rajamesandClaude Sonnet 4.6
0820ee7d32
T= now names a specific board (qemu, pc, pi4, pi5, milkv) rather than an arch alias. mk/boards.mk is the single table: sets ARCH, BOARD, and BOARD_NAME. Each Makefile applies board-specific compiler flags after its arch block — pi5 gets Cortex-A76 tuning, pi4 gets Cortex-A72, qemu uses portable x86-64 baseline instead of -march=native. Zynq-7020 is stubbed in comments for future 32-bit ARM support. ARCH= override still works for raw arch selection without a named board. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
49 lines
1.4 KiB
Makefile
49 lines
1.4 KiB
Makefile
# Board target table — T= selects board, sets ARCH + BOARD + BOARD_NAME.
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# Included early by both Makefile and Makefile.starkernel, before arch
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# normalization runs. Each Makefile applies board-specific flag overrides
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# after its own arch block.
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#
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# Adding a new board: add an ifeq block here, then add compiler-flag
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# overrides in the board-override sections of Makefile and
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# Makefile.starkernel if the board needs tuning beyond the arch default.
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ifdef T
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ifeq ($(T),qemu)
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ARCH ?= amd64
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BOARD := qemu
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BOARD_NAME := QEMU x86_64
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else ifeq ($(T),pc)
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ARCH ?= amd64
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BOARD := pc
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BOARD_NAME := x86_64 PC (native)
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else ifeq ($(T),pi4)
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ARCH ?= aarch64
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BOARD := pi4
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BOARD_NAME := Raspberry Pi 4 (Cortex-A72)
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else ifeq ($(T),pi5)
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ARCH ?= aarch64
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BOARD := pi5
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BOARD_NAME := Raspberry Pi 5 (Cortex-A76)
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else ifeq ($(T),milkv)
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ARCH ?= riscv64
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BOARD := milkv
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BOARD_NAME := Milk-V Pioneer (SG2042 RISC-V 64)
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# ── Future boards (uncomment + add flag overrides in Makefile / Makefile.starkernel) ──
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# else ifeq ($(T),zynq7020)
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# ARCH ?= arm
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# BOARD := zynq7020
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# BOARD_NAME := Xilinx Zynq-7020 (Cortex-A9, 32-bit)
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# # NOTE: requires removing the 32-bit guardrail and adding armhf toolchain support
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else
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$(error Unknown board target T='$(T)'. Supported: qemu pc pi4 pi5 milkv)
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endif
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endif # ifdef T
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