premake5.lua

-- Allow CI to override via --generator-version=3 for x86-64-support-sourcesdk branch
newoption({
	trigger = "generator-version",
	description = "garrysmod_common PROJECT_GENERATOR_VERSION (2 = default, 3 = x86-64-support-sourcesdk)",
	value = "2"
})
PROJECT_GENERATOR_VERSION = tonumber(_OPTIONS["generator-version"]) or 2

newoption({
	trigger = "gmcommon",
	description = "Sets the path to the garrysmod_common (https://github.com/danielga/garrysmod_common) directory",
	value = "../garrysmod_common"
})

newoption({
	trigger = "with-vulkan",
	description = "Enable the Vulkan GPU backend (off by default; CPU-only build)"
})
local WITH_VULKAN = _OPTIONS["with-vulkan"] ~= nil

local gmcommon = assert(_OPTIONS.gmcommon or os.getenv("GARRYSMOD_COMMON"),
	"you didn't provide a path to your garrysmod_common (https://github.com/danielga/garrysmod_common) directory")
include(gmcommon)

local module_name = WITH_VULKAN and "auris-gpu" or "auris"
CreateWorkspace({name = module_name, abi_compatible = false, path = "projects/" .. os.target() .. "/" .. _ACTION})
	CreateProject({serverside = true, source_path = "source", manual_files = false})
		warnings("Default")
		IncludeSDKCommon()
		IncludeSDKTier0()
		IncludeSDKTier1()
		IncludeSteamAPI()
		IncludeDetouring()
		IncludeScanning()
		IncludeHelpersExtended()

		-- whisper.cpp vendor files
		includedirs({
			"vendor/whisper.cpp/include",
			"vendor/whisper.cpp/ggml/include",
			"vendor/whisper.cpp/ggml/src",
			"vendor/whisper.cpp/ggml/src/ggml-cpu",
		})
		files({
			"vendor/whisper.cpp/src/whisper.cpp",
			"vendor/whisper.cpp/ggml/src/*.c",
			"vendor/whisper.cpp/ggml/src/*.cpp",
			"vendor/whisper.cpp/ggml/src/ggml-cpu/*.c",
			"vendor/whisper.cpp/ggml/src/ggml-cpu/*.cpp",
			"vendor/whisper.cpp/ggml/src/ggml-cpu/arch/x86/*.c",
			"vendor/whisper.cpp/ggml/src/ggml-cpu/arch/x86/*.cpp",
		})
		local versionFile = io.open("VERSION", "r")
		local aurisVersion = versionFile and versionFile:read("*l") or "unknown"
		if versionFile then versionFile:close() end

		defines({
			"AURIS_VERSION=\"" .. aurisVersion .. "\"",
			"GGML_USE_CPU",
			"WHISPER_VERSION=\"1.0.0\"",
			"GGML_VERSION=\"1.0.0\"",
			"GGML_COMMIT=\"local\"",
			"NDEBUG",
		})

		-- Optimization for whisper.cpp — flags split by toolset
		optimize("Speed")
		vectorextensions("AVX2")

		filter("toolset:msc*")
			flags({"NoBufferSecurityCheck"})
			buildoptions({"/fp:fast", "/Ox", "/GL", "/arch:AVX2"})
			linkoptions({"/LTCG"})

		filter("toolset:gcc or clang")
			defines({"_GNU_SOURCE"})
			-- -ffast-math enables -ffinite-math-only which ggml explicitly forbids
			-- (vec.h line 1069 #errors on __FINITE_MATH_ONLY__). Use the safe subset instead.
			-- -fno-stack-protector omitted: EDRs (CrowdSec, VirusTotal) flag binaries built without
			-- stack protection as exploit-facilitating, triggering false CVE-2023-4911 detections.
			buildoptions({"-fno-math-errno", "-funsafe-math-optimizations", "-fno-rounding-math", "-fno-signaling-nans", "-O3", "-flto", "-mavx2", "-mfma", "-mf16c"})
			linkoptions({"-flto"})

		-- 32-bit x86 Linux: force SSE2 scalar FP to match x86_64 behavior.
		-- Without this GCC uses x87 (80-bit extended precision) for scalar floats,
		-- causing whisper softmax/logit values to diverge from every other platform.
		filter("toolset:gcc or clang", "platforms:x86", "system:linux")
			buildoptions({"-mfpmath=sse", "-msse2"})

		filter({})

		-- Opus for decoding steam voice
		includedirs({"vendor/opus/include"})
		filter("platforms:x86")
			libdirs({path.getabsolute("vendor/opus/lib32")})
		filter("platforms:x86_64")
			libdirs({path.getabsolute("vendor/opus/lib64")})
		filter({})
		links({"opus"})

		-- Vulkan GPU backend (opt-in via --with-vulkan)
		-- Without this flag the module is CPU-only and has no libvulkan dep,
		-- so it loads on headless dedis with no Vulkan loader installed.
		if WITH_VULKAN then
			local vulkan_sdk = os.getenv("VULKAN_SDK") or "C:/VulkanSDK/1.4.341.1"
			defines({"GGML_USE_VULKAN"})
			includedirs({
				"vendor/whisper.cpp/ggml/src/ggml-vulkan",
			})
			files({
				"vendor/whisper.cpp/ggml/src/ggml-vulkan/ggml-vulkan.cpp",
				"vendor/whisper.cpp/ggml/src/ggml-vulkan/ggml-vulkan-shaders.cpp",
			})

			-- Windows: Vulkan SDK headers + import lib
			filter("system:windows")
				includedirs({vulkan_sdk .. "/Include"})
				links({"vulkan-1"})

			-- premake does not support compound filter keys — split into separate filters
			filter({"system:windows", "platforms:x86"})
				libdirs({path.getabsolute("vendor/vulkan/lib32")})
				-- x86 stdcall decorates symbols with @N but the import lib has
				-- undecorated names. Map the 3 directly-linked Vulkan symbols.
				linkoptions({
					"/ALTERNATENAME:_vkCmdCopyBuffer@28=_vkCmdCopyBuffer",
					"/ALTERNATENAME:_vkGetPhysicalDeviceFeatures2@8=_vkGetPhysicalDeviceFeatures2",
					"/ALTERNATENAME:_vkGetInstanceProcAddr@8=_vkGetInstanceProcAddr",
				})

			filter({"system:windows", "platforms:x86_64"})
				libdirs({vulkan_sdk .. "/Lib"})

			-- Linux: system Vulkan loader
			-- VULKAN_HPP_TYPESAFE_CONVERSION enables implicit vk:: <-> Vk* handle conversions
			-- that ggml-vulkan.cpp relies on when mixing C and C++ Vulkan APIs.
			filter("system:linux")
				defines({"VULKAN_HPP_TYPESAFE_CONVERSION=1"})
				links({"vulkan"})

			filter({})
		end