CROSS_DIR :=	/opt/cross-m68k/bin
CROSS_TRI :=	m68k-none-elf
CROSS_PRE :=	$(CROSS_DIR)/$(CROSS_TRI)

CROSS_GCC :=	$(CROSS_PRE)-gcc
CROSS_AS :=		$(CROSS_PRE)-as

# -mshort sets the size of an int to 16 bits; important for interop with
# the hand-written assembly language code

FLAGS :=		-Os -m68000 -mshort -Wall -Wextra \
				-Wpedantic -Wcast-align -Wcast-qual -Wconversion -Wsign-conversion \
				-Wshadow -Wmissing-declarations -Wredundant-decls \
				-I include

FLAGS_COM :=	$(FLAGS) -std=c99 -ffreestanding \
				-fno-strict-aliasing -fno-inline -fno-omit-frame-pointer

FLAGS_ASM :=	$(FLAGS)

HEADERS :=		$(wildcard include/*.h)

PROLOG_C :=		croot.c
PROLOG_S :=		fsmain.s

PROLOG_CO :=	$(PROLOG_C:.c=.o)
PROLOG_SO :=	$(PROLOG_S:.s=.o)

PROLOG_SRC :=	$(PROLOG_C:%=prolog/%) $(PROLOG_S:%=prolog/%)
PROLOG_OBJ :=	$(PROLOG_CO:%=build/%) $(PROLOG_SO:%=build/%)

build/%.o:		prolog/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

build/%.o:		prolog/%.s $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_ASM) -c -o $@ $<

IOLIB_C :=		dofmt.c mdump.c pause.c printf.c rawio.c sprintf.c waitcr.c
IOLIB_S :=		hwdefs.s rtraps.s setipl.s setsr.s traps.s

IOLIB_CO :=		$(IOLIB_C:.c=.o)
IOLIB_SO :=		$(IOLIB_S:.s=.o)

IOLIB_SRC :=	$(IOLIB_C:%=iolib/%) $(IOLIB_S:%=iolib/%)
IOLIB_OBJ :=	$(IOLIB_CO:%=build/%) $(IOLIB_SO:%=build/%)

build/%.o:		iolib/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

build/%.o:		iolib/%.s $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_ASM) -c -o $@ $<

LIBCIO_C :=		atoi.c atol.c blkrd.c blkwr.c close.c clusmap.c conin.c conwr.c \
				dirfns.c fgets.c filesys.c filname.c flread.c fopen.c fprintf.c \
				fputs.c fread.c fscanf.c fseek.c fsinit.c fsize.c fstubs.c ftell.c \
				fwrite.c getbuff.c getc.c getl.c getw.c lseek.c open.c posit.c putc.c \
				putl.c putw.c read.c readrn.c rename.c scan.c setbuf.c ungetc.c \
				unlink.c write.c writern.c

LIBCIO_S :=		ptcl12.s

LIBCIO_CO :=	$(LIBCIO_C:.c=.o)
LIBCIO_SO :=	$(LIBCIO_S:.s=.o)

LIBCIO_SRC :=	$(LIBCIO_C:%=libcio/%) $(LIBCIO_S:%=libcio/%)
LIBCIO_OBJ :=	$(LIBCIO_CO:%=build/%) $(LIBCIO_SO:%=build/%)

build/%.o:		libcio/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

build/%.o:		libcio/%.s $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_ASM) -c -o $@ $<

LIBSM_C :=		index.c memccpy.c memchr.c memcmp.c memcmpu.c memcpy.c memcpyw.c \
				memset.c memsetw.c rindex.c str2lc.c str2uc.c strcat.c strccpy.c \
				strchr.c strcmp.c strcpy.c strcspn.c strfill.c strlcmp.c strlen.c \
				strltrm.c strncat.c strncmp.c strncpy.c strpbrk.c strrchr.c strrev.c \
				strrevi.c strrtrm.c strspn.c strtok.c strtol.c

LIBSM_CO :=		$(LIBSM_C:.c=.o)

LIBSM_SRC :=	$(LIBSM_C:%=libsm/%)
LIBSM_OBJ :=	$(LIBSM_CO:%=build/%)

build/%.o:		libsm/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

LIB700_C :=		bitrev.c ctype.c ispow2.c mangle.c micons.c tolower.c toupper.c

LIB700_S :=		aldiv.s almul.s alrem.s blkfill.s blkmove.s finalone.s jumpto.s \
				ldiv.s lmul.s lrem.s rand24.s setjmp.s uldiv.s

LIB700_CO :=	$(LIB700_C:.c=.o)
LIB700_SO :=	$(LIB700_S:.s=.o)

LIB700_SRC :=	$(LIB700_C:%=lib700/%) $(LIB700_S:%=lib700/%)
LIB700_OBJ :=	$(LIB700_CO:%=build/%) $(LIB700_SO:%=build/%)

build/%.o:		lib700/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

build/%.o:		lib700/%.s $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_ASM) -c -o $@ $<

VLIB_C := 		cg2.c cg3.c glcinit.c lseg.c vbfill4.c vclrs.c vhinit.c vmput.c \
				vobjfns.c vputs.c vputsv.c vsetpal.c vsinit.c vspray4.c vtext.c \
				vwputm.c

VLIB_S :=		acctrl.s glcplot.s tsplot4.s vbank.s vclrav.s vcputs.s vcputsv.s \
				viint.s vputa.s vputc.s vputcv.s vputp.s vsetav.s vsetcv.s vsplot4.s \
				vvputsv.s vwputp.s vwputs.s

VLIB_CO :=		$(VLIB_C:.c=.o)
VLIB_SO :=		$(VLIB_S:.s=.o)

VLIB_SRC :=		$(VLIB_C:%=vlib/%) $(VLIB_S:%=vlib/%)
VLIB_OBJ :=		$(VLIB_CO:%=build/%) $(VLIB_SO:%=build/%)

build/%.o:		vlib/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

build/%.o:		vlib/%.s $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_ASM) -c -o $@ $<

all:			$(PROLOG_OBJ) $(IOLIB_OBJ) $(LIBCIO_OBJ) $(LIBSM_OBJ) $(LIB700_OBJ) \
				$(VLIB_OBJ)

ROM_C :=		booter.c romp.c
ROM_S :=		bios.s timeint.s

ROM_CO :=		$(ROM_C:.c=.o)
ROM_SO :=		$(ROM_S:.s=.o)

ROM_SRC :=		$(ROM_C:%=rom/%) $(ROM_S:%=rom/%)
ROM_OBJ :=		$(ROM_CO:%=build/%) $(ROM_SO:%=build/%)

build/%.o:		rom/%.c $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_COM) -c -o $@ $<

build/%.o:		rom/%.s $(HEADERS) | build
				$(CROSS_GCC) $(FLAGS_ASM) -c -o $@ $<

all:			$(PROLOG_OBJ) $(IOLIB_OBJ) $(LIBCIO_OBJ) $(LIBSM_OBJ) $(LIB700_OBJ) \
				$(VLIB_OBJ) $(ROM_OBJ)

build:
				mkdir build

hatari/c.img:	$(wildcard hatari/c/bin/*)
				rm -f hatari/c.img
				atari-hd-image 8 hatari/c.img BUCHLA hatari/c

emu:			hatari/c.img
				hatari \
				--control-socket /tmp/buchla.sock \
				--vdi-width 1280 --vdi-height 960 \
				--drive-a false --drive-b false \
				--acsi 0=hatari/c.img \
				--harddrive hatari/d --gemdos-drive d

rem:
				hatari/rem.py

clean:
				rm -rf build
				rm -f hatari/c.img
				rm -f hatari/d/out/*