## am/reconfig.am: Makefile fragment to reconfigure a directory.
##
## Copyright (C) 2013 Peter Breitenlohner <tex-live@tug.org>
## You may freely use, modify and/or distribute this file.
##
## requires $(reconfig_prereq) and DISTCLEANFILES.
##
## Serialize concurrent reconfig attempts
## Compare Automake manual (info Automake) 27.9: Multiple Outputs
##
config.force: $(reconfig_prereq)
	@if test -f $@; then :; else \
	  trap 'rm -rf reconfig.lock' 1 2 13 15; \
	  if mkdir reconfig.lock 2>/dev/null; then \
	    echo timestamp >$@; \
	    $(SHELL) ./config.status --recheck; \
	    rmdir reconfig.lock; \
	  else \
	    while test -d rebuild.lock && test -z "$$dry"; do sleep 1; done; \
	    test -f $@; \
	  fi; \
	fi

DISTCLEANFILES += config.force