Create separate renderer and framebuffer modules

build.sh

@@ -4,5 +4,8 @@ cc="gcc"
 warn="-std=c23 -pedantic -Wall -Wextra"
 opt="-O2 -march=native"
 libs="-I/usr/include/libdrm -ldrm"
+defs="-D_POSIX_C_SOURCE=200809L"
 
-$cc $flags $libs main.c -o asteroids
+$cc $flags $libs $defs \
+	-o asteroids \
+	fb.c main.c renderer.c