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# -*- Makefile -*-
#
# Copyright 2009 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
STAMPS ?=
EXTRA_DIST ?=
MOSTLYCLEANFILES ?=
## ----------------------------------------------------------------
## Special rules for generating sources. Include this file when there
## are multiple targets ('gen_sources') being created using a single
## command. In this case, parallel build protection is required, and
## is provided by this file using a reasonably generic ruleset. For
## more info, see:
##
## http://sources.redhat.com/automake/automake.html#Multiple-Outputs
##
## If a single source is being created, then normal rules can be used;
## using this parallel protection will not hurt, but it also won't help.
##
## Define the variable 'par_gen_command' to be the command that
## creates the sources 'gen_sources' from the dependency files
## 'gen_sources_deps'.
##
## These STAMPS will be removed upon "make clean", but are otherwise
## not used.
STAMPS += $(DEPDIR)/stamp-sources-generate*
## The following STAMP will be included in the archive, to show that
## this these rules have been followed.
EXTRA_DIST += stamp-sources-generate
MOSTLYCLEANFILES += stamp-sources-generate
stamp-sources-generate: $(gen_sources_deps)
@rm -f $(DEPDIR)/stamp-sources-generate-tmp
@touch $(DEPDIR)/stamp-sources-generate-tmp
$(par_gen_command)
@mv -f $(DEPDIR)/stamp-sources-generate-tmp $@
$(gen_sources): stamp-sources-generate
## Recover from the removal of $@
@if test -f $@; then :; else \
trap 'rm -rf $(DEPDIR)/stamp-sources-generate-*' 1 2 13 15; \
if mkdir $(DEPDIR)/stamp-sources-generate-lock 2>/dev/null; then \
## This code is being executed by the first process.
rm -f stamp-sources-generate; \
$(MAKE) $(AM_MAKEFLAGS) stamp-sources-generate; \
rmdir $(DEPDIR)/stamp-sources-generate-lock; \
else \
## This code is being executed by the follower processes.
## Wait until the first process is done.
while test -d $(DEPDIR)/stamp-sources-generate-lock; do sleep 1; done; \
## Succeed iff the first process succeeded.
test -f stamp-sources-generate; exit $$?; \
fi; \
fi;
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