# -*- makefile -*-

$(PROGS): CPPFLAGS += -I$(SRCDIR)/lib/user -I.

# Linker flags.
$(PROGS): LDFLAGS = -nostdlib -static -Wl,-T,$(LDSCRIPT)
$(PROGS): LDSCRIPT = $(SRCDIR)/lib/user/user.lds
# filst04@liu 2014-01: Added to ignore the build-id located at offset 0.
$(PROGS): LDFLAGS += $(LDFLAG_BUILD_ID)

# Library code shared between kernel and user programs.
lib_SRC  = lib/debug.c			# Debug code.
lib_SRC += lib/random.c			# Pseudo-random numbers.
lib_SRC += lib/stdio.c			# I/O library.
lib_SRC += lib/stdlib.c			# Utility functions.
lib_SRC += lib/string.c			# String functions.
lib_SRC += lib/arithmetic.c

# User level only library code.
lib/user_SRC  = lib/user/debug.c	# Debug helpers.
lib/user_SRC += lib/user/syscall.c	# System calls.
lib/user_SRC += lib/user/console.c	# Console code.

LIB_OBJ = $(patsubst %.c,%.o,$(patsubst %.S,%.o,$(lib_SRC) $(lib/user_SRC)))
LIB_DEP = $(patsubst %.o,%.d,$(LIB_OBJ))
LIB = lib/user/entry.o libc.a
LIB_RUST = lib/user/entry.o librust.a

LIBDIR_RUST = $(SRCDIR)/../rust

PROGS_SRC = $(foreach prog,$(PROGS),$($(prog)_SRC))
PROGS_OBJ = $(patsubst %.c,%.o,$(patsubst %.S,%.o,$(PROGS_SRC)))
PROGS_DEP = $(patsubst %.o,%.d,$(PROGS_OBJ))

all: $(PROGS)

# filst04@liu 2014-01: Needed to not break the system call functions
# on modern Linux'es, works on SunOS too
lib/user/syscall.o: CPPFLAGS += -fno-omit-frame-pointer

define TEMPLATE
$(1)_OBJ = $(patsubst %.c,%.o,$(patsubst %.S,%.o,$($(1)_SRC)))
$(1): $$($(1)_OBJ) $(2) $$(LDSCRIPT)
	$$(CC) $$(LDFLAGS) $$($(1)_OBJ) $(2) -o $$@
endef

$(foreach prog,$(PROGS),$(eval $(call TEMPLATE,$(prog),$(LIB))))
$(foreach prog,$(PROGS_RUST),$(eval $(call TEMPLATE,$(prog),$(LIB_RUST))))

libc.a: $(LIB_OBJ)
	rm -f $@
	ar r $@ $^
	ranlib $@

librust.a:
	make -C $(LIBDIR_RUST) all
	cp $(LIBDIR_RUST)/target/debug/librust.a $@

clean::
	rm -f $(PROGS) $(PROGS_OBJ) $(PROGS_DEP)
	make -C $(LIBDIR_RUST) clean
	rm -f $(LIB_DEP) $(LIB_OBJ) lib/user/entry.[do] libc.a librust.a

.PHONY: all clean librust.a

-include $(LIB_DEP) $(PROGS_DEP)