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# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: gnuconfig.eclass
# @MAINTAINER:
# maintainer-needed@gentoo.org
# @AUTHOR:
# Will Woods <wwoods@gentoo.org>
# @BLURB: Automatically update automake files to newest version
# @DESCRIPTION:
# This eclass is used to automatically update files that typically come with
# automake to the newest version available on the system. The most common use
# of this is to update config.guess and config.sub when configure dies from
# misguessing your canonical system name (CHOST). It can also be used to update
# other files that come with automake, e.g. depcomp, mkinstalldirs, etc.
#
# usage: gnuconfig_update [file1 file2 ...]
# if called without arguments, config.guess and config.sub will be updated.
# All files in the source tree ($S) with the given name(s) will be replaced
# with the newest available versions chosen from the list of locations in
# gnuconfig_findnewest(), below.
#
# gnuconfig_update should generally be called from src_unpack()
DEPEND="sys-devel/gnuconfig"
# @FUNCTION: gnuconfig_update
# @DESCRIPTION:
# Wrapper function for gnuconfig_do_update. If no arguments are given, update
# config.sub and config.guess (old default behavior), otherwise update the
# named files.
gnuconfig_update() {
local startdir # declared here ... used in gnuconfig_do_update
if [[ $1 == /* ]] ; then
startdir=$1
shift
else
startdir=${S}
fi
if [[ $# -gt 0 ]] ; then
gnuconfig_do_update "$@"
else
gnuconfig_do_update config.sub config.guess
fi
return $?
}
# @FUNCTION: gnuconfig_do_update
# @DESCRIPTION:
# Copy the newest available version of specified files over any old ones in the
# source dir. This function shouldn't be called directly - use gnuconfig_update
#
# Note: that since bash using dynamic scoping, startdir is available here from
# the gnuconfig_update function
gnuconfig_do_update() {
local configsubs_dir target targetlist file
[[ $# -eq 0 ]] && die "do not call gnuconfig_do_update; use gnuconfig_update"
configsubs_dir=$(gnuconfig_findnewest)
einfo "Using GNU config files from ${configsubs_dir}"
for file in "$@" ; do
if [[ ! -r ${configsubs_dir}/${file} ]] ; then
eerror "Can't read ${configsubs_dir}/${file}, skipping.."
continue
fi
targetlist=$(find "${startdir}" -name "${file}")
if [[ -n ${targetlist} ]] ; then
for target in ${targetlist} ; do
[[ -L ${target} ]] && rm -f "${target}"
einfo " Updating ${target/$startdir\//}"
cp -f "${configsubs_dir}/${file}" "${target}"
eend $?
done
else
ewarn " No ${file} found in ${startdir}, skipping ..."
fi
done
return 0
}
# @FUNCTION: gnuconfig_findnewest
# @DESCRIPTION:
# this searches the standard locations for the newest config.{sub|guess}, and
# returns the directory where they can be found.
gnuconfig_findnewest() {
local locations=(
"${EPREFIX}"/usr/share/misc/config.sub
"${EPREFIX}"/usr/share/gnuconfig/config.sub
"${EPREFIX}"/usr/share/automake*/config.sub
"${EPREFIX}"/usr/share/libtool/config.sub
)
grep -s '^timestamp' "${locations[@]}" | \
sort -r -n -t\' -k2 | \
sed -n '1{s,/config.sub:.*$,,;p;q}'
}
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