From e90b72ec3082588b296956730bd2930cf8d5d671 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Fri, 10 Jul 2026 11:31:46 +0800
Subject: refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.
---
 lib/module.mk | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 lib/module.mk

(limited to 'lib/module.mk')

diff --git a/lib/module.mk b/lib/module.mk
new file mode 100644
index 0000000..0b178f8
--- /dev/null
+++ b/lib/module.mk
@@ -0,0 +1,66 @@
+# lib/module.mk
+SRCS_CC += lib/cxx_abi.cc
+SRCS_CC += lib/rbtree.cc
+SRCS_CC += lib/kobject.cc
+SRCS_CC += lib/kprintf.cc
+SRCS_CC += lib/klog.cc
+SRCS_CC += lib/random.cc
+SRCS_C  += lib/printf.c
+
+# ============================================================
+# musl string library (cross-platform with arch asm overrides)
+# ============================================================
+
+# Map LumeOS ARCH to musl string arch directory
+# riscv has no musl asm optimizations → pure C fallback
+MUSL_STRING_ARCH_riscv  :=
+MUSL_STRING_ARCH_x86_64 := x86_64
+MUSL_STRING_ARCH_i386   := i386
+MUSL_STRING_ARCH_aarch64:= aarch64
+MUSL_STRING_ARCH_arm    := arm
+
+MUSL_STRING_ARCH := $(MUSL_STRING_ARCH_$(ARCH))
+
+# Collect arch-specific asm sources (if any for this arch)
+MUSL_ASM_SRCS :=
+ifneq ($(MUSL_STRING_ARCH),)
+    MUSL_ASM_SRCS += $(wildcard lib/string/$(MUSL_STRING_ARCH)/*.S) \
+                     $(wildcard lib/string/$(MUSL_STRING_ARCH)/*.s)
+endif
+
+# Derive which C files are overridden by asm (strip path+ext to get base name)
+MUSL_ASM_BASENAMES := $(sort $(basename $(notdir $(MUSL_ASM_SRCS))))
+
+# All C sources, then filter out those with asm replacements
+MUSL_ALL_C := $(wildcard lib/string/*.c)
+MUSL_EXCLUDED_C := $(foreach name,$(MUSL_ASM_BASENAMES),lib/string/$(name).c)
+MUSL_C_SRCS := $(filter-out $(MUSL_EXCLUDED_C),$(MUSL_ALL_C))
+
+SRCS_C += $(MUSL_C_SRCS)
+SRCS_S += $(filter %.S,$(MUSL_ASM_SRCS))
+SRCS_s += $(filter %.s,$(MUSL_ASM_SRCS))
+
+# ============================================================
+# libfdt — kernel adapter shims around scripts/dtc/libfdt/.
+#
+# Each shim is two lines:
+#     #include <linux/libfdt_env.h>
+#     #include "../scripts/dtc/libfdt/fdt*.c"
+# matching Linux lib/fdt*.c verbatim.  The compile recipe needs:
+#   - <linux/libfdt_env.h>  reachable via the default -Iinclude path
+#   - -I scripts/dtc/libfdt  so the upstream source's #include <libfdt.h>
+#     and friends resolve to scripts/dtc/libfdt/libfdt.h
+# Overriding CFLAGS_LIBC (which the %.o: %.c rule uses) avoids dragging
+# in libc-shim headers — libfdt is freestanding-compatible and uses
+# only the string functions forward-declared in <linux/libfdt_env.h>.
+# ============================================================
+LIBFDT_FILES := fdt.c fdt_ro.c fdt_wip.c fdt_rw.c fdt_sw.c \
+                fdt_strerror.c fdt_empty_tree.c fdt_addresses.c
+SRCS_C += $(addprefix lib/,$(LIBFDT_FILES))
+
+# Per-target CFLAGS override: plain CFLAGS plus the upstream include dir.
+# Use `=` (recursive) not `:=` because $(CFLAGS) is defined in the top
+# Makefile AFTER this file is included — `:=` would expand it now (empty)
+# and lose -Iinclude, breaking <linux/libfdt_env.h>.
+$(addprefix $(BUILD)/lib/,$(LIBFDT_FILES:.c=.o)): CFLAGS_LIBC = \
+    $(CFLAGS) -I scripts/dtc/libfdt
-- 
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