ifndef CPU
    CPU=x86
endif

ifeq ($(CPU),x86)
    CPUDEFINES=-DPLATFORM_X86
    CPUFLAGS=-m32
    CPULDFLAGS=-melf_i386
    CPUASFLAGS=-32
    CPUNASMFLAGS=-felf32
endif

ifeq ($(CPU),x64)
    CPU=x64
    CPUDEFINES=-DPLATFORM_X64
    CPUFLAGS=-fPIC -m64
    CPULDFLAGS=-melf_x86_64
    CPUASFLAGS=-64
    CPUNASMFLAGS=-felf64
    LIBMAXSI_NO_SHARED=1 # This doesn't work yet
endif

DEFINES=-DLIBMAXSI_LIBRARY -DSORTIX $(CPUDEFINES)
FLAGSRELEASE=-O2
FLAGSDEBUG=-O2
FLAGS=$(CPUFLAGS) -std=gnu++0x -Wall -Wextra -nostdlib -fno-builtin -nostartfiles -nodefaultlibs -fno-exceptions -fno-stack-protector -nostdinc $(FLAGSRELEASE) $(DEFINES)
LDFLAGS=$(CPULDFLAGS)
ASFLAGS=$(CPUASFLAGS)
NASMFLAGS=$(CPUNASMFLAGS)

COBJS=\
c/ctype.o \
c/file.o \
c/fdio.o \
c/stdio.o \

CHEADERS=\
c/h/ctype.h \
c/h/unistd.h \
c/h/stdlib.h \
c/h/wchar.h \
c/h/stddef.h \
c/h/fcntl.h \
c/h/stdarg.h \
c/h/wctype.h \
c/h/features.h \
c/h/string.h \
c/h/errno.h \
c/h/error.h \
c/h/sys/readdirents.h \
c/h/sys/stat.h \
c/h/sys/types.h \
c/h/sys/wait.h \
c/h/stdio.h \
c/h/signal.h \
c/h/stdint.h \

COMMONOBJS=c++.o memory.o heap.o string.o error.o format.o
SORTIXOBJS:=$(addprefix sortix/,$(COMMONOBJS))
LIBMAXSIOBJS:=$(COMMONOBJS) \
sortix-keyboard.o \
sortix-sound.o \
process.o \
thread.o \
io.o \
init.o \
signal.o \
$(CPU)/signal.o \
start.o \
time.o \
random.o \
integer.o

MAXSIHEADERS=\
error.h \
io.h \
memory.h \
platform.h \
string.h \
syscall.h \
thread.h \
process.h \
types.h \
format.h \
keyboard.h \
sortedlist.h \
signal.h \
signalnum.h \
sortix-vga.h \
sortix-keyboard.h \
sortix-sound.h \

OBJS:=$(LIBMAXSIOBJS)
BINS:=

ifndef LIBMAXSI_NO_SHARED
    BINS:=$(BINS) libmaxsi.so
endif

ifndef LIBMAXSI_NO_STATIC
    BINS:=$(BINS) libmaxsi.a
endif

ifndef LIBMAXSI_NO_SORTIX
    BINS:=$(BINS) libmaxsi-sortix.a
endif

ifndef LIBMAXSI_NO_LIBC
    OBJS:=$(OBJS) $(COBJS)
    ifndef LIBMAXSI_NO_SHARED
         BINS:=$(BINS) libc.so
    endif
    ifndef LIBMAXSI_NO_STATIC
         BINS:=$(BINS) libc.a
    endif

    HEADERS:=$(MAXSIHEADERS) $(CHEADERS)

else
    DEFINES:=$(DEFINES) -DLIBMAXSI_NO_LIBC
endif

CFLAGS:=$(FLAGS) -std=c99 -Ic/h -I..
CXXFLAGS:=$(FLAGS) -nostdinc++ -fno-rtti -I.. -Ic/h
SORTIXFLAGS:=$(CXXFLAGS) -DSORTIX_KERNEL -I..  -I../..

all: $(BINS)

libmaxsi.a: $(OBJS)
	ar rcs libmaxsi.a $(OBJS)

libmaxsi.so: $(OBJS)
	ld $(LDFLAGS) -shared -o $@ $(OBJS)

libmaxsi-sortix.a: $(SORTIXOBJS)
	ar rcs libmaxsi-sortix.a $(SORTIXOBJS)

libc.a: libmaxsi.a
	ln -sf $< $@ 

libc.so: libmaxsi.so
	ln -sf $< $@ 

start.o: $(CPU)/start.o
	ln -sf $< $@ 

# libmaxsi

*.cpp: $(HEADERS)

%.o: %.cpp
	g++ -c $< -o $@ $(CXXFLAGS)
	
%.h: hsrc/%.h
	echo "/* WARNING: This header is generated - edits will be lost! */" > $@
	mxmpp -I decl $< >> $@

%.o: %.s
	as $(ASFLAGS) $< -o $@

%.o: %.asm
	nasm $(CPUNASMFLAGS) $< -o $@

# libc

c/*.c: $(CHEADERS)

c/%.o: c/%.c
	gcc -c $< -o $@ $(CFLAGS)

c/h/%.h: c/hsrc/%.h
	mkdir -p c/h
	mkdir -p c/h/sys
	echo "/* WARNING: This header is generated - edits will be lost! */" > $@
	mxmpp -I decl -I c/decl $< >> $@

# libmaxsi-sortix

sortix/*.cpp: $(HEADERS)

sortix/%.o: %.cpp $(HEADERS)
	g++ -c $< -o $@ $(SORTIXFLAGS)

sortix/%.o: sortix/%.cpp
	g++ -c $< -o $@ $(SORTIXFLAGS)

clean:
	rm -f *.o sortix/*.o c/*.o x86/*.o x64/*.o *.a *.so $(CHEADERS) $(HEADERS)

# Installation into sysroot
install:
	mkdir -p $(SYSROOT)/usr/lib
	for F in $(BINS); do cp --preserve=links $$F $(SYSROOT)/usr/lib || exit $?; done
	mkdir -p $(SYSROOT)/usr/include
	for F in $(CHEADERS); do F=`echo $$F | sed 's/c\/h\///g'`; mkdir -p $(SYSROOT)/usr/include/`dirname $$F`; cp c/h/$$F $(SYSROOT)/usr/include/$$F || exit $?; done
	mkdir -p $(SYSROOT)/usr/include/libmaxsi
	for F in $(MAXSIHEADERS); do cp $$F $(SYSROOT)/usr/include/libmaxsi || exit $?; done
	cp start.o $(SYSROOT)/usr/lib/crtbegin.o
	touch deleteme.cpp
	g++ $(CPUFLAGS) -c deleteme.cpp -o deleteme.o
	for F in crt0.o crtn.o crt1.o crtend.o crtbeginT.o crti.o; do cp deleteme.o $(SYSROOT)/usr/lib/$$F; done
	rm -f deleteme.o deleteme.cpp