# -*- 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)

# Duplicate for rs
$(PROGS_RS): CPPFLAGS += -I$(SRCDIR)/lib/user -I.
$(PROGS_RS): LDFLAGS = -nostdlib -static -Wl,-T,$(LDSCRIPT)
$(PROGS_RS): LDSCRIPT = $(SRCDIR)/lib/user/user.lds
# filst04@liu 2014-01: Added to ignore the build-id located at offset 0.
$(PROGS_RS): 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_ENTRY = lib/user/entry.o
LIB = $(LIB_ENTRY) libc.a

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) $(PROGS_RS)

# 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): $$($(1)_OBJ) $$(LIB) $$(LDSCRIPT)
	$$(CC) $$(LDFLAGS) $$($(1)_OBJ) $$(LIB) -o $$@
endef

define TEMPLATE_RS
lib$(1).a:
	(cd $$($(1)_SRC) && cargo build)
	cp $$($(1)_SRC)/target/debug/lib$(1).a .
.PHONY: lib$(1).a
$(1): rust.o lib$(1).a $$(LIB_RUST) $$(LDSCRIPT)
	$$(CC) $$(LDFLAGS) $$(LIB_ENTRY) rust.o lib$(1).a -o $$@
endef

$(foreach prog,$(PROGS),$(eval $(call TEMPLATE,$(prog))))
$(foreach prog,$(PROGS_RS),$(eval $(call TEMPLATE_RS,$(prog))))

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

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

.PHONY: all clean

-include $(LIB_DEP) $(PROGS_DEP)