added possibility to generate gitignore file. a bit ugly

source_codes/recursivity/.gitignore

+rec_fibonacci
+rec_reines
+lissage
+rec_factorielle
+rec_pgcd
+rec_binary
+rec_reines_skel
+rec_ppcm
+rec_puissance_indienne

source_codes/recursivity/Makefile

@@ -8,11 +8,11 @@ EXECS := $(shell find . -type f -iname '*.c' | sed 's/\.c//g')
 all: $(EXECS)
 
 $(EXECS): %: %.c
-	# @echo $<
 	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+	@echo $@ >> .gitignore
 
-.PHONY: clean
+.PHONY: clean all
 
 clean:
-	rm -f *.o $(EXECS)
+	rm -f *.o $(EXECS) .gitignore