# Makefile
#
# Copyright (C) 2024 Michel Pollet <buserror@gmail.com>
#
# SPDX-License-Identifier: MIT

LIBMUI 			?= ../

# for bsd_queue.h and incbin.h
#MII 			?= $(LIBMUI)..
#CPPFLAGS		+= -I$(MII)/libmish/src -I$(MII)/contrib
CPPFLAGS		+= -I$(LIBMUI)contrib

BUILD_DIR		?= $(LIBMUI)

O 				:= $(BUILD_DIR)build-$(shell $(CC) -dumpmachine)
BIN 			:= $(O)/bin
OBJ 			:= $(O)/obj/libmui
LIB 			:= $(O)/lib

CPPFLAGS		+= -I$(LIBMUI)src
CPPFLAGS		+= -I$(LIBMUI)mui_shell
CPPFLAGS		+= ${shell pkg-config --cflags pixman-1}
LDLIBS			+= ${shell pkg-config --libs pixman-1}

MUI_VERSION		:= ${shell \
						echo $$(git describe --tags --abbrev=0 2>/dev/null || \
							echo "(dev)") \
						$$(git log -1 --date=short --pretty="%h %cd")}
CPPFLAGS		+= -DMUI_VERSION="\"$(MUI_VERSION)\""

OPTIMIZE		?= -O0 -g
CFLAGS			+= --std=gnu99 -Wall -Wextra
CFLAGS			+= $(OPTIMIZE)
CFLAGS			+= -Wno-unused-parameter -Wno-unused-function
# PIC is necessary for the shared library/plugin to work
CFLAGS 			+= -fPIC

#CFLAGS 			+= -fsanitize=address
#LDFLAGS			+= -fsanitize=address
#LDLIBS			+=

ifeq ($(V),1)
Q :=
else
Q := @
endif

# use a .temp file, otherwise the mui_shell tries to reload before the file
# is fully written, and it fails.
# the ${filter} are there to make the sure object files are linked before the .a
$(LIB)/%.so : $(OBJ)/%.o $(LIB)/libmui.a | $(O)
ifeq ($(V),)
	@echo "  LDSO      $@"
endif
	$(Q)$(CC) $(CPPFLAGS) $(CFLAGS) -shared -fPIC -o $@.temp \
			${filter %.o, $^} ${filter %.a, $^} $(LDLIBS) && \
		mv $@.temp $@

$(OBJ)/%.o		: %.c | $(OBJ)
ifeq ($(V),)
	@echo "  CC" ${filter -O%, $(CPPFLAGS) $(CFLAGS)} "$<"
endif
	$(Q)$(CC) -MMD $(CPPFLAGS) $(CFLAGS) -c -o $@ $<

$(BIN)/%			:  | $(BIN)
ifeq ($(V),)
	@echo "  LD      $@"
endif
	$(Q)$(CC) $(LDFLAGS) -o $@ $^ $(LDLIBS)

$(O) $(OBJ) $(BIN) $(LIB):
	@mkdir -p $@