# Amiga (Bebbo m68k-amigaos-gcc) build rules.

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

PLATFORM := amiga
BUILD    := $(REPO_DIR)/build/$(PLATFORM)
LIBDIR   := $(BUILD)/lib
BINDIR   := $(BUILD)/bin

# PTPlayer is staged by toolchains/install.sh into PTPLAYER_DIR; we
# reference its ptplayer.asm + header from there rather than copying
# them into the source tree, so install.sh can refresh / version it
# independently. -I on $(SRC_PORT)/amiga lets ptplayer.h resolve
# <SDI_compiler.h> from the port-local shim alongside our HAL code.
PTPLAYER_DIR := $(REPO_DIR)/toolchains/amiga/ptplayer
CFLAGS  := $(COMMON_CFLAGS) -DJOEYLIB_PLATFORM_AMIGA -m68000 -fomit-frame-pointer -noixemul -D__OSCOMPAT -I$(SRC_PORT)/amiga -I$(SRC_68K) -I$(PTPLAYER_DIR)
# OSCOMPAT=1 selects PTPlayer's audio.device-friendly variant (uses
# CIA-B + audio.device interrupts via the OS rather than taking over
# Paula directly), matching the way our HAL cooperates with Intuition.
# vasm is only invoked for ptplayer.asm here -- Frank Wille's source
# is written in Devpac/vasm syntax and there is no maintained GAS-
# syntax port. JoeyLib's own .s files are GAS syntax and assembled by
# the bundled m68k-amigaos-as via the gcc driver.
# -Fhunk matches Bebbo gcc-amigaos's AmigaOS HUNK object format. ELF
# objects from vasm cannot be linked into a HUNK libjoey.a (the ar
# "file format not recognized" failure mode is silent at archive time
# and surfaces as undefined references at every binary's link step).
PTPLAYER_ASFLAGS := -Fhunk -m68000 -quiet -DOSCOMPAT=1
# --allow-multiple-definition lets our user-space tzset stub
# (src/port/amiga/libinit.c) win over libnix's version in
# __gmtoffset.o. libnix's tzset dereferences a possibly-NULL
# LocaleBase; our no-op skips the deref.
LDFLAGS := -noixemul -Wl,--allow-multiple-definition

PORT_C_SRCS := $(wildcard $(SRC_PORT)/amiga/*.c)
PORT_S_SRCS := $(wildcard $(SRC_PORT)/amiga/*.s)
SHARED_S    := $(wildcard $(SRC_68K)/*.s)

# Amiga uses PTPlayer's mt_playfx for SFX, not the libxmp+overlay
# combo that DOS and ST share, so the shared SFX overlay mixer in
# src/core/audioSfxMix.c is unused here. Filter it out to keep dead
# code out of every Amiga binary.
CORE_C_SRCS_AMIGA := $(filter-out %/audioSfxMix.c, $(CORE_C_SRCS))

# Sprite codegen: 68k emitter shared with the ST port.
CODEGEN_DIR := $(REPO_DIR)/src/codegen

LIB_OBJS := \
    $(patsubst $(SRC_CORE)/%.c,$(BUILD)/obj/core/%.o,$(CORE_C_SRCS_AMIGA)) \
    $(patsubst $(SRC_PORT)/amiga/%.c,$(BUILD)/obj/port/%.o,$(PORT_C_SRCS)) \
    $(patsubst $(SRC_PORT)/amiga/%.s,$(BUILD)/obj/port/%.o,$(PORT_S_SRCS)) \
    $(patsubst $(SRC_68K)/%.s,$(BUILD)/obj/68k/%.o,$(SHARED_S)) \
    $(BUILD)/obj/port/ptplayer.o \
    $(BUILD)/obj/codegen/spriteEmit68k.o \
    $(BUILD)/obj/codegen/spriteCompile.o

LIB := $(LIBDIR)/libjoey.a

HELLO_SRC   := $(EXAMPLES)/hello/hello.c
HELLO_BIN   := $(BINDIR)/Hello
PATTERN_SRC := $(EXAMPLES)/pattern/pattern.c
PATTERN_BIN := $(BINDIR)/Pattern
DRAW_SRC    := $(EXAMPLES)/draw/draw.c
DRAW_BIN    := $(BINDIR)/Draw
KEYS_SRC    := $(EXAMPLES)/keys/keys.c
KEYS_BIN    := $(BINDIR)/Keys
JOY_SRC     := $(EXAMPLES)/joy/joy.c
JOY_BIN     := $(BINDIR)/Joy
SPRITE_SRC  := $(EXAMPLES)/sprite/sprite.c
SPRITE_BIN  := $(BINDIR)/Sprite
AUDIO_SRC   := $(EXAMPLES)/audio/audio.c
AUDIO_BIN   := $(BINDIR)/Audio
UBER_SRC    := $(EXAMPLES)/uber/uber.c
UBER_BIN    := $(BINDIR)/Uber

# Game data lives under bin/DATA/, ready to be copied into the
# scratch JOEYLIB hard-drive dir staged by scripts/run-amiga.sh.
# audio.c fopens "DATA/test.mod" etc. relative to the boot volume.
DATA_DIR    := $(BINDIR)/DATA
DATA_FILES  := $(DATA_DIR)/test.mod $(DATA_DIR)/test.sfx

.PHONY: all amiga clean-amiga
all amiga: $(LIB) $(HELLO_BIN) $(PATTERN_BIN) $(DRAW_BIN) $(KEYS_BIN) $(JOY_BIN) $(SPRITE_BIN) $(AUDIO_BIN) $(UBER_BIN) $(DATA_FILES)

$(BUILD)/obj/core/%.o: $(SRC_CORE)/%.c
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) -c $< -o $@

$(BUILD)/obj/port/%.o: $(SRC_PORT)/amiga/%.c
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) -c $< -o $@

# Hand-written 68k assembly: GAS syntax, fed through the gcc driver
# so the bundled m68k-amigaos-as (binutils) does the work.
$(BUILD)/obj/port/%.o: $(SRC_PORT)/amiga/%.s
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) -c $< -o $@

# PTPlayer is third-party Devpac/vasm-syntax assembly with no
# maintained GAS port; vasm is invoked only here.
$(BUILD)/obj/port/ptplayer.o: $(PTPLAYER_DIR)/ptplayer.asm
	@mkdir -p $(dir $@)
	$(AMIGA_AS) $(PTPLAYER_ASFLAGS) $< -o $@

$(BUILD)/obj/codegen/%.o: $(CODEGEN_DIR)/%.c
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) -I$(CODEGEN_DIR) -c $< -o $@

$(BUILD)/obj/68k/%.o: $(SRC_68K)/%.s
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) -c $< -o $@

$(LIB): $(LIB_OBJS)
	@mkdir -p $(dir $@)
	$(AMIGA_AR) rcs $@ $^

$(HELLO_BIN): $(HELLO_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(PATTERN_BIN): $(PATTERN_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(DRAW_BIN): $(DRAW_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(KEYS_BIN): $(KEYS_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(JOY_BIN): $(JOY_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(SPRITE_BIN): $(SPRITE_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(AUDIO_BIN): $(AUDIO_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(UBER_BIN): $(UBER_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(AMIGA_CC) $(CFLAGS) $< $(LIB) -o $@ $(LDFLAGS)

$(DATA_DIR)/test.mod: $(REPO_DIR)/assets/test.mod
	@mkdir -p $(DATA_DIR)
	cp $< $@

$(DATA_DIR)/test.sfx: $(REPO_DIR)/assets/test.sfx
	@mkdir -p $(DATA_DIR)
	cp $< $@

clean-amiga:
	rm -rf $(BUILD)