--------------------------------
--                            --
--    Spectre build config    --
--                            --
--------------------------------
Import(".bam/utils.lua")
Import(".bam/functions.lua")
CheckVersion("0.5")

--------------------------------
--                            --
--      Environment Setup     --
--                            --
--------------------------------

-- Target specified on command line or get host system.
TARGET_OS = ScriptArgs.target or host_system()

if not valid_system(TARGET_OS) then
	print ("System not supported" )
	print ("Supported systems are: " .. supported_systems() )
	return 1
end

-- paths used when building.
paths = {
	-- Root build directory.
	build		 = ScriptArgs.build_dir or "build",

	-- Directory where internal object/libs files are
	-- stored to produce the final library.
	intermediate = PathJoin("spectre", TARGET_OS),

	object 		 = "obj",
	examples 	 = "examples_" .. TARGET_OS
}

--------------------------------
--                            --
--    Global Build Settings   --
--                            --
--------------------------------

global_settings = NewSettings();

-- Build type
--------------------------------
global_settings.debug = 1
global_settings.optimize = 0

if ScriptArgs.type ~= nil and ScriptArgs.type:match("^release") then
	global_settings.debug = 0
	if ScriptArgs.type == "release-fast" then
		global_settings.optimize = 1
	end
end


-- Output configuration
--------------------------------

-- Output path for static libraries.
global_settings.lib.prefix = Path(paths.build) .. "/"

global_settings.link.Output = function(settings, input)
	return Path(PathJoin(paths.build, input))
end

global_settings.cc.Output = function(settings, input)
	local path = PathJoin(paths.build, paths.intermediate)
	return Path(PathJoin(PathJoin(path, paths.object), PathBase(input)))
end

-- Compiler configuration
--------------------------------

-- MSVC complains about exception handler without this flag.
if global_settings.cc.exe_cxx == "cl" then
	global_settings.cc.flags:Add('/EHsc')
end

--------------------------------
--                            --
--       Build Targets        --
--                            --
--------------------------------

Import("engine.build.lua")
Import("examples/build.lua")

-- Set engine library as default target
DefaultTarget(libspectre)