use premake to generate build config; removed unsupported code

premake5.lua

@@ -0,0 +1,61 @@
+workspace "librw"
+	location "build"
+	language "C++"
+
+	configurations { "Release", "Debug" }
+	filter { "system:windows" }
+		configurations { "ReleaseStatic" }
+		platforms { "win-x86-null", "win-x86-gl3", "win-x86-d3d9",
+			"win-amd64-null", "win-amd64-gl3", "win-amd64-d3d9" }
+	filter { "system:linux" }
+		platforms { "linux-x86-null", "linux-x86-gl3",
+		"linux-amd64-null", "linux-amd64-gl3" }
+	-- TODO: ps2
+	filter {}
+
+	filter "configurations:Debug"
+		defines { "DEBUG" }
+		symbols "On"
+	filter "configurations:Release*"
+		defines { "NDEBUG" }
+		optimize "On"
+	filter "configurations:ReleaseStatic"
+		flags { "StaticRuntime" }
+
+	filter { "platforms:*null" }
+		defines { "RW_NULL" }
+	filter { "platforms:*gl3" }
+		defines { "RW_GL3" }
+	filter { "platforms:*d3d9" }
+		defines { "RW_D3D9" }
+	filter { "platforms:*ps2" }
+		defines { "RW_PS2" }
+
+	filter { "platforms:*amd64*" }
+		architecture "x86_64"
+	filter { "platforms:*x86*" }
+		architecture "x86"
+
+	filter { "platforms:win*" }
+		system "windows"
+	filter { "platforms:linux*" }
+		system "linux"
+	filter {}
+
+	Libdir = "lib/%{cfg.platform}/%{cfg.buildcfg}"
+	Bindir = "bin/%{cfg.platform}/%{cfg.buildcfg}"
+
+project "librw"
+	kind "StaticLib"
+	targetname "rw"
+	targetdir (Libdir)
+	files { "src/*.*" }
+	files { "src/*/*.*" }
+
+project "dumprwtree"
+	kind "ConsoleApp"
+	targetdir (Bindir)
+	files { "tools/dumprwtree/*" }
+	includedirs { "." }
+	libdirs { Libdir }
+	links { "librw" }