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# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2026 Richard Qin
#
# scripts/Kbuild.include — shared Make helpers for LumeOS.
#
# Mirrors a small, useful subset of Linux's scripts/Kbuild.include.
# Provides:
#
# - Q / KBUILD_VERBOSE : `make V=1` shows full commands,
# default V=0 prints a one-line summary
# - $(call cmd,<name>) : echo a quiet summary, then run cmd_<name>
# - $(call if_changed,<name>) : rebuild when inputs or the command change.
#
# Naming convention adopted from Linux: each command has both a
# `quiet_cmd_<name>` (single-line summary) and a `cmd_<name>` (full
# command line). $(quiet) selects which prefix to display:
# V=0 -> quiet := quiet_ -> echoes " CC foo.c"
# V=1 -> quiet := -> echoes the full $(CC) $(CFLAGS) ...
# ----------------------------------------------------------------------
# --- Verbosity ---------------------------------------------------------
# Override at the command line: `make V=1`. Default V=0 = quiet.
KBUILD_VERBOSE ?= $(V)
KBUILD_VERBOSE ?= 0
ifeq ($(KBUILD_VERBOSE),1)
Q :=
quiet :=
else
Q := @
quiet := quiet_
endif
# --- echo-cmd / cmd / if_changed ---------------------------------------
#
# echo-cmd prints the recipe's one-line summary (when quiet) or its full
# command line (when verbose). Implementation uses $($(quiet)cmd_<name>)
# so the right form is picked up automatically.
#
# cmd is the workhorse: print summary, then execute the real command.
echo-cmd = $(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';)
cmd = @$(echo-cmd) $(cmd_$(1))
# Record a checksum of the exact argv next to each output. FORCE makes Make
# reconsider the action; run-if-changed executes it only for a changed input or
# command signature.
if_changed = @scripts/build/run-if-changed.sh \
$(dir $@).$(notdir $@).cmd $@ '$($(quiet)cmd_$(1))' $^ -- $(cmd_$(1))
# --- Standard quiet_cmd_* / cmd_* templates ---------------------------
#
# Subdir Makefiles and the top-level Makefile can reference these by
# name via $(call cmd,<name>). Add new pairs here as new recipe shapes
# show up (e.g., cmd_lz / cmd_gz / cmd_zstd for compressed Image targets).
quiet_cmd_cc_o_c = CC $(PRIVATE_SOURCE)
cmd_cc_o_c = $(CC) $(CFLAGS_LIBC) $(PRIVATE_INCLUDES) $(PRIVATE_DEFINES) $(PRIVATE_CFLAGS) -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_cxx_o_cc = CXX $(PRIVATE_SOURCE)
cmd_cxx_o_cc = $(CXX) $(CXXFLAGS) $(PRIVATE_INCLUDES) $(PRIVATE_DEFINES) $(PRIVATE_CXXFLAGS) -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_as_o_S = AS $(PRIVATE_SOURCE)
cmd_as_o_S = $(CC) $(ASFLAGS) $(PRIVATE_INCLUDES) $(PRIVATE_DEFINES) $(PRIVATE_ASFLAGS) -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_cc_s_c = CC -S $<
cmd_cc_s_c = $(CC) $(CFLAGS_LIBC) -S $(PRIVATE_SOURCE) -o $@
quiet_cmd_gen_asm_offsets = GEN $@
cmd_gen_asm_offsets = scripts/build/generate-asm-offsets.sh $@ \
$(ASM_OFFSETS_S) $(ASM_OFFSETS_SED) $(ASM_OFFSETS_C)
quiet_cmd_autoconf = GEN $@
cmd_autoconf = scripts/build/generate-autoconf.sh $@ \
CONFIG_NR_CPUS $(CONFIG_NR_CPUS) value \
CONFIG_HZ $(CONFIG_HZ) value \
CONFIG_NR_PRIORITIES $(CONFIG_NR_PRIORITIES) value \
CONFIG_DEFAULT_PRIORITY $(CONFIG_DEFAULT_PRIORITY) value \
CONFIG_IDLE_PRIORITY $(CONFIG_IDLE_PRIORITY) value \
CONFIG_DEFAULT_TIMESLICE $(CONFIG_DEFAULT_TIMESLICE) value \
CONFIG_PAGE_SIZE $(CONFIG_PAGE_SIZE) value \
CONFIG_MAX_ORDER $(CONFIG_MAX_ORDER) value \
CONFIG_KERNEL_STACK_SIZE $(CONFIG_KERNEL_STACK_SIZE) value \
CONFIG_KASLR $(CONFIG_KASLR) bool \
CONFIG_KASLR_POLICY_ID $(CONFIG_KASLR_POLICY_ID) value \
CONFIG_KASLR_LOG_LEVEL $(CONFIG_KASLR_LOG_LEVEL) value \
CONFIG_STACK_CANARY $(CONFIG_STACK_CANARY) bool \
CONFIG_DEBUG $(CONFIG_DEBUG) bool \
CONFIG_DEBUG_LOCKS $(CONFIG_DEBUG_LOCKS) bool \
CONFIG_SELFTEST $(CONFIG_SELFTEST) bool \
CONFIG_KLOG $(CONFIG_KLOG) bool \
CONFIG_KERNEL_COMPRESSED $(CONFIG_KERNEL_COMPRESSED) bool
quiet_cmd_linker_script = LDS $@
cmd_linker_script = $(CC) -E -P -x c $(INCLUDES) $(PRIVATE_SOURCE) -o $@
quiet_cmd_initramfs = INITRAMFS $(INITRAMFS_SOURCE)
cmd_initramfs = scripts/build/generate-initramfs.sh $(GEN_INIT_CPIO) \
./scripts/gen_initramfs.sh $@ \
$(CONFIG_INITRAMFS_ROOT_UID) $(CONFIG_INITRAMFS_ROOT_GID) \
$(INITRAMFS_SOURCE)
quiet_cmd_initramfs_obj = AS $@ (initramfs)
cmd_initramfs_obj = $(CC) $(ASFLAGS) \
-DINITRAMFS_IMAGE='"$(INITRAMFS_CPIO)"' \
-c $(PRIVATE_SOURCE) -o $@
quiet_cmd_objcopy_bin = OBJCOPY $@
cmd_objcopy_bin = $(OBJCOPY) -O binary $< $@
quiet_cmd_archive = AR $@
cmd_archive = scripts/build/archive.sh $@ $(AR) $(PRIVATE_ARCHIVE_OBJECTS)
quiet_cmd_host_tool = HOSTCC $@
cmd_host_tool = $(HOSTCC) $(HOSTCFLAGS) $(PRIVATE_HOST_CFLAGS) \
-o $@ $(PRIVATE_HOST_SOURCE)
quiet_cmd_host_cc_o_c = HOSTCC $(PRIVATE_SOURCE)
cmd_host_cc_o_c = $(HOSTCC) $(HOSTCFLAGS) -MMD -MP -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_host_cxx_o_cc = HOSTCXX $(PRIVATE_SOURCE)
cmd_host_cxx_o_cc = $(HOSTCXX) $(HOSTCXXFLAGS) -MMD -MP -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_host_archive = HOSTAR $@
cmd_host_archive = scripts/build/archive.sh $@ $(HOSTAR) $(PRIVATE_ARCHIVE_OBJECTS)
quiet_cmd_host_link = HOSTLD $@
cmd_host_link = $(HOSTCXX) $(HOSTCXXFLAGS) -o $@ \
$(PRIVATE_HOST_OBJECTS) $(PRIVATE_HOST_LIBS)
quiet_cmd_toolchain_probe = PROBE toolchain
cmd_toolchain_probe = scripts/build/probe-toolchain.sh $@ \
$(CC) $(CXX) $(LD) $(COMPILER_FAMILY) $(TARGET_TRIPLE) \
'$(GCC_TOOLCHAIN)' '$(GCC_SYSROOT)' \
'$(KTL_INCLUDE)' '$(KTL_AFTER_INCLUDE)' \
'$(KERNEL_LIBC_INCLUDE)' '$(KERNEL_LIBC_AFTER_INCLUDE)' \
'$(LIBCXX_INCLUDE)' '$(COMPILER_RESOURCE_INCLUDE)'
quiet_cmd_phys_cc_o_c = PHYSCC $(PRIVATE_SOURCE)
cmd_phys_cc_o_c = $(CC) $(PHYS_CFLAGS) -MMD -MP -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_phys_cxx_o_cc = PHYSCXX $(PRIVATE_SOURCE)
cmd_phys_cxx_o_cc = $(CXX) $(PHYS_CXXFLAGS) -MMD -MP -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_phys_as_o_S = PHYSAS $(PRIVATE_SOURCE)
cmd_phys_as_o_S = $(CC) $(PHYS_ASFLAGS) -MMD -MP -c $(PRIVATE_SOURCE) -o $@
quiet_cmd_link_vmlume = LD $@
cmd_link_vmlume = scripts/build/link-kernel.sh $@ $(SIZE) \
$(LD) $(LDFLAGS) -T $(LINKER_SCRIPT) -o $@ \
$(KERNEL_LINK_INPUTS) $(INITRAMFS_OBJ)
# Objcopy with custom flags via per-target OBJCOPYFLAGS variable —
# used by the .pi.o post-processing rule (--prefix-symbols=__pi_ etc.).
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $< $@
quiet_cmd_ld_kernel = LD $@
cmd_ld_kernel = $(LD) $(LDFLAGS) -T $(LINKER_SCRIPT) -o $@ $^
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