# Apple IIgs build rules (llvm-mos w65816: clang + llvm-mc + link816).
#
# toolchains/iigs/clang-build.sh drives compile (clang) / assemble
# (llvm-mc) / link (link816) against the prebuilt w65816 runtime.
# Hand-rolled asm lives in src/port/iigs/*.s (llvm-mc GAS syntax);
# bank placement is handled by -ffunction-sections + link816
# dead-stripping.
#
# STATUS: the launchable-binary pipeline (multi-segment OMF emission +
# disk packaging + GS/OS launch) is still being brought up. `iigs-lib`
# compile-checks every library + example translation unit, and
# `iigs-clang-smoke` validates the full clang -> llvm-mc -> link816 ->
# MAME path end to end. Per-example binary targets build via
# clang-build.sh; large examples need the multi-segment OMF wiring still
# in progress.

include $(dir $(lastword $(MAKEFILE_LIST)))/common.mk

PLATFORM := iigs
BUILD    := $(REPO_DIR)/build/$(PLATFORM)
BINDIR   := $(BUILD)/bin
OBJDIR   := $(BUILD)/obj

CLANG    := $(LLVM816_ROOT)/tools/llvm-mos-build/bin/clang
RT_INC   := $(LLVM816_ROOT)/runtime/include
CFLAGS   := --target=w65816 -O2 -ffreestanding -ffunction-sections
INCLUDES := -I$(RT_INC) -I$(INCLUDE_DIR) -I$(INCLUDE_DIR)/joey -I$(SRC_CORE) -I$(REPO_DIR)/src/codegen

PORT_C_SRCS   := $(wildcard $(SRC_PORT)/iigs/*.c)
# Hand-rolled asm, migrated to llvm-mc GAS .s.
PORT_ASM_SRCS := $(wildcard $(SRC_PORT)/iigs/*.s)

# IIgs uses NTPstreamsound for SFX, not the libxmp+overlay combo that
# DOS and ST share, so src/core/audioSfxMix.c is unused here.
CORE_C_SRCS_IIGS := $(filter-out %/audioSfxMix.c, $(CORE_C_SRCS))

# Sprite codegen: 65816 emitter + cross-platform compile dispatch.
CODEGEN_SRCS := $(REPO_DIR)/src/codegen/spriteEmitIigs.c \
                $(REPO_DIR)/src/codegen/spriteCompile.c

LIB_C_SRCS := $(CORE_C_SRCS_IIGS) $(PORT_C_SRCS) $(CODEGEN_SRCS)
LIB_SRCS   := $(LIB_C_SRCS) $(PORT_ASM_SRCS)

# Example sources (single-TU unless noted).
PATTERN_SRC := $(EXAMPLES)/pattern/pattern.c
DRAW_SRC    := $(EXAMPLES)/draw/draw.c
KEYS_SRC    := $(EXAMPLES)/keys/keys.c
JOY_SRC     := $(EXAMPLES)/joy/joy.c
SPRITE_SRC  := $(EXAMPLES)/sprite/sprite.c
UBER_SRC    := $(EXAMPLES)/uber/uber.c
ADV_SRC     := $(EXAMPLES)/adventure/adventure.c
ADV2_SRC    := $(EXAMPLES)/adventure2/adventure2.c
AGI_SRCS    := $(EXAMPLES)/agi/agi.c $(EXAMPLES)/agi/agiRes.c $(EXAMPLES)/agi/agiPic.c $(EXAMPLES)/agi/agiView.c $(EXAMPLES)/agi/agiVm.c $(EXAMPLES)/agi/agiObj.c $(EXAMPLES)/agi/agiText.c
STAXI_SRCS  := $(EXAMPLES)/spacetaxi/spacetaxi.c $(EXAMPLES)/spacetaxi/stLevel.c $(EXAMPLES)/spacetaxi/stRender.c $(EXAMPLES)/spacetaxi/stEngine.c $(EXAMPLES)/spacetaxi/stPassenger.c $(EXAMPLES)/spacetaxi/stHud.c $(EXAMPLES)/spacetaxi/stAudio.c

.PHONY: all iigs iigs-lib iigs-clang-smoke clean-iigs

# Default: compile-check the library + run the end-to-end smoke test.
all iigs: iigs-lib iigs-clang-smoke

# Compile-check every library and example translation unit with clang,
# and assemble every .s with llvm-mc. This is the canonical "does the
# IIgs source still build" gate while the launchable pipeline is wired.
iigs-lib:
	@mkdir -p $(OBJDIR)
	@set -e; \
	for c in $(LIB_C_SRCS); do \
	    echo "  CC  $$c"; \
	    $(CLANG) $(CFLAGS) $(INCLUDES) -c $$c -o $(OBJDIR)/$$(echo $$c | sed 's#[/.]#_#g').o; \
	done; \
	for s in $(PORT_ASM_SRCS); do \
	    echo "  AS  $$s"; \
	    $(LLVM816_ROOT)/tools/llvm-mos-build/bin/llvm-mc -arch=w65816 -filetype=obj $$s -o $(OBJDIR)/$$(basename $$s .s).o; \
	done

# End-to-end smoke test: clang -> llvm-mc -> link816 -> MAME, validating
# the ported asm computes correctly on emulated hardware.
iigs-clang-smoke:
	$(REPO_DIR)/toolchains/iigs/clang-smoke.sh

# Per-example binaries via clang-build.sh. clang-build.sh mirrors the
# old driver's CLI (-I / -o / -M; -s and -b are accepted no-ops). These
# link single-segment today; examples larger than one bank need the
# multi-segment OMF wiring still in progress.
DEP_DIR := $(BUILD)/dep

$(BINDIR)/PATTERN: $(PATTERN_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/PATTERN.d $(INCLUDES) -o $@ $(PATTERN_SRC) $(LIB_SRCS)

$(BINDIR)/DRAW: $(DRAW_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/DRAW.d $(INCLUDES) -o $@ $(DRAW_SRC) $(LIB_SRCS)

$(BINDIR)/KEYS: $(KEYS_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/KEYS.d $(INCLUDES) -o $@ $(KEYS_SRC) $(LIB_SRCS)

$(BINDIR)/JOY: $(JOY_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/JOY.d $(INCLUDES) -o $@ $(JOY_SRC) $(LIB_SRCS)

$(BINDIR)/SPRITE: $(SPRITE_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/SPRITE.d $(INCLUDES) -o $@ $(SPRITE_SRC) $(LIB_SRCS)

$(BINDIR)/UBER: $(UBER_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/UBER.d $(INCLUDES) -o $@ $(UBER_SRC) $(LIB_SRCS)

$(BINDIR)/ADV: $(ADV_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/ADV.d $(INCLUDES) -o $@ $(ADV_SRC) $(LIB_SRCS)

$(BINDIR)/ADV2: $(ADV2_SRC) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/ADV2.d $(INCLUDES) -o $@ $(ADV2_SRC) $(LIB_SRCS)

$(BINDIR)/AGI: $(AGI_SRCS) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/AGI.d $(INCLUDES) -I$(EXAMPLES)/agi -o $@ $(AGI_SRCS) $(LIB_SRCS)

$(BINDIR)/STAXI: $(STAXI_SRCS) $(LIB_SRCS) $(IIGS_CLANG_BUILD)
	@mkdir -p $(dir $@) $(DEP_DIR)
	$(IIGS_CLANG_BUILD) -M $(DEP_DIR)/STAXI.d $(INCLUDES) -I$(EXAMPLES)/spacetaxi -o $@ $(STAXI_SRCS) $(LIB_SRCS)

# NOTE: the audio example is omitted until the NinjaTrackerPlus replayer
# is wired into the clang build (a path for baking the replayer bytes
# into a data segment via llvm-mc is pending).

clean-iigs:
	rm -rf $(BUILD)

-include $(wildcard $(DEP_DIR)/*.d)