UNAME=$(shell uname)
DEBUG=1
INSTALL=install
MAKE=make
GIT_VERSION=$(shell git describe --tags --always)
VERSION=$(shell git describe --tags --abbrev=0)

CFLAGS += -std=c99
CFLAGS += -pipe
CFLAGS += -Wall
CFLAGS += -Wunused
CFLAGS += -Iinclude
CFLAGS += -I/usr/local/include
CFLAGS += -DI3_VERSION=\"${GIT_VERSION}\"

LDFLAGS += -lm
LDFLAGS += -lxcb-wm
#LDFLAGS += -lxcb-keysyms
LDFLAGS += -lxcb-xinerama
LDFLAGS += -lX11
LDFLAGS += -L/usr/local/lib -L/usr/pkg/lib

ifeq ($(UNAME),NetBSD)
# We need -idirafter instead of -I to prefer the system’s iconv over GNU libiconv
CFLAGS += -idirafter /usr/pkg/include
LDFLAGS += -Wl,-rpath,/usr/local/lib -Wl,-rpath,/usr/pkg/lib
endif

ifeq ($(UNAME),Linux)
CFLAGS += -D_GNU_SOURCE
endif

ifeq ($(DEBUG),1)
# Extended debugging flags, macros shall be available in gcc
CFLAGS += -gdwarf-2
CFLAGS += -g3
else
CFLAGS += -O2
endif

# Don’t print command lines which are run
.SILENT:

# Always remake the following targets
.PHONY: install clean dist distclean

# Depend on the object files of all source-files in src/*.c and on all header files
FILES=$(patsubst %.c,%.o,$(wildcard src/*.c))
HEADERS=$(wildcard include/*.h)

# Depend on the specific file (.c for each .o) and on all headers
src/%.o: src/%.c ${HEADERS}
	echo "CC $<"
	$(CC) $(CFLAGS) -c -o $@ $<

all: ${FILES}
	echo "LINK i3"
	$(CC) -o i3 ${FILES} $(LDFLAGS)

install: all
	$(INSTALL) -d -m 0755 $(DESTDIR)/usr/bin
	$(INSTALL) -d -m 0755 $(DESTDIR)/etc/i3
	$(INSTALL) -m 0755 i3 $(DESTDIR)/usr/bin/
	test -e $(DESTDIR)/etc/i3/config || $(INSTALL) -m 0644 i3.config $(DESTDIR)/etc/i3/config

dist: clean
	[ ! -f i3-${VERSION} ] || rm -rf i3-${VERSION}
	[ ! -e i3-${VERSION}.tar.bz2 ] || rm i3-${VERSION}.tar.bz2
	mkdir i3-${VERSION}
	cp Makefile DEPENDS GOALS LICENSE PACKAGE-MAINTAINER TODO i3.config i3-${VERSION}
	cp -r src include docs man i3-${VERSION}
	tar cf i3-${VERSION}.tar i3-${VERSION}
	bzip2 -9 i3-${VERSION}.tar
	rm -rf i3-${VERSION}

clean:
	rm -f src/*.o
	$(MAKE) -C docs clean
	$(MAKE) -C man clean

distclean: clean
	rm -f i3