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some Makefile dependency fixes
Merge of master-melb:xfs-cmds:26405a by kenmcd.

  use depend flags for makedepend and if we are not using a .dep file
  then make the objects depend on the headers.

#
# Copyright (c) 1999, 2001-2003 Silicon Graphics, Inc.  All Rights Reserved.
#
ifndef _BUILDRULES_INCLUDED_
_BUILDRULES_INCLUDED_ = 1

include $(TOPDIR)/include/builddefs

clean clobber : $(SUBDIRS)
	rm -f $(DIRT)
	@rm -fr .libs
	$(SUBDIRS_MAKERULE)

# Never blow away subdirs
ifdef SUBDIRS
.PRECIOUS: $(SUBDIRS)
$(SUBDIRS):
	$(SUBDIRS_MAKERULE)
endif

#
# Standard targets
#

ifdef LTCOMMAND
$(LTCOMMAND) : $(SUBDIRS) $(OBJECTS) $(LTDEPENDENCIES)
	$(LTLINK) -o $@ $(LDFLAGS) $(OBJECTS) $(LDLIBS)
endif

ifdef LTLIBRARY
$(LTLIBRARY) : $(SUBDIRS) $(LTOBJECTS)
	$(LTLINK) $(LTLDFLAGS) -o $(LTLIBRARY) $(LTOBJECTS) $(LTLIBS)

%.lo: %.c
	$(LTCOMPILE) -c $<
endif

ifdef LINGUAS
%.pot: $(XGETTEXTFILES)
	xgettext --omit-header --language=C --keyword=_ -o $@ $(XGETTEXTFILES)

%.po:
	$(MSGMERGE) -o $@.tmpo $@ $(PKG_NAME).pot
	@if ! diff $@.tmpo $@ >/dev/null; then \
		echo "$@ is out of date, see $@.tmpo"; \
	fi

%.mo: %.po
	$(MSGFMT) -o $@ $<
endif

source :
	$(SOURCE_MAKERULE)

endif # _BUILDRULES_INCLUDED_

$(_FORCE):

.PHONY : depend

depend : $(CFILES) $(HFILES)
	$(SUBDIRS_MAKERULE)
	touch .dep
	$(MAKEDEPEND) $(DEPENDFLAGS) -f - -- $(CFLAGS) -- $(CFILES) | \
	$(SED) -e 's,`pwd`,$(TOPDIR),g' \
	    -e 's,  */[^ ]*,,g' \
	    -e '/^[^ ]*: *$$/d' \
	    -e '/^#.*/d' -e '/^ *$$/d' \
	> .dep
	test -s .dep || rm -f .dep

# Include dep, but only if it exists
ifeq ($(shell test -f .dep && echo .dep), .dep)
include .dep
else
$(OBJECTS): $(HFILES)
endif