Increase prerequisite version numbers to match what the code really needs.

diff --git a/ChangeLog b/ChangeLog
index b772faf..f29be8b 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,18 @@
 2004-05-27  Paul Eggert  <eggert@cs.ucla.edu>
 
+       Spent a few hours checking out which prerequisite versions the
+       current sources actually require.  I went all the way back to
+       Gettext 0.10.40, Automake 1.4, and Autoconf 2.57 and investigated
+       a seemingly endless set of combinations of versions more recent
+       than that.  The bottom line is that the current sources require
+       fairly recent versions of the build tools, and it'll be some work
+       to change this.
+       * configure.ac (AC_PREREQ): Increase from 2.58 to 2.59.
+       (AM_INIT_AUTOMAKE): Increase from 1.7 to 1.8.
+       (AM_GNU_GETTEXT_VERSION): Increase from 0.11.5 to 0.12.
+       Add comments explaining why those particular versions are
+       currently needed.
+       
        * src/parse-gram.y (lloc_default): Rewrite to avoid compiler bug
        in SGI MIPSpro 7.4.1m.  Problem reported by Albert Chin-A-Young in
        <http://mail.gnu.org/archive/html/bug-bison/2004-05/msg00037.html>.

diff --git a/configure.ac b/configure.ac
index 34d1c6b..9cfc66b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -17,15 +17,18 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 # 02111-1307  USA
 
-# We need a recent Autoconf to avoid the message
-# "autom4te: unknown language: Autoconf-without-aclocal-m4".
-AC_PREREQ(2.58)
+# This file uses AC_CONFIG_MACRO_DIR, so we need Autoconf 2.58 or better.
+# But Autoconf 2.58 has a bug in the way that it generates tests: it
+# puts the wrong absolute path names in the tests.  So we need at
+# least Autoconf 2.59.
+AC_PREREQ(2.59)
 
 AC_INIT([GNU Bison], [1.875e], [bug-bison@gnu.org])
 AC_CONFIG_AUX_DIR([config])
 AC_CONFIG_MACRO_DIR([m4])
 
-AM_INIT_AUTOMAKE([1.7 check-news readme-alpha dist-bzip2])
+# We don't have a file m4/Makefile.am, so we need Automake 1.8 or later.
+AM_INIT_AUTOMAKE([1.8 check-news readme-alpha dist-bzip2])
 AC_CONFIG_HEADERS([config.h:config.hin])
 
 gl_USE_SYSTEM_EXTENSIONS
@@ -104,7 +107,8 @@ BISON_PREREQ_TIMEVAR
 
 # gnulib and gettext.
 GNULIB_AUTOCONF_SNIPPET
-AM_GNU_GETTEXT_VERSION([0.11.5])
+# We use po/Makevars.template, so we need at least gettext 0.12.
+AM_GNU_GETTEXT_VERSION([0.12])
 
 # Initialize the test suite.
 AC_CONFIG_TESTDIR(tests)