# -*- 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;