# Make the TAGS files.

# Copyright (C) 1992, 1994, 1995, 1996, 1998 Free Software Foundation, Inc.
# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License
# as published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.

# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB.  If not,
# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.

# Make this the default goal.
TAGS:

ifdef subdir
.. := ../
endif

include $(..)Makeconfig

ifndef tags_sources
ifeq ($(subdir),ctype)
# In most cases, we want the C source files to come before
# the header files so tags for optimizing #define's in the
# headers won't be put in the tags files, but for ctype,
# the functions are just backup for the #define's in the header.
tags_sources = $(all-headers) $(all-sources) $(all-dist)
else	# Not ctype.
tags_sources = $(all-sources) $(all-headers) $(all-dist)
endif	# ctype
endif	# No tags_sources

sysdep-dirs := $(full-config-sysdirs)

ifndef sysdep_dirs
# Find all sysdep directories.
sysdep_dirs := $(shell find $(..)sysdeps \
			    $(wildcard \
				$(patsubst %,$(..)%/sysdeps,$(add-ons))) \
			    -type d ! -name RCS ! -name CVS -print)
endif

# Find all sysdep dirs there are, but putting the ones
# we are configured to use first and preserving their order.
all-dirs := $(subdir-dirs) \
	    $(objdir) \
	    $(sysdep-dirs) \
	    $(source_dirs) \
	    $(filter-out $(sysdep-dirs),$(sysdep_dirs))

# Find all the subdirs there are, but putting the ones
# we are configured to use first and preserving their order.
ifndef subdir
subdirs := $(subdirs) \
	   $(filter-out $(subdirs),\
			$(shell sed -e 's/\#.*$$//' \
				    $(wildcard $(addsuffix /Subdirs,\
							   $(all-dirs)))\
				    /dev/null))
all-dist = $(foreach Dist,$(wildcard $(all-dirs:%=%/Dist)),\
		     $(addprefix $(Dist:%/Dist=%)/,\
				 $(filter %.c %.h %.S %.s,\
					  $(shell cat $(Dist)))))
tags_sources = $(all-sources) $(all-headers) $(all-dist)
else
all-dist = $(distribute)
endif

# sources and headers must be simply expanded variables
sources := $(sources) $(filter %.c %.s %.S,$(all-dist))
headers := $(headers) $(filter %.h,$(all-dist))
all-dist := $(filter-out %.h %.c %.s %.S,$(all-dist))

sources += $(foreach lib,$(extra-libs),$($(lib)-routines:=.c))

# All different versions of $(sources), preserving the configured sysdep
# directory order.
# Files that are found in the current directory cannot occur in
# sysdep directories, so don't bother searching them.
sysdep-sources := $(filter-out $(wildcard $(sources)), $(sources))
all-sources = $(wildcard $(sort $(sources) $(sources:.c=.S) $(sources:.c=.s)  \
				$(others:=.c) $(tests:=.c) $(test-srcs:=.c))) \
	      $(foreach dir,$(all-dirs),\
			$(wildcard \
			   $(addprefix $(dir)/,\
				       $(sort $(sysdep-sources) \
					      $(sysdep-sources:.c=.S) \
					      $(sysdep-sources:.c=.s)))))

sysdep-headers := $(filter-out $(wildcard $(headers)), $(headers))
all-headers = $(wildcard $(headers)) \
	      $(foreach dir,$(all-dirs),\
			$(wildcard $(addprefix $(dir)/,$(sysdep-headers))))

tags_sources := $(strip $(tags_sources))

TAGS: $(tags_sources)
ifdef subdir
ifdef tags_sources
	$(ETAGS) -o $@ $^
else
# No sources.  Create a dummy file.
	touch $@
endif # tags_sources
else # parent
TAGS: subdir_TAGS
# Note that this uses the -i switch, and thus requires v19 etags.
	$(ETAGS) -o $@ \
		 $(subdirs:%=-i %/TAGS) \
		 $(filter-out subdir_TAGS,$^)

.PHONY: subdir_TAGS $(subdirs:%=%/TAGS)
subdir_TAGS: $(subdirs:%=%/TAGS)
$(subdirs:%=%/TAGS):
	$(MAKE) -C $(@D) no_deps=t $(@F)

endif # subdir

ifndef XGETTEXT
XGETTEXT = xgettext
endif

P = $(..)po

ifdef subdir
domain = $(subdir)
else
domain = libc-top
endif

define extract
@rm -f $@.new
$(XGETTEXT) --keyword=_ --keyword=N_ --add-comments=TRANS  --sort-output \
	    --omit-header -n -d - $(XGETTEXTFLAGS-$(@F)) > $@.new $^
mv -f $@.new $@
endef

text-srcs := $(filter %.c %.h %.cc %.C,$(tags_sources))
$P/$(domain).pot: $(text-srcs)
ifeq (,$(text-srcs))
	cp /dev/null $@
else
	$(extract)
endif

all-pot = $P/libc-top.pot $P/subdirs.pot

ifndef subdir
# Collect all the subdir messages, massaging the file names in comments
# to include the subdir name.
$P/subdirs.pot: $(subdirs:%=$P/%.pot)
	@rm -f $@.new
	(for d in $(subdirs); \
	 do sed "/^#:/s% % $$d/%g" $P/$$d.pot; done) > $@.new
	mv -f $@.new $@

# Get $(version) defined.
include $(common-objpfx)version.mk

# Combine all the messages into the final sorted template translation file.
# The following code requires GNU date.
$P/libc.pot: $(all-pot)
	@rm -f $@.new
	set `date -R`; disp="$$6"; \
	sed -e 's/VERSION/$(version)/' \
	    -e "s/DATE/`date +'%Y-%m-%d %H:%M'$$disp`/" \
	    po/header.pot > $@.new
	$(XGETTEXT) -d - --omit-header -n -s $^ >> $@.new
	mv -f $@.new $@
ifeq ($(with-cvs),yes)
	test ! -d CVS || cvs $(CVSOPTS) ci -m'Regenerated from source files' $@
endif

$(subdirs:%=$P/%.pot): $P/%.pot: FORCE
	$(MAKE) -C $* no_deps=t ../$@
FORCE:
endif
