CROSS_COMPILE  = arm-nickel-linux-gnueabihf-
MOC            = moc
CC             = $(CROSS_COMPILE)gcc
CXX            = $(CROSS_COMPILE)g++
PKG_CONFIG     = $(CROSS_COMPILE)pkg-config
STRIP          = $(CROSS_COMPILE)strip

DESTDIR =

ifneq ($(if $(MAKECMDGOALS),$(if $(filter-out clean gitignore install koboroot,$(MAKECMDGOALS)),YES,NO),YES),YES)
 $(info -- Skipping configure)
else
PTHREAD_CFLAGS := -pthread
PTHREAD_LIBS   := -pthread

define pkgconf =
 $(if $(filter-out undefined,$(origin $(1)_CFLAGS) $(origin $(1)_LIBS)) \
 ,$(info -- Using provided CFLAGS and LIBS for $(2)) \
 ,$(if $(shell $(PKG_CONFIG) --exists $(2) >/dev/null 2>/dev/null && echo y) \
  ,$(info -- Found $(2) ($(shell $(PKG_CONFIG) --modversion $(2))) with pkg-config) \
   $(eval $(1)_CFLAGS := $(shell $(PKG_CONFIG) --silence-errors --cflags $(2))) \
   $(eval $(1)_LIBS   := $(shell $(PKG_CONFIG) --silence-errors --libs $(2))) \
   $(if $(3) \
   ,$(if $(shell $(PKG_CONFIG) $(3) $(2) >/dev/null 2>/dev/null && echo y) \
    ,$(info .. Satisfies constraint $(3)) \
    ,$(info .. Does not satisfy constraint $(3)) \
     $(error Dependencies do not satisfy constraints)) \
   ,) \
  ,$(info -- Could not automatically detect $(2) with pkg-config. Please specify $(1)_CFLAGS and/or $(1)_LIBS manually) \
   $(error Missing dependencies)))
endef

$(call pkgconf,QT5CORE,Qt5Core)
$(call pkgconf,QT5WIDGETS,Qt5Widgets)

CFLAGS   ?= -O2 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=hard -mthumb
CXXFLAGS ?= -O2 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=hard -mthumb
LDFLAGS  ?= -Wl,--as-needed

override CFLAGS   += -std=gnu11 -Wall -Wextra -Werror
override CXXFLAGS += -std=gnu++11 -Wall -Wextra -Werror
override LDFLAGS  += -Wl,--no-undefined -Wl,-rpath,/usr/local/Kobo -Wl,-rpath,/usr/local/Qt-5.2.1-arm/lib

NM_VERSION := $(shell git describe --tags --always --dirty)
# Only use it if we got something useful out of git describe...
ifdef NM_VERSION
 override CPPFLAGS += -DNM_VERSION='"$(NM_VERSION)"'
endif

ifeq ($(NM_UNINSTALL_CONFIGDIR),1)
 $(info -- NM_UNINSTALL_CONFIGDIR... enabled)
 override CPPFLAGS += -DNM_UNINSTALL_CONFIGDIR
else
 $(info -- NM_UNINSTALL_CONFIGDIR... disabled)
endif
endif

define GITIGNORE_HEAD
# make gitignore

# KDevelop
.kdev4/
NickelMenu.kdev4
.kateconfig

# VSCode
.vscode/

# clangd
compile_flags.txt

# Build artifacts
endef
export GITIGNORE_HEAD

all: src/libnm.so

strip: src/libnm.so
	$(STRIP) --strip-unneeded $(CURDIR)/src/libnm.so

clean:
	rm -f $(GENERATED)

gitignore:
	echo "$${GITIGNORE_HEAD}" > .gitignore
	echo '$(GENERATED)' | \
		sed 's/ /\n/g' | \
		sed 's/^./\/&/' >> .gitignore

install:
	install -Dm644 src/libnm.so $(DESTDIR)/usr/local/Kobo/imageformats/libnm.so
	install -Dm644 res/doc $(DESTDIR)/mnt/onboard/.adds/nm/doc

koboroot:
	tar cvzf KoboRoot.tgz --show-transformed --owner=root --group=root --mode="u=rwX,go=rX" --transform="s,src/libnm.so,./usr/local/Kobo/imageformats/libnm.so," --transform="s,res/doc,./mnt/onboard/.adds/nm/doc," src/libnm.so res/doc

.PHONY: all strip clean gitignore install koboroot
override GENERATED += KoboRoot.tgz

src/libnm.so: override CFLAGS   += $(PTHREAD_CFLAGS) -fvisibility=hidden -fPIC
src/libnm.so: override CXXFLAGS += $(PTHREAD_CFLAGS) $(QT5CORE_CFLAGS) $(QT5WIDGETS_CFLAGS) -fvisibility=hidden -fvisibility-inlines-hidden -fPIC
src/libnm.so: override LDFLAGS  += $(PTHREAD_LIBS) $(QT5CORE_LIBS) $(QT5WIDGETS_LIBS) -ldl -Wl,-soname,libnm.so
src/libnm.so: src/qtplugin.o src/init.o src/config.o src/dlhook.o src/failsafe.o src/menu.o src/kfmon.o src/action.o src/action_c.o src/action_cc.o src/generator.o src/generator_c.o src/util.o

override LIBRARIES += src/libnm.so
override MOCS      += src/qtplugin.moc

define patw =
 $(foreach dir,src res,$(dir)/*$(1))
endef
define rpatw =
 $(patsubst %$(1),%$(2),$(foreach w,$(call patw,$(1)),$(wildcard $(w))))
endef

$(LIBRARIES): src/%.so:
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -shared -o $@ $^ $(LDFLAGS)
$(MOCS): %.moc: %.h
	$(MOC) $< -o $@
$(patsubst %.moc,%.o,$(MOCS)): %.o: %.moc
	$(CXX) -xc++ $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@
$(call rpatw,.c,.o): %.o: %.c
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
$(call rpatw,.cc,.o): %.o: %.cc
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@

override GENERATED += $(LIBRARIES)  $(MOCS) $(patsubst %.moc,%.o,$(MOCS)) $(call rpatw,.c,.o) $(call rpatw,.cc,.o)