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, 2006-2009 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
48include $(srcdir)/maint.mk
49
50# Allow cfg.mk to override these.
51_build-aux ?= build-aux
52_autoreconf ?= autoreconf
53
54# Ensure that $(VERSION) is up to date for dist-related targets, but not
55# for others: rerunning autoreconf and recompiling everything isn't cheap.
56_have-git-version-gen := \
57  $(shell test -f $(srcdir)/$(_build-aux)/git-version-gen && echo yes)
58ifeq ($(_have-git-version-gen)0,yes$(MAKELEVEL))
59  _is-dist-target ?= $(filter-out %clean, \
60    $(filter maintainer-% dist% alpha beta major,$(MAKECMDGOALS)))
61  _is-install-target ?= $(filter-out %check, $(filter install%,$(MAKECMDGOALS)))
62  ifneq (,$(_is-dist-target)$(_is-install-target))
63    _curr-ver := $(shell cd $(srcdir) \
64                   && $(_build-aux)/git-version-gen .tarball-version)
65    ifneq ($(_curr-ver),$(VERSION))
66      ifeq ($(_curr-ver),UNKNOWN)
67        $(info WARNING: unable to verify if $(VERSION) is the correct version)
68      else
69        ifneq (,$(_is-install-target))
70          # GNU Coding Standards state that 'make install' should not cause
71          # recompilation after 'make all'.  But as long as changing the version
72          # string alters config.h, the cost of having 'make all' always have an
73          # up-to-date version is prohibitive.  So, as a compromise, we merely
74          # warn when installing a version string that is out of date; the user
75          # should run 'autoreconf' (or something like 'make distcheck') to
76          # fix the version, 'make all' to propagate it, then 'make install'.
77          $(info WARNING: version string $(VERSION) is out of date;)
78          $(info run '$(MAKE) _version' to fix it)
79        else
80          $(info INFO: running autoreconf for new version string: $(_curr-ver))
81          _dummy := $(shell $(MAKE) $(AM_MAKEFLAGS) _version)
82        endif
83      endif
84    endif
85  endif
86endif
87
88.PHONY: _version
89_version:
90	cd $(srcdir) && rm -rf autom4te.cache .version && $(_autoreconf)
91
92else
93
94.DEFAULT_GOAL := abort-due-to-no-makefile
95srcdir = .
96
97# The package can override .DEFAULT_GOAL to run actions like autoreconf.
98-include ./cfg.mk
99include ./maint.mk
100
101ifeq ($(.DEFAULT_GOAL),abort-due-to-no-makefile)
102$(MAKECMDGOALS): abort-due-to-no-makefile
103endif
104
105abort-due-to-no-makefile:
106	@echo There seems to be no Makefile in this directory.   1>&2
107	@echo "You must run ./configure before running \`make'." 1>&2
108	@exit 1
109
110endif
111
112# Tell version 3.79 and up of GNU make to not build goals in this
113# directory in parallel, in case someone tries to build multiple
114# targets, and one of them can cause a recursive target to be invoked.
115
116# Only set this if Automake doesn't provide it.
117AM_RECURSIVE_TARGETS ?= $(RECURSIVE_TARGETS:-recursive=) \
118  $(RECURSIVE_CLEAN_TARGETS:-recursive=) \
119  dist distcheck tags ctags
120
121ALL_RECURSIVE_TARGETS += $(AM_RECURSIVE_TARGETS)
122
123ifneq ($(word 2, $(MAKECMDGOALS)), )
124ifneq ($(filter $(ALL_RECURSIVE_TARGETS), $(MAKECMDGOALS)), )
125.NOTPARALLEL:
126endif
127endif
128