From 7dc1418e2b1826a7859393d4c0f08d2ece7808d5 Mon Sep 17 00:00:00 2001
From: unknown <skurmedel@gmail.com>
Date: Tue, 26 Apr 2016 19:42:42 +0200
Subject: [PATCH] viewer: Cleaned up Makefile and added a semblance of a
 Mingw64-target for Windows.

---
 examples/viewer/Makefile | 66 ++++++++++++++++++++++++++++++++++------
 1 file changed, 57 insertions(+), 9 deletions(-)

diff --git a/examples/viewer/Makefile b/examples/viewer/Makefile
index f06e3d0..d42278c 100644
--- a/examples/viewer/Makefile
+++ b/examples/viewer/Makefile
@@ -1,18 +1,66 @@
-GLFW_INC=-I/usr/local/include 
+CXX_FLAGS=-O0 -g -Wno-deprecated-declarations
 
+ifndef PLATFORM
 UNAME=$(shell uname -s)
 
+# OSX TEST
 ifeq ($(UNAME),Darwin)
-# OSX
-GLFW_LIBS=-L/usr/local/lib -lglfw3 -lGLEW
-GL_LIBS=-framework OpenGL
+PLATFORM=OSX
 else
-# Assume Linux
-GLFW_LIBS=-L/usr/local/lib -lglfw3 -lGLEW
-GL_LIBS=-lGL -lGLU -lX11 -lXrandr -lXi -lXxf86vm -lXcursor -lXinerama -ldl -pthread
+# WINDOWS MINGW TEST
+ifeq ($(findstring MINGW, $(UNAME)), MINGW)
+	PLATFORM=WINDOWS_MINGW
+else
+# ASSUME LINUX
+	PLATFORM=LINUX
+endif
 endif
 
-CXX_FLAGS=-Wno-deprecated-declarations
+endif
+$(info PLATFORM SELECTED:	$(PLATFORM))
+
+ifeq ($(PLATFORM),OSX)
+# OSX CONFIGURATION-------------------------------------------------------------
+CXX_FLAGS+= -fsanitize=address
+GLFW_INC=-I/usr/local/include 
+GLFW_LIB_DIR=/usr/local/lib
+GLFW_LIBS=-L$(GLFW_LIB_DIR) -lglfw3 -lGLEW
+GL_LIBS=-framework OpenGL
+# /OSX CONFIGURATION------------------------------------------------------------
+else
+ifeq ($(PLATFORM),LINUX)
+# LINUX CONFIGURATION-----------------------------------------------------------
+CXX_FLAGS+= -fsanitize=address
+GLFW_INC=-I/usr/local/include 
+GLFW_LIB_DIR=/usr/local/lib
+GLFW_LIBS=-L$(GLFW_LIB_DIR) -lglfw3 -lGLEW
+GL_LIBS=-lGL -lGLU -lX11 -lXrandr -lXi -lXxf86vm -lXcursor -lXinerama -ldl -pthread
+# /LINUX CONFIGURATION----------------------------------------------------------
+else
+ifeq ($(PLATFORM),WINDOWS_MINGW)
+# WINDOWS MINGW CONFIGURATION---------------------------------------------------
+# Since Windows unfortunately doesn't have any defacto directories for third 
+# party libraries, we'll have to force the user to give us them. So we check 
+# that the user passed in GLFW-dirs in some way, via flag or environ.
+ifndef GLFW_DIR
+$(error NO GLFW_DIR SPECIFIED. PASS GLFW_DIR=<dir> TO MAKE)
+endif 
+ifndef GLEW_DIR
+$(error NO GLEW_DIR SPECIFIED. PASS GLEW_DIR=<dir> TO MAKE)
+endif
+GLFW_INC=-I$(GLFW_DIR)/include
+GLFW_LIB_DIR=$(GLFW_DIR)/lib-mingw-w64
+GLFW_LIBS= -lglfw3 -L$(GLFW_LIB_DIR)
+GL_LIBS=   -lglew32 -lopengl32 -lglu32 -lgdi32 -I$(GLEW_DIR)/include -L$(GLEW_DIR)/bin/Release/x64
+# /WINDOWS CONFIGURATION--------------------------------------------------------
+else
+$(error UNKNOWN PLATFORM "$(PLATFORM)")
+endif #ifeq ($(PLATFORM),WINDOWS_MINGW)
+endif #ifeq ($(PLATFORM),LINUX)
+endif #ifeq ($(PLATFORM),OSX)
 
 all:
-	g++ -fsanitize=address -O0 -g -o objviewer $(CXX_FLAGS) viewer.cc ../../tiny_obj_loader.cc trackball.cc $(GLFW_INC) $(GL_LIBS) $(GLFW_LIBS)
+	g++ -o objviewer $(CXX_FLAGS) viewer.cc ../../tiny_obj_loader.cc trackball.cc $(GLFW_INC)  $(GLFW_LIBS) $(GL_LIBS)
+ifeq ($(PLATFORM), WINDOWS_MINGW)
+	cp $(GLEW_DIR)/bin/Release/x64/glew32.dll .
+endif