DEFAULT_HOST!=../default-host.sh
HOST?=DEFAULT_HOST
HOSTARCH!==../target-to-arch.sh $(HOST)

CFLAGS?=-O2 -g
CPPFLAGS?=
LDFLAGS?=
LIBS?=

DESTDIR?=
PREFIX?=/usr/local
EXEC_PREFIX?=$(PREFIX)
INCLUDEDIR?=$(PREFIX)/include
LIBDIR?=$(EXEC_PREFIX)/lib

CFLAGS:=$(CFLAGS) -ffreestanding -Wall -Wextra
CPPFLAGS:=$(CPPFLAGS) -D__is_libc -Iinclude
LIBK_CFLAGS:=$(CFLAGS)
LIBK_CPPFLAGS:=$(CPPFLAGS) -D__is_libk

ARCHDIR=arch/$(HOSTARCH)

include $(ARCHDIR)/make.config

CFLAGS:=$(CFLAGS) $(ARCH_CFLAGS)
CPPFLAGS:=$(CPPFLAGS) $(ARCH_CPPFLAGS)
LIBK_CFLAGS:=$(LIBK_CFLAGS) $(KERNEL_ARCH_CFLAGS)
LIBK_CPPFLAGS:=$(LIBK_CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)

FREEOBJS=\
$(ARCH_FREEOBJS)\
stdio/printf.o\
stdio/putchar.o\
stdio/puts.o\
stdlib/abort.o\
string/memcmp.o\
string/memcpy.o\
string/memmove.o\
string/memset.o\
string/strlen.o\

HOSTEDOBJS=\
$(ARCH_HOSTEDOBJS)\

OBJS=\
$(FREEOBJS)\
$(HOSTEDOBJS)\

LIBK_OBJS=$(FREEOBJS:.o=.libk.o)

BINARIES=libk.a

.PHONY: all clean install install-headers install-libs
.SUFFIXES: .o .libk.o .c .s

all: $(BINARIES)

libc.a: $(OBJS)
		$(AR) rcs $@ $(OBJS)
libk.a: $(LIBK_OBJS)
		$(AR) rcs $@ $(LIBK_OBJS)
		
.c.o:
		$(CC) -MD -c $< -o $@ -std=gnull $(CFLAGS) $(CPPFLAGS)
		
.c.s:
		$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)
.c.libk.o:
		$(CC) -MD -c $< -o $@ -std=gnull $(LIBK_CFLAGS) $(LIBK_CPPFLAGS)
.s.libk.o:
		$(CC) -MD -c $< -o $@ $(LIBK_CFLAGS) $(LIBK_CPPFLAGS)
		
clean:	
		rm -f $(BINARIES) *.a
		rm -f $(OBJS) $(LIBK_OBJS) *.o */*.o */*/*.o
		rm -f $(OBJS:.o=.d) $(LIBK_OBJS:.o=.d) *.d */*.d */*/*.d
		
install: install-headers install-libs

install-headers: 
		mkdir -p $(DESTDIR)$(INCLUDEDIR)
		cp -R --preserve-timestamps include/. $(DESTDIR)$(INCLUDEDIR)/.
install-libs: $(BINARIES)
		mkdir -p $(DESTDIR)$(LIBDIR)
		cp $(BINARIES) $(DESTDIR) $(LIBDIR)

-include $(OBJS:.o=.d)
-include $(LIBK_OBJS:.o=.d)