menu "Build variant"

choice
	prompt "Which StarForth build is this config for"
	default STARFORTH_VARIANT_HOSTED
	help
	  StarForth has two build targets sharing most of the physics/
	  heartbeat knobs below (Makefile, the hosted VM) and (Makefile.
	  starkernel, the bare-metal LithosAnanke kernel). TARGET profiles
	  and platform mode (below) are hosted-only -- the kernel build
	  has no equivalent. HISTORICAL: a third L4Re/Fiasco.OC platform
	  mode existed under this variant through mid-2026; removed as an
	  active target (see "Platform mode" choice below).

config STARFORTH_VARIANT_HOSTED
	bool "Hosted VM (Linux)"

config STARFORTH_VARIANT_KERNEL
	bool "LithosAnanke bare-metal kernel"

endchoice

if STARFORTH_VARIANT_HOSTED

choice
	prompt "Optimization profile (TARGET=)"
	default TARGET_STANDARD
	help
	  Selects the hosted Makefile's TARGET= build profile. "pgo"
	  is not a simple flag set -- it drives a 6-stage instrument/
	  train/optimize recipe (see Makefile's pgo-build target) --
	  so selecting it here only picks which make recipe runs; it
	  does not itself expand into CFLAGS the way the other profiles
	  do.

config TARGET_STANDARD
	bool "standard -- O2, LTO, safe default"

config TARGET_FAST
	bool "fast -- O3, no LTO, easier debugging"

config TARGET_FASTEST
	bool "fastest -- O3, ASM + LTO + direct threading, runs a benchmark after build"

config TARGET_TURBO
	bool "turbo -- O3, ASM-optimized, no direct threading"

config TARGET_PGO
	bool "pgo -- profile-guided optimization (multi-stage recipe)"

config TARGET_ASAN
	bool "asan -- AddressSanitizer/UBSan instrumented"

endchoice

config TARGET_STRING
	string
	default "standard" if TARGET_STANDARD
	default "fast" if TARGET_FAST
	default "fastest" if TARGET_FASTEST
	default "turbo" if TARGET_TURBO
	default "pgo" if TARGET_PGO
	default "asan" if TARGET_ASAN

choice
	prompt "Platform mode"
	default PLATFORM_DEFAULT
	help
	  Mutually exclusive platform modes (hosted Makefile's MINIMAL=1
	  ifdef). MINIMAL swaps in freestanding-style platform sources.

	  HISTORICAL: a third mode, PLATFORM_L4RE (L4RE=1 -- forced
	  HEARTBEAT_THREAD_ENABLED off, dropped -pthread), existed here
	  through mid-2026. L4Re/Fiasco.OC support has been removed as an
	  active target; see Makefile's "Platform support" section for
	  the commented-out restoration path if it's ever needed again.

config PLATFORM_DEFAULT
	bool "Default (Linux hosted)"

config PLATFORM_MINIMAL
	bool "Minimal (freestanding, no libc dependency surface) [DISABLED]"
	help
	  DISABLED 2026-07-08: selecting this sets MINIMAL=1, which the
	  Makefile now deliberately fails with $(error ...). The freestanding
	  platform layer (src/platform/starforth_minimal.c) was never
	  written -- only 5 of ~90 source files have any STARFORTH_MINIMAL
	  awareness. Not a quick fix; see Makefile's "ifdef MINIMAL" comment
	  for what a real fix would require.

endchoice

endif # STARFORTH_VARIANT_HOSTED

endmenu