GNUmakefile

   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, 2006-2008 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 $(shell)
  24 # command below won't work with e.g. stock DOS/Windows shells.
  25 ifeq ($(wildcard /bin/s[h]),/bin/sh)
  26 SHELL = /bin/sh
  27 else
  28 # will be used only with the next shell-test line, then overwritten
  29 # by a configured-in value
  30 SHELL = sh
  31 endif
  32
  33 # If the user runs GNU make but has not yet run ./configure,
  34 # give them a diagnostic.
  35 _have-Makefile := $(shell test -f Makefile && echo yes)
  36 ifeq ($(_have-Makefile),yes)
  37
  38 # Make tar archive easier to reproduce.
  39 export TAR_OPTIONS = --owner=0 --group=0 --numeric-owner
  40
  41 include Makefile
  42
  43 # Some projects override e.g., _autoreconf here.
  44 -include $(srcdir)/cfg.mk
  45 include $(srcdir)/maint.mk
  46
  47 # Allow cfg.mk to override these.
  48 _build-aux ?= build-aux
  49 _autoreconf ?= autoreconf
  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)
  55 ifeq ($(_have-git-version-gen)0,yes$(MAKELEVEL))
  56   _is-dist-target = $(filter-out %clean, \
  57     $(filter maintainer-% dist% alpha beta major,$(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                    && $(_build-aux)/git-version-gen .tarball-version)
  62     ifneq ($(_curr-ver),$(VERSION))
  63       ifeq ($(_curr-ver),UNKNOWN)
  64         $(info WARNING: unable to verify if $(VERSION) is correct version)
  65       else
  66         ifneq (,$(_is-install-target))
  67           # GNU Coding Standards state that 'make install' should not cause
  68           # recompilation after 'make all'.  But as long as changing the version
  69           # string alters config.h, the cost of having 'make all' always have an
  70           # up-to-date version is prohibitive.  So, as a compromise, we merely
  71           # warn when installing a version string that is out of date; the user
  72           # should run 'autoreconf' (or something like 'make distcheck') to
  73           # fix the version, 'make all' to propagate it, then 'make install'.
  74           $(info WARNING: version string $(VERSION) is out of date; run autoreconf -f to fix it)
  75         else
  76           $(info INFO: running autoreconf for new version string: $(_curr-ver))
  77           _dummy := $(shell cd $(srcdir) && rm -rf autom4te.cache .version \
  78             && $(_autoreconf))
  79         endif
  80       endif
  81     endif
  82   endif
  83 endif
  84
  85 else
  86
  87 .DEFAULT_GOAL := abort-due-to-no-makefile
  88 srcdir = .
  89
  90 # The package can override .DEFAULT_GOAL to run actions like autoreconf.
  91 -include ./cfg.mk
  92 include ./maint.mk
  93
  94 ifeq ($(.DEFAULT_GOAL),abort-due-to-no-makefile)
  95 $(MAKECMDGOALS): abort-due-to-no-makefile
  96 endif
  97
  98 abort-due-to-no-makefile:
  99         @echo There seems to be no Makefile in this directory.   1>&2
 100         @echo "You must run ./configure before running \`make'." 1>&2
 101         @exit 1
 102
 103 endif
 104
 105 # Tell version 3.79 and up of GNU make to not build goals in this
 106 # directory in parallel.  This is necessary in case someone tries to
 107 # build multiple targets on one command line.
 108 .NOTPARALLEL: