default.rules

linux下traceroute的实现

#
#   Copyright (c) 2000, 2001, 2007	Dmitry Butskoy
#					<[e-mail]>
#   License:  GPL v2 or any later
#
#   See COPYING for the status of this software.
#

#
#   Default a target`s Makefile. Useful for any things...
#   For some changes, copy it to a dir where needed and edit that copy.
#


ifndef srcdir
rul := Make.rules
path := $(word 1, $(wildcard ../$(rul) ../../$(rul)))
ifeq ($(path),../$(rul))
srcdir = $(dir $(CURDIR))
endif
ifeq ($(path),../../$(rul))
srcdir = $(dir $(patsubst %/,%,$(dir $(CURDIR))))
TARGET = .MODULE
endif
ifeq ($(srcdir),)
$(error Cannot find srcdir (where $(rul) exists))
endif
endif

ifndef TARGET
TARGET = $(notdir $(CURDIR))
endif

include $(srcdir)/Make.rules


#
#	LIBDIRS	    DEFAULTS
#
ifeq ($(filter $(TARGET),$(LIBDIRS)),$(TARGET))

ifeq ($(shared),yes)

all: $(TARGET).so

$(TARGET).so: $(OBJS)
	$(CC) -shared -o $@ -Wl,-soname -Wl,$@ $(OBJS)

else

all: $(TARGET).a

$(TARGET).a: $(OBJS)
	rm -f $@
	$(AR) -rc $@ $(OBJS)
	$(RANLIB) $@

endif

install_what = $(wildcard $(TARGET).so $(TARGET).a)
install_dir = $(libdir)
install_includes = $(wildcard *.h)

cross_stamp_file = $(wildcard .cross:*)
ifeq ($(cross_stamp_file),)
cross_stamp = .cross:
else
cross_stamp = $(cross_stamp_file)
endif
new_stamp = .cross:$(subst $(empty) ,:,$(CROSS))
ifneq ($(cross_stamp),$(new_stamp))

$(OBJS): force

force:
	rm -f $(cross_stamp) > $(new_stamp)
	@rm -f *.o *.a *.lo *.so

endif

endif


#
#	MODDIRS	    DEFAULTS
#
ifeq ($(filter $(TARGET),$(MODDIRS)),$(TARGET))

modules = $(filter-out $(SKIPDIRS), $(patsubst %/,%,$(wildcard */)))

.PHONY: $(modules)

what = all
depend: what = depend
clean: what = clean

all depend clean: $(modules)

$(modules): mkfile = $(if $(wildcard $@/Makefile),,-f $(srcdir)/default.rules)

$(modules): force
	@$(MAKE) $(mkfile) -C $@ $(what) TARGET=.MODULE MODULE=$@

force:

install_what = $(wildcard *.so)
install_dir = $(libexecdir)

endif


#
#	MODDIRS` subdirectories (i.e., modules) defaults
#
ifeq ($(TARGET),.MODULE)

ifndef MODULE
MODULE = $(notdir $(CURDIR))
endif

ifeq ($(shared),yes)

all: ../$(MODULE).so

../$(MODULE).so: $(OBJS) $(LIBDEPS)
	$(CC) -shared -o $@ $(OBJS) $(LIBS)

else

all: ../$(MODULE).o

../$(MODULE).o: $(OBJS)
	$(LD) -r -o $@ $(OBJS)

endif

endif


#
#	EXEDIRS	    DEFAULTS	(for usual executables)
#
ifeq ($(filter $(TARGET),$(EXEDIRS)),$(TARGET))

ifeq ($(filter $(TARGET),$(MODUSERS)),$(TARGET))
MOD_OBJS = $(wildcard $(foreach dir,$(MODDIRS),$(srcdir)/$(dir)/*.o))
ifeq ($(shared),yes)
override LDFLAGS := -rdynamic $(LDFLAGS)
endif
install_includes= $(wildcard $(foreach dir,$(INCLUDEDIRS),$(srcdir)/$(dir)/*.h))
install_includes:= $(filter-out $(srcdir)/include/version.h,$(install_includes))
else
MOD_OBJS =
endif

all: $(TARGET)

$(TARGET): $(OBJS) $(MOD_OBJS) $(LIBDEPS)
	$(CC) $(LDFLAGS) -o $@ $(OBJS) $(MOD_OBJS) $(LIBS)

install_what = $(wildcard $(TARGET))
install_dir = $(if $(filter $(TARGET),$(SBINUSERS)),$(sbindir),$(bindir))

endif


#
#	Install  stuff
#

install_manuals = $(wildcard *.[0-9] *.[0-9]?)


install:
ifneq ($(install_dir),)
	@mkdir -p $(DESTDIR)$(install_dir)
endif
ifneq ($(install_what),)
	$(INSTALL) $(install_what) $(DESTDIR)$(install_dir)
endif
ifneq ($(install_includes),)
	@mkdir -p $(DESTDIR)$(includedir)
	$(INSTALL) $(install_includes) $(DESTDIR)$(includedir)
endif
	@true
ifneq ($(install_manuals),)
define inst_man
@mkdir -p $(DESTDIR)$(mandir)/man$(patsubst .%,%,$(suffix $(1)))
	cp -f $(1) $(DESTDIR)$(mandir)/man$(patsubst .%,%,$(suffix $(1)))
	
endef
	$(foreach man,$(install_manuals),$(call inst_man,$(man)))
endif