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
33srcdir = .
34top_srcdir = .
35
36# Make tar archive easier to reproduce.
37export TAR_OPTIONS = --owner=0 --group=0 --numeric-owner
38
39# Allow the user to add to this in the Makefile.
40ALL_RECURSIVE_TARGETS =
41
42# Some projects override e.g., _autoreconf here.
43-include $(srcdir)/cfg.mk
44
45# Allow cfg.mk to override these.
46_build-aux ?= build-aux
47_autoreconf ?= autoreconf -v
48
49include $(srcdir)/maint.mk
50
51# Ensure that $(VERSION) is up to date for dist-related targets, but not
52# for others: rerunning autoreconf and recompiling everything isn't cheap.
53_have-git-version-gen := \
54  $(shell test -f $(srcdir)/$(_build-aux)/git-version-gen && echo yes)
55ifeq ($(_have-git-version-gen)0,yes$(MAKELEVEL))
56  _is-dist-target ?= $(filter-out %clean, \
57    $(filter maintainer-% dist% alpha beta stable,$(MAKECMDGOALS)))
58  _is-install-target ?= $(filter-out %check, $(filter install%,$(MAKECMDGOALS)))
59  ifneq (,$(_is-dist-target)$(_is-install-target))
60    _curr-ver := $(shell cd $(srcdir)				\
61                   && $(_build-aux)/git-version-gen		\
62                         .tarball-version			\
63                         $(git-version-gen-tag-sed-script))
64    ifneq ($(_curr-ver),$(VERSION))
65      ifeq ($(_curr-ver),UNKNOWN)
66        $(info WARNING: unable to verify if $(VERSION) is the correct version)
67      else
68        ifneq (,$(_is-install-target))
69          # GNU Coding Standards state that 'make install' should not cause
70          # recompilation after 'make all'.  But as long as changing the version
71          # string alters config.h, the cost of having 'make all' always have an
72          # up-to-date version is prohibitive.  So, as a compromise, we merely
73          # warn when installing a version string that is out of date; the user
74          # should run 'autoreconf' (or something like 'make distcheck') to
75          # fix the version, 'make all' to propagate it, then 'make install'.
76          $(info WARNING: version string $(VERSION) is out of date;)
77          $(info run '$(MAKE) _version' to fix it)
78        else
79          $(info INFO: running autoreconf for new version string: $(_curr-ver))
80GNUmakefile: _version
81	touch GNUmakefile
82        endif
83      endif
84    endif
85  endif
86endif
87
88.PHONY: _version
89_version:
90	cd $(srcdir) && rm -rf autom4te.cache .version && $(_autoreconf)
91	$(MAKE) $(AM_MAKEFLAGS) Makefile
92
93
94# Tell version 3.79 and up of GNU make to not build goals in this
95# directory in parallel, in case someone tries to build multiple
96# targets, and one of them can cause a recursive target to be invoked.
97
98# Only set this if Automake doesn't provide it.
99AM_RECURSIVE_TARGETS ?= $(RECURSIVE_TARGETS:-recursive=) \
100  $(RECURSIVE_CLEAN_TARGETS:-recursive=) \
101  dist distcheck tags ctags
102
103ALL_RECURSIVE_TARGETS += $(AM_RECURSIVE_TARGETS)
104
105ifneq ($(word 2, $(MAKECMDGOALS)), )
106ifneq ($(filter $(ALL_RECURSIVE_TARGETS), $(MAKECMDGOALS)), )
107.NOTPARALLEL:
108endif
109endif
110