# Makefile for gpted

PREFIX ?= /usr/local
BINDIR ?= $(PREFIX)/bin
MANDIR ?= $(PREFIX)/share/man

ifeq (,$(VERSION))
  VERSION := $(shell git rev-parse --short HEAD)
  ifneq (,$(shell git diff-index --name-only HEAD))
    VERSION := $(VERSION)-dirty
  endif
endif

CC := gcc
AR := ar
LD := gcc
CFLAGS := -g -Wall -Werror
LDFLAGS := -g

LIB_C_SRC := util.c crc32.c gpt.c
TARGET_LIB := libgpt.a

EXE_C_SRC := gpted.c
TARGET_EXE := gpted

ifeq ($(WITH_READLINE),true)
  SYSLIBS := -lreadline
else
  CFLAGS += -I.
  LIB_C_SRC += readline/readline.c
endif

LIB_C_OBJ := $(LIB_C_SRC:.c=.o)
EXE_C_OBJ := $(EXE_C_SRC:.c=.o)

C_SRC := $(LIB_C_SRC) $(EXE_C_SRC)
C_OBJ := $(LIB_C_OBJ) $(EXE_C_OBJ)

all: $(TARGET_EXE)

define cmd_c_compile
  $(CC) $(CPPFLAGS) $(CFLAGS) -MD -MP -MF .$(@F:.o=.d) -c -o $@ $<
endef
-include $(wildcard .*.d)

%.o: %.c
	$(cmd_c_compile)

verdep := $(shell grep -l "^\#include \"version\.h\"" $(C_SRC))
ifneq ($(verdep),)
$(verdep): version.h
endif

$(TARGET_EXE): $(EXE_C_OBJ) $(TARGET_LIB)
	$(LD) $(LDFLAGS) -o $@ $^ $(SYSLIBS)

$(TARGET_LIB): $(LIB_C_OBJ)
	$(AR) r $@ $^

version.h:
	@echo "/* Autogenerated file.  Do not edit. */" > .$@.tmp && \
	echo "#ifndef VERSION_H" >> .$@.tmp && \
	echo "#define PACKAGE \"$(TARGET)\"" >> .$@.tmp && \
	echo "#define VERSION \"$(VERSION)\"" >> .$@.tmp && \
	echo "#endif" >> .$@.tmp && \
	rm -f $@ && \
	mv -f .$@.tmp $@

tags: $(C_SRC)
	ctags -R

.PHONY: install
	install -D gpted $(DESTDIR)$(BINDIR)
	install -D gpted.1 $(DESTDIR)$(MANDIR)/man1

.PHONY: clean
clean:
	rm -f core .*.d readline/*.o *.o *.a gpted

.PHONY: distclean
distclean: clean
	rm -f .*.d

.PHONY: tarball
tarball: distclean
	(d=`basename $PWD`;
	 cd ..; \
	 cp -ar $d $d-$(VERSION); \
	 tar czvf $d-$(VERSION).tar.gz `find $d-$(VERSION) -type f | egrep -v "CVS|debian|\.git"`; \
	 rm -rf $d-$(VERSION); \
	 cd $(PWD);