 +155,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/leo/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET= mind
 all: data ${TARGET} ${ALT_TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/lmfjyh/Makefile

@@ -122,9 +122,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: This will not compile when using modern compilers because"
@@ -153,6 +153,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/plummer/Makefile

@@ -124,9 +124,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this program will likely crash or do something else without enough args."
@@ -150,6 +150,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/rince/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET= ${PROG}.alt
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -152,6 +152,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/schnitzi/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	@echo "NOTE: this entry will segfault if the file cannot be opened."
@@ -146,6 +146,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1993/vanb/Makefile

@@ -123,9 +123,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -145,6 +145,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules

1994/Makefile

@@ -61,9 +61,9 @@ all:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
-.PHONY: all alt data everything clean clobber install \
-        love haste waste maker easter_egg sandwich \
-        supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 # alternative executable
 #
@@ -107,6 +107,34 @@ everything:
 	done
 	@echo '=-=-= ${YEAR} complete make $@ =-=-='
 
+# diff orig source and source
+#
+orig_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
+# diff alt source and source
+#
+alt_prog_diff:
+	@echo '=-=-= ${YEAR} begin make $@ =-=-='
+	@echo
+	@for i in ${WINNERS} ; do \
+	    echo "=-= start ${YEAR}/$$i =-="; \
+	    echo "(cd $$i && $(MAKE) $@)"; \
+	    (cd $$i && $(MAKE) $@); \
+	    echo "=-= end ${YEAR}/$$i =-="; \
+	    echo; \
+	done
+	@echo '=-=-= ${YEAR} complete make $@ =-=-='
+
 
 ###############
 # utility rules

1994/dodsond1/Makefile

@@ -126,9 +126,9 @@ ALT_TARGET=
 all: data ${TARGET}
 	@${TRUE}
 
-.PHONY: all alt data everything clean clobber install \
-	love haste waste maker easter_egg sandwich \
-	supernova deep_magic magic charon pluto
+.PHONY: all alt data everything orig_prog_diff alt_prog_diff \
+	clean clobber install love haste waste maker easter_egg \
+	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
@@ -148,6 +148,18 @@ data: ${DATA}
 everything: all alt
 	@${TRUE}
 
+# diff orig source and source
+#
+orig_prog_diff: ${PROG}.orig.c ${PROG}.c
+	@-${DIFF} -u ${PROG}.orig.c ${PROG}.c
+
+# diff alt source and source
+#
+alt_prog_diff: ${PROG}.c
+	@-if [[ -e ${PROG}.alt.c ]]; then \
+	    ${DIFF} -u ${PROG}.alt.c ${PROG}.c; \
+	fi
+
 
 ###############
 # utility rules