GNUmakefile

   1 # Build Emacs from a fresh tarball or version-control checkout.
   2
   3 # Copyright (C) 2011-2016 Free Software Foundation, Inc.
   4 #
   5 # This file is part of GNU Emacs.
   6 #
   7 # GNU Emacs is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # GNU Emacs is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20 # written by Paul Eggert
  21
  22
  23 # This GNUmakefile is for GNU Make.  It is for convenience, so that
  24 # one can run 'make' in an unconfigured source tree.  In such a tree,
  25 # this file causes GNU Make to first create a standard configuration
  26 # with the default options, and then reinvokes itself on the
  27 # newly-built Makefile.  If the source tree is already configured,
  28 # this file defers to the existing Makefile.
  29
  30 # If you are using a non-GNU 'make', or if you want non-default build
  31 # options, or if you want to build in an out-of-source tree, please
  32 # run "configure" by hand.  But run autogen.sh first, if the source
  33 # was checked out directly from the repository.
  34
  35 # If a Makefile already exists, just use it.
  36
  37 ifeq ($(wildcard Makefile),Makefile)
  38 include Makefile
  39 else
  40
  41 # If cleaning and Makefile does not exist, don't bother creating it.
  42 # The source tree is already clean, or is in a weird state that
  43 # requires expert attention.
  44
  45 ifeq ($(filter-out %clean,$(or $(MAKECMDGOALS),default)),)
  46
  47 $(MAKECMDGOALS):
  48         @echo >&2 'No Makefile; skipping $@.'
  49
  50 else
  51
  52 # No Makefile, and not cleaning.
  53 # If 'configure' does not exist, Emacs must have been checked
  54 # out directly from the repository; run ./autogen.sh.
  55 # Once 'configure' exists, run it.
  56 # Finally, run the actual 'make'.
  57
  58 ORDINARY_GOALS = $(filter-out configure Makefile bootstrap,$(MAKECMDGOALS))
  59
  60 default $(ORDINARY_GOALS): Makefile
  61         $(MAKE) -f Makefile $(MAKECMDGOALS)
  62 # Execute in sequence, so that multiple user goals don't conflict.
  63 .NOTPARALLEL:
  64
  65 # 'all' if a .git subdirectory is present, empty otherwise.
  66 ALL_IF_GIT = $(subst .git,all,$(wildcard .git))
  67
  68 configure:
  69         @echo >&2 'There seems to be no "configure" file in this directory.'
  70         @echo >&2 Running ./autogen.sh $(ALL_IF_GIT) ...
  71         ./autogen.sh $(ALL_IF_GIT)
  72         @echo >&2 '"configure" file built.'
  73
  74 Makefile: configure
  75         @echo >&2 'There seems to be no Makefile in this directory.'
  76         @echo >&2 'Running ./configure ...'
  77         ./configure
  78         @echo >&2 'Makefile built.'
  79
  80 # 'make bootstrap' in a fresh checkout needn't run 'configure' twice.
  81 bootstrap: Makefile
  82         $(MAKE) -f Makefile all
  83
  84 .PHONY: bootstrap default $(ORDINARY_GOALS)
  85
  86 endif
  87 endif