Merge changes made in Gnus trunk.
[emacs.git] / GNUmakefile
blob5fd329c78ef7a37acdc07aab26809f8e0cc09c3f
1 # Build Emacs from a fresh tarball or version-control checkout.
3 # Copyright 2011 Free Software Foundation, Inc.
5 # This file is part of GNU Emacs.
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.
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.
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/>.
20 # written by Paul Eggert
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.
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.
36 # If a Makefile already exists, just use it.
38 ifeq ($(wildcard Makefile),Makefile)
39 include Makefile
40 else
42 # If cleaning and Makefile does not exist, don't bother creating it.
43 # The source tree is already clean, or is in a weird state that
44 # requires expert attention.
46 ifeq ($(filter-out %clean,$(or $(MAKECMDGOALS),default)),)
48 $(MAKECMDGOALS):
49 @echo >&2 'No Makefile; skipping $@.'
51 else
53 # No Makefile, and not cleaning.
54 # If 'configure' does not exist, Emacs must have been checked
55 # out directly from the repository; run ./autogen.sh.
56 # Once 'configure' exists, run it.
57 # Finally, run the actual 'make'.
59 default $(filter-out configure Makefile,$(MAKECMDGOALS)): Makefile
60 $(MAKE) -f Makefile $(MAKECMDGOALS)
61 # Execute in sequence, so that multiple user goals don't conflict.
62 .NOTPARALLEL:
64 configure:
65 @echo >&2 'There seems to be no "configure" file in this directory.'
66 @echo >&2 'Running ./autogen.sh || autogen/copy_autogen ...'
67 ./autogen.sh || autogen/copy_autogen
68 @echo >&2 '"configure" file built.'
70 Makefile: configure
71 @echo >&2 'There seems to be no Makefile in this directory.'
72 @echo >&2 'Running ./configure ...'
73 ./configure
74 @echo >&2 'Makefile built.'
76 endif
77 endif