[PATCH] version: fix copyright year

[Paolo Bonzini]

* configure.ac: Add COPYRIGHT_YEAR #define.
* README-release: Document it.
* src/main.c (main): Use it.
---
 README-release |    3 +++
 configure.ac   |    1 +
 src/main.c     |    4 ++--
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/README-release b/README-release
index 0df5ff5..5be29b2 100644
--- a/README-release
+++ b/README-release
@@ -4,6 +4,9 @@ Here are most of the steps we (maintainers) follow when making 
a release.
 
     git checkout master; git pull
 
+* Ensure that COPYRIGHT_YEAR is correct in configure.ac.  If not, update
+  it and commit the change.
+
 * Run ./configure && make maintainer-clean
 
 * Ensure that the desired versions of autoconf, automake, etc.
diff --git a/configure.ac b/configure.ac
index 01ae0f2..744fa00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,7 @@ AC_INIT([GNU grep],
 AC_CONFIG_AUX_DIR(build-aux)
 AC_CONFIG_SRCDIR(src/grep.c)
 AC_DEFINE([GREP], 1, [We are building grep])
+AC_DEFINE([COPYRIGHT_YEAR], 2010, [Copyright year for --version.])
 AC_PREREQ(2.59)
 
 dnl Automake stuff.
diff --git a/src/main.c b/src/main.c
index 5314912..e4ea374 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2158,11 +2158,11 @@ main (int argc, char **argv)
     {
       printf ("%s\n\n", PACKAGE_STRING);
       printf (_("\
-Copyright (C) %s Free Software Foundation, Inc.\n\
+Copyright (C) %d Free Software Foundation, Inc.\n\
 License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>\n\
 This is free software: you are free to change and redistribute it.\n\
 There is NO WARRANTY, to the extent permitted by law.\n"),
-        "2009");
+        COPYRIGHT_YEAR);
       printf ("\n");
       exit (EXIT_SUCCESS);
     }
-- 
1.7.1