update makefile to put binary in "bin/"

Makefile

@@ -5,7 +5,8 @@ CXXFLAGS = -std=c++11 -g -ggdb3 -Wall -Isrc/ -I/usr/include/SDL2
 LDFLAGS = -lSDL2 -lGLEW -lGL
 OBJDIR = build
 SRCDIR = src
-BIN = shader_testing
+BINDIR = bin
+BIN = $(BINDIR)/shader_testing
 
 
 SOURCES = $(wildcard $(SRCDIR)/*.cpp)
@@ -26,6 +27,7 @@ $(NDBG_OBJS): $(OBJDIR)/%.o : $(SRCDIR)/%.cc
 	$(CXX) -std=c++11 -Wall -Isrc/ -c $< -o $@
 
 $(BIN): $(OBJECTS) $(NDBG_OBJS)
+	mkdir -p $(BINDIR)
 	$(CXX) -o $@ $(LDFLAGS) $^
 
 clean:

src/main.cpp

@@ -577,8 +577,8 @@ main()
 
 		if (!addShaderProgram(arena,
 				rs->gl_ctx,
-				"data/shader.vert",
+				"../data/shader.vert",
-				"data/shader.frag",
+				"../data/shader.frag",
 				"default"))
 		{
 			std::cout << "error loading shader program\n";