add gl4d support

Makefile

@@ -1,6 +1,7 @@
 CC      = gcc
-CFLAGS  = -std=c11
+CFLAGS  = -std=c11 -I. -I/usr/include/SDL2
 RM      = rm
+LDFLAGS = -lm -lGL -lGL4Dummies -lSDL2
 
 SOURCES = $(wildcard src/*.c)
 OBJECTS = $(patsubst %.c,%.c.o,$(notdir $(SOURCES)))
@@ -13,11 +14,12 @@ EXE     = othello
 main: CFLAGS += -O3
 main: compilation
 
-dev: CFLAGS += -Wall -Wextra -Wshadow -Wcast-align -Wstrict-prototypes -fanalyzer -fsanitize=undefined -pedantic -g
+dev: CFLAGS += -Wall -Wextra -Wshadow -Wcast-align -Wstrict-prototypes
+dev: CFLAGS += -fanalyzer -fsanitize=undefined -pedantic -g
 dev: compilation
 
 compilation: $(OBJECTS)
-	$(CC) -o $(EXE) $(OBJECTS)
+	$(CC) -o $(EXE) $(OBJECTS) $(LDFLAGS)
 
 all:
 	main

compile_flags.txt

@@ -0,0 +1 @@
+-I/usr/include/SDL2

src/main.c

@@ -1 +1,29 @@
-int main(void) {}
+#include <GL4D/gl4dp.h>
+#include <GL4D/gl4duw_SDL2.h>
+#include <SDL2/SDL_video.h>
+
+static void dessin(void);
+static void job(void);
+
+int main(int argc, char **argv) {
+
+    if (!gl4duwCreateWindow(argc, argv, "GL4Dummies' Hello World", 10, 10, 320,
+                            240, GL4DW_SHOWN)) {
+        return 1;
+    }
+
+    gl4dpInitScreen();
+
+    gl4duwDisplayFunc(dessin);
+
+    gl4duwMainLoop();
+    return 0;
+}
+
+void dessin(void) {
+    gl4dpClearScreen();
+    job();
+    gl4dpUpdateScreen(NULL);
+}
+
+void job(void) {}