diff --git a/.gitignore b/.gitignore
index f811974..171ac41 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,3 @@ demo
 
 # Documentation
 documentation/*/
-
-# GL4D sources
-GL4Dummies/
diff --git a/Makefile b/Makefile
index 627eee2..715eefe 100644
--- a/Makefile
+++ b/Makefile
@@ -60,6 +60,9 @@ all: $(PROGNAME)
 $(PROGNAME): $(OBJ)
 	$(CC) $(OBJ) $(LDFLAGS) -o $(PROGNAME)
 
+debug: CFLAGS = -Wall -Wextra -Wconversion -Wdouble-promotion -Wshadow -Wcast-align -Wstrict-prototypes -fanalyzer -fsanitize=undefined -fsanitize-undefined-trap-on-error -g3
+debug: $(PROGNAME)
+
 %.o: %.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@