# Maintainer makefile for Automake. Requires GNU make.
# Copyright (C) 2012-2017 Free Software Foundation, Inc.
# This program 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 2, or (at your option)
# any later version.
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
ifeq ($(filter bootstrap,$(MAKECMDGOALS)),)
ifeq ($(wildcard Makefile),)
# Any target but 'bootstrap' specified in an unconfigured tree
# is an error, even when the user is running GNU make.
$(warning There seems to be no Makefile in this directory.)
$(warning You must run ./configure before running 'make'.)
$(error Fatal Error)
else # ! bootstrap in $(MAKECMDGOALS)
other-targets := $(filter-out bootstrap,$(MAKECMDGOALS))
config-status := $(wildcard ./config.status)
BOOTSTRAP_SHELL ?= /bin/sh
# Allow the user (or more likely the developer) to ask for a bootstrap
# of the package.
# Two issues that must be kept in mind in the implementation below:
#  "make bootstrap" can be invoked before 'configure' is run (and in
# fact, even before it is created, if we are bootstrapping from a
# freshly-cloned checkout).
#  When re-bootstrapping an already configured tree, we must ensure
# that the automatic remake rules for Makefile and company do not
# kick in, because the tree might be in an inconsistent state (e.g.,
# we have just switched from 'maint' to 'master', and have the built
# 'automake' script left from 'maint', but the files 'lib/am/*.am'
# are from 'master': if 'automake' gets run and uses those files --
ifdef config-status # Bootstrap from an already-configured tree.
# We need the definition of $(srcdir) in the 'bootstrap' rule
srcdir := $(shell echo @srcdir@ | $(config-status) --file=-)
$(error Could not obtain $$(srcdir) from $(config-status))
# Also, if we are re-bootstrapping an already-configured tree, we
# want to re-configure it with the same pre-existing configuration.
old-configure-flags := $(shell $(config-status) --config)
else # Assume we are bootstrapping from an unconfigured srcdir.
srcdir := .
configure-flags := $(old-configure-flags) $(BOOTSTRAP_CONFIGURE_FLAGS)
cd $(srcdir) && $(SHELL) ./bootstrap
$(MAKE) check TESTS=t/get-sysconf
# Ensure that all the specified targets but 'bootstrap' (if any) are
# run with a properly re-bootstrapped tree.
.PHONY: $(other-targets) restart
restart: bootstrap; $(MAKE) $(AM_MAKEFLAGS) $(other-targets)
endif # ! bootstrap in $(MAKECMDGOALS)