Hi all, So, Debian is in the process of bringing up our upcoming arm64 port. Unfortunately we are also coming across lots of packages with rather outdated config.guess and config.sub files (see links below). We could patch every single package that contains config.guess and config.sub but that would be a lot of effort that doesn't scale. We could also patch our build tools but the problem would still exist for other distros. I would like to get rid of this issue once and for all by making the update process for config.guess and config.sub once per machine or once per package instead of once per package. My initial approach in 2009 was to patch config.guess and config.sub to look for newer versions of themselves but the maintainer of these files wasn't happy with that approach. I recently re-contacted him about this issue and was suggested to patch autoconf. The approach I have taken is to make autoconf-produced configure scripts use the package-local config.guess/config.sub by default and if that fails then find the newest config.guess/config.sub in a number of paths on the system and use it. I am not very familiar with autoconf internals, m4 or the intricacies of ancient shells, so I would very much appreciate a review of both the approach and my initial attempt at implementing this, please see the attached patch. If anyone knows where config.guess and config.sub are installed on common platforms like the various Linux or BSD distributions, please let me know those locations. I have only the paths for Debian and Gentoo. http://wookware.org/files/aarch64faillog http://bugs.debian.org/689607 http://bugs.debian.org/689610 http://bugs.debian.org/689611 http://bugs.debian.org/689612 http://bugs.debian.org/689613 http://bugs.debian.org/689614 http://bugs.debian.org/689615 http://bugs.debian.org/689617 http://bugs.debian.org/689618 http://bugs.debian.org/689619 http://bugs.debian.org/689620 http://bugs.debian.org/689621 -- bye, pabs http://bonedaddy.net/pabs3/
From a8e1e438d4e529ba0a9d1f28b73eacb2d881071d Mon Sep 17 00:00:00 2001
From: Paul Wise <pabs3@xxxxxxxxxxxxx>
Date: Mon, 8 Oct 2012 19:34:50 +0800
Subject: [PATCH] Check a number of paths for newer config.guess/config.sub
and run the latest.
This helps people who are bootstrapping new systems from existing software
that uses GNU autotools, config.guess and config.sub.
This is very useful for distributions like Debian that add new architectures
and then have to update config.sub and config.guess in every single package
that uses automake or have to workaround the problem by adding code to each
package to copy in the latest versions of these scripts from another package
containing the latest version of the scripts (autotools-dev in Debian).
---
lib/autoconf/general.m4 | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index 51cee30..d6366c9 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -1719,6 +1719,35 @@ ac_configure="$SHELL $ac_aux_dir/configure" # Please don't use this var.
AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
])# AC_CONFIG_AUX_DIRS
+# Search for the newest config.sub/config.guess
+AC_DEFUN([AC_CONFIG_AUX_EXT_DIRS],
+[
+cur_v=`$SHELL "$ac_aux_dir/$1" --time-stamp | sed s/-//g`
+for path in \
+ "$HOME/.config/autotools" \
+ /usr/local/share/automake-* \
+ /usr/local/share/automake \
+ /usr/share/misc \
+ /usr/share/gnuconfig \
+ /usr/share/automake-* \
+ /usr/share/automake \
+ ; do
+ if test -x "$path/$1" ; then
+ v=`$SHELL "$path/$1" --time-stamp | sed s/-//g`
+ if test "$v" -gt "$cur_v" ; then
+ cur_v="$v"
+ latest="$path"
+ fi
+ fi
+done
+if test "x$latest" != x ; then
+ if test "x$2" != x ; then
+ $SHELL "$latest/$1" "$2"
+ else
+ $SHELL "$latest/$1"
+ if
+fi
+])
@@ -1804,8 +1833,11 @@ AC_CACHE_CHECK([build system type], [ac_cv_build],
test "x$ac_build_alias" = x &&
ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`
test "x$ac_build_alias" = x &&
+ ac_build_alias=`AC_CONFIG_AUX_EXT_DIRS([config.guess])"`
+test "x$ac_build_alias" = x &&
AC_MSG_ERROR([cannot guess build type; you must specify one])
ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||
+ ac_cv_build=`AC_CONFIG_AUX_EXT_DIRS([config.sub],[$ac_build_alias])` ||
AC_MSG_ERROR([$SHELL $ac_aux_dir/config.sub $ac_build_alias failed])
])
_AC_CANONICAL_SPLIT(build)
@@ -1823,6 +1855,7 @@ AC_CACHE_CHECK([host system type], [ac_cv_host],
ac_cv_host=$ac_cv_build
else
ac_cv_host=`$SHELL "$ac_aux_dir/config.sub" $host_alias` ||
+ ac_cv_host=`AC_CONFIG_AUX_EXT_DIRS([config.sub],[$ac_host_alias])` ||
AC_MSG_ERROR([$SHELL $ac_aux_dir/config.sub $host_alias failed])
fi
])
@@ -1842,6 +1875,7 @@ AC_CACHE_CHECK([target system type], [ac_cv_target],
ac_cv_target=$ac_cv_host
else
ac_cv_target=`$SHELL "$ac_aux_dir/config.sub" $target_alias` ||
+ ac_cv_target=`AC_CONFIG_AUX_EXT_DIRS([config.sub],[$ac_target_alias])` ||
AC_MSG_ERROR([$SHELL $ac_aux_dir/config.sub $target_alias failed])
fi
])
--
1.7.10.4
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