1# Having a separate GNUmakefile lets me `include' the dynamically 2# generated rules created via cfg.mk (package-local configuration) 3# as well as maint.mk (generic maintainer rules). 4# This makefile is used only if you run GNU Make. 5# It is necessary if you want to build targets usually of interest 6# only to the maintainer. 7 8# Copyright (C) 2001, 2003, 2006-2011 Free Software Foundation, Inc. 9 10# This program is free software: you can redistribute it and/or modify 11# it under the terms of the GNU General Public License as published by 12# the Free Software Foundation, either version 3 of the License, or 13# (at your option) any later version. 14 15# This program is distributed in the hope that it will be useful, 16# but WITHOUT ANY WARRANTY; without even the implied warranty of 17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18# GNU General Public License for more details. 19 20# You should have received a copy of the GNU General Public License 21# along with this program. If not, see <http://www.gnu.org/licenses/>. 22 23# Systems where /bin/sh is not the default shell need this. The $(shell) 24# command below won't work with e.g. stock DOS/Windows shells. 25ifeq ($(wildcard /bin/s[h]),/bin/sh) 26SHELL = /bin/sh 27else 28# will be used only with the next shell-test line, then overwritten 29# by a configured-in value 30SHELL = sh 31endif 32 33# If the user runs GNU make but has not yet run ./configure, 34# give them a diagnostic. 35_have-Makefile := $(shell test -f Makefile && echo yes) 36ifeq ($(_have-Makefile),yes) 37 38# Make tar archive easier to reproduce. 39export TAR_OPTIONS = --owner=0 --group=0 --numeric-owner 40 41# Allow the user to add to this in the Makefile. 42ALL_RECURSIVE_TARGETS = 43 44include Makefile 45 46# Some projects override e.g., _autoreconf here. 47-include $(srcdir)/cfg.mk 48 49# Allow cfg.mk to override these. 50_build-aux ?= build-aux 51_autoreconf ?= autoreconf -v 52 53include $(srcdir)/maint.mk 54 55# Ensure that $(VERSION) is up to date for dist-related targets, but not 56# for others: rerunning autoreconf and recompiling everything isn't cheap. 57_have-git-version-gen := \ 58 $(shell test -f $(srcdir)/$(_build-aux)/git-version-gen && echo yes) 59ifeq ($(_have-git-version-gen)0,yes$(MAKELEVEL)) 60 _is-dist-target ?= $(filter-out %clean, \ 61 $(filter maintainer-% dist% alpha beta stable,$(MAKECMDGOALS))) 62 _is-install-target ?= $(filter-out %check, $(filter install%,$(MAKECMDGOALS))) 63 ifneq (,$(_is-dist-target)$(_is-install-target)) 64 _curr-ver := $(shell cd $(srcdir) \ 65 && $(_build-aux)/git-version-gen \ 66 .tarball-version \ 67 $(git-version-gen-tag-sed-script)) 68 ifneq ($(_curr-ver),$(VERSION)) 69 ifeq ($(_curr-ver),UNKNOWN) 70 $(info WARNING: unable to verify if $(VERSION) is the correct version) 71 else 72 ifneq (,$(_is-install-target)) 73 # GNU Coding Standards state that 'make install' should not cause 74 # recompilation after 'make all'. But as long as changing the version 75 # string alters config.h, the cost of having 'make all' always have an 76 # up-to-date version is prohibitive. So, as a compromise, we merely 77 # warn when installing a version string that is out of date; the user 78 # should run 'autoreconf' (or something like 'make distcheck') to 79 # fix the version, 'make all' to propagate it, then 'make install'. 80 $(info WARNING: version string $(VERSION) is out of date;) 81 $(info run '$(MAKE) _version' to fix it) 82 else 83 $(info INFO: running autoreconf for new version string: $(_curr-ver)) 84GNUmakefile: _version 85 touch GNUmakefile 86 endif 87 endif 88 endif 89 endif 90endif 91 92.PHONY: _version 93_version: 94 cd $(srcdir) && rm -rf autom4te.cache .version && $(_autoreconf) 95 $(MAKE) $(AM_MAKEFLAGS) Makefile 96 97else 98 99.DEFAULT_GOAL := abort-due-to-no-makefile 100srcdir = . 101 102# The package can override .DEFAULT_GOAL to run actions like autoreconf. 103-include ./cfg.mk 104include ./maint.mk 105 106ifeq ($(.DEFAULT_GOAL),abort-due-to-no-makefile) 107$(MAKECMDGOALS): abort-due-to-no-makefile 108endif 109 110abort-due-to-no-makefile: 111 @echo There seems to be no Makefile in this directory. 1>&2 112 @echo "You must run ./configure before running \`make'." 1>&2 113 @exit 1 114 115endif 116 117# Tell version 3.79 and up of GNU make to not build goals in this 118# directory in parallel, in case someone tries to build multiple 119# targets, and one of them can cause a recursive target to be invoked. 120 121# Only set this if Automake doesn't provide it. 122AM_RECURSIVE_TARGETS ?= $(RECURSIVE_TARGETS:-recursive=) \ 123 $(RECURSIVE_CLEAN_TARGETS:-recursive=) \ 124 dist distcheck tags ctags 125 126ALL_RECURSIVE_TARGETS += $(AM_RECURSIVE_TARGETS) 127 128ifneq ($(word 2, $(MAKECMDGOALS)), ) 129ifneq ($(filter $(ALL_RECURSIVE_TARGETS), $(MAKECMDGOALS)), ) 130.NOTPARALLEL: 131endif 132endif 133