# Makefile to build x48ng without autotools
#
# The cc-option function and the C{,PP}FLAGS logic were copied from the
# fsverity-utils project.
# https://git.kernel.org/pub/scm/fs/fsverity/fsverity-utils.git/
# The governing license can be found in the LICENSE file or at
# https://opensource.org/license/MIT.

TARGETS = libx48ng.a
PREFIX = /usr
DOCDIR = $(PREFIX)/doc/x48ng
MANDIR = $(PREFIX)/man

CFLAGS ?= -g -O2
FULL_WARNINGS = no
LUA_VERSION ?= lua
PKG_CONFIG ?= pkg-config

VERSION_MAJOR = 0
VERSION_MINOR = 41
PATCHLEVEL = 0

DOTOS = src/emu_serial.o \
	src/emu_emulate.o \
	src/emu_init.o \
	src/emu_keyboard.o \
	src/emu_memory.o \
	src/emu_register.o \
	src/emu_timer.o \
	src/debugger.o \
	src/romio.o \

MAKEFLAGS +=-j$(NUM_CORES) -l$(NUM_CORES)

cc-option = $(shell if $(CC) $(1) -c -x c /dev/null -o /dev/null > /dev/null 2>&1; \
	      then echo $(1); fi)

ifeq ($(FULL_WARNINGS), no)
EXTRA_WARNING_FLAGS := -Wno-unused-function \
	-Wno-redundant-decls \
	$(call cc-option,-Wno-maybe-uninitialized) \
	$(call cc-option,-Wno-discarded-qualifiers) \
	$(call cc-option,-Wno-uninitialized) \
	$(call cc-option,-Wno-ignored-qualifiers)
endif

ifeq ($(FULL_WARNINGS), yes)
EXTRA_WARNING_FLAGS := -Wunused-function \
	-Wredundant-decls \
	-fsanitize-trap \
	$(call cc-option,-Wunused-variable)
endif

override CFLAGS := -std=c11 \
	-Wall -Wextra -Wpedantic \
	-Wformat=2 -Wshadow \
	-Wwrite-strings -Wstrict-prototypes -Wold-style-definition \
	-Wnested-externs -Wmissing-include-dirs \
	-Wdouble-promotion \
	-Wno-sign-conversion \
	-Wno-unused-variable \
	-Wno-unused-parameter \
	-Wno-conversion \
	-Wno-format-nonliteral \
	$(call cc-option,-Wjump-misses-init) \
	$(call cc-option,-Wlogical-op) \
	$(call cc-option,-Wno-unknown-warning-option) \
	$(EXTRA_WARNING_FLAGS) \
	$(CFLAGS)

override CPPFLAGS := -I./src/ -D_GNU_SOURCE=1 \
	-DVERSION_MAJOR=$(VERSION_MAJOR) \
	-DVERSION_MINOR=$(VERSION_MINOR) \
	-DPATCHLEVEL=$(PATCHLEVEL) \
	$(CPPFLAGS)

LIBS = -lm

# ### lua
# override CFLAGS += $(shell "$(PKG_CONFIG)" --cflags $(LUA_VERSION))
# LIBS += $(shell "$(PKG_CONFIG)" --libs $(LUA_VERSION))

### debugger
override CFLAGS += $(shell "$(PKG_CONFIG)" --cflags readline)
LIBS += $(shell "$(PKG_CONFIG)" --libs readline)

.PHONY: all clean clean-all pretty-code install mrproper

all: $(TARGETS)

# Binaries
libx48ng.a: $(DOTOS)
	ar rcs $@ $^

# Cleaning
clean:
	rm -f src/*.o

mrproper: clean
	rm -f $(TARGETS)
	# make -C dist/ROMs mrproper

clean-all: mrproper

# Formatting
pretty-code:
	clang-format -i src/*.c src/*.h src/legacy_tools/*.c

# Installing
# get-roms:
#	make -C dist/ROMs

# dist/config.lua: dist/x48ng
#	$^ --print-config > $@

# install: all dist/config.lua
#	install -m 755 -d -- $(DESTDIR)$(PREFIX)/bin
#	install -c -m 755 dist/x48ng $(DESTDIR)$(PREFIX)/bin/x48ng

#	install -m 755 -d -- $(DESTDIR)$(PREFIX)/share/x48ng
#	install -c -m 644 dist/hplogo.png $(DESTDIR)$(PREFIX)/share/x48ng/hplogo.png
#	cp -R dist/ROMs/ $(DESTDIR)$(PREFIX)/share/x48ng/
#	install -c -m 755 dist/setup-x48ng-home.sh $(DESTDIR)$(PREFIX)/share/x48ng/setup-x48ng-home.sh
#	chmod 755 $(DESTDIR)$(PREFIX)/share/x48ng/setup-x48ng-home.sh

#	install -m 755 -d -- $(DESTDIR)$(PREFIX)/libexec
#	install -c -m 755 dist/x48ng-dump2rom $(DESTDIR)$(PREFIX)/libexec/x48ng-dump2rom
#	install -c -m 755 dist/x48ng-checkrom $(DESTDIR)$(PREFIX)/libexec/x48ng-checkrom

#	install -m 755 -d -- $(DESTDIR)$(MANDIR)/man1
#	sed "s|@VERSION@|$(VERSION_MAJOR).$(VERSION_MINOR).$(PATCHLEVEL)|g" dist/x48ng.man.1 > $(DESTDIR)$(MANDIR)/man1/x48ng.1

#	install -m 755 -d -- $(DESTDIR)$(DOCDIR)
#	cp -R AUTHORS LICENSE README* doc* romdump/ $(DESTDIR)$(DOCDIR)
#	install -c -m 644 dist/config.lua $(DESTDIR)$(DOCDIR)/config.lua

#	install -m 755 -d -- $(DESTDIR)$(PREFIX)/share/applications
#	sed "s|@PREFIX@|$(PREFIX)|g" dist/x48ng.desktop > $(DESTDIR)$(PREFIX)/share/applications/x48ng.desktop