2007-11-08 Paolo Bonzini <bonzini@gnu.org>

[bison.git] / GNUmakefile

diff --git a/GNUmakefile b/GNUmakefile
index 0c5a0715d5a39273940c6252be7bab46f1005942..c5678b43d02adea5b5e9b4546ad8b4ae5a2f7743 100644 (file)
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -4,9 +4,30 @@
 # It is necessary if you want to build targets usually of interest
 # only to the maintainer.
 
+# Copyright (C) 2001, 2003, 2006-2007 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 # Systems where /bin/sh is not the default shell need this.  The $(shell)
 # command below won't work with e.g. stock DOS/Windows shells.
+ifeq ($(wildcard /bin/s[h]),/bin/sh)
 SHELL = /bin/sh
+else
+# will be used only with the next shell-test line, then overwritten
+# by a configured-in value
+SHELL = sh
+endif
 
 have-Makefile := $(shell test -f Makefile && echo yes)
 
@@ -14,14 +35,32 @@ have-Makefile := $(shell test -f Makefile && echo yes)
 # give them a diagnostic.
 ifeq ($(have-Makefile),yes)
 
+# Make tar archive easier to reproduce.
+export TAR_OPTIONS = --owner=0 --group=0 --numeric-owner
+
 include Makefile
+
+# Ensure that $(VERSION) is up to date for dist-related targets, but not
+# for others: rerunning autoconf and recompiling everything isn't cheap.
+ifeq (0,$(MAKELEVEL))
+  _is-dist-target = $(filter dist% alpha beta major,$(MAKECMDGOALS))
+  ifneq (,$(_is-dist-target))
+    _curr-ver := $(shell build-aux/git-version-gen 0 .version)
+    ifneq ($(_curr-ver),$(VERSION))
+      $(info INFO: rerunning autoconf for new version string: $(_curr-ver))
+      dummy := $(shell rm -rf autom4te.cache; $(AUTOCONF))
+    endif
+  endif
+endif
+
+include $(srcdir)/Makefile.cfg
 include $(srcdir)/Makefile.maint
 
 else
 
 all:
-       @echo There seems to be no Makefile in this directory.
-       @echo "You must run ./configure before running \`make'."
+       @echo There seems to be no Makefile in this directory.   1>&2
+       @echo "You must run ./configure before running \`make'." 1>&2
        @exit 1
 
 endif