Modified makefile flags for examples on macOS Monterey ARM Homebrew

[baconpaul]

Hi!

I have a macOS monterey system on an M1 with home-brew.

In order to build the examples, I needed to brew install glew and glfw and then make the following modification

diff --git a/example/Makefile b/example/Makefile
index 1f24aea..d440791 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -11,8 +11,8 @@ else
        UNAME_S := $(shell uname -s)
        GLFW3 := $(shell pkg-config --libs glfw3)
        ifeq ($(UNAME_S),Darwin)
-               LIBS := $(GLFW3) -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo -lm -lGLEW -L/usr/local/lib
-               CFLAGS += -I/usr/local/include
+               LIBS := $(GLFW3) -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo -lm $(shell pkg-config --libs glew)
+               CFLAGS += $(shell pkg-config --cflags glfw3) $(shell pkg-config --cflags glew)
        else
                LIBS := $(GLFW3) -lGL -lm -lGLU -lGLEW
        endif

I'm not sure of your workflow. Would you prefer I submit this observation as an issue here or as a pull request? As you can see all I did was move glew to using pkg-config also on darwin.

Thanks!