--- /dev/null
+#! /bin/sh
+# Script to generate SYSROOT_SUFFIX_SPEC equivalent to MULTILIB_OSDIRNAMES
+# Arguments are MULTILIB_OSDIRNAMES, MULTILIB_OPTIONS and MULTILIB_MATCHES.
+
+# Copyright (C) 2009 Free Software Foundation, Inc.
+
+# This file is part of GCC.
+
+# GCC 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, or (at your option) any later
+# version.
+
+# GCC 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 GCC; see the file COPYING3. If not see
+# <http://www.gnu.org/licenses/>.
+
+# This shell script produces a header file fragment that defines
+# SYSROOT_SUFFIX_SPEC. It assumes that the sysroots will have the same
+# structure and names used by the multilibs.
+
+# Invocation:
+# print-sysroot-suffix.sh \
+# MULTILIB_OSDIRNAMES \
+# MULTILIB_OPTIONS \
+# MULTILIB_MATCHES \
+# > t-sysroot-suffix.h
+
+# The three options exactly correspond to the variables of the same
+# names defined in the tmake_file fragments.
+
+# Example:
+# sh ./gcc/config/print-sysroot-suffix.sh "a=A" "a b/c/d" ""
+# =>
+# #undef SYSROOT_SUFFIX_SPEC
+# #define SYSROOT_SUFFIX_SPEC "" \
+# "%{a:" \
+# "%{b:A/b/;" \
+# "c:A/c/;" \
+# "d:A/d/;" \
+# ":A/};" \
+# ":}"
+
+# The script uses temporary subscripts in order to permit a recursive
+# algorithm without the use of functions.
+
+set -e
+
+dirnames="$1"
+options="$2"
+matches="$3"
+
+cat > print-sysroot-suffix3.sh <<\EOF
+#! /bin/sh
+# Print all the multilib matches for this option
+result="$1"
+EOF
+for x in $matches; do
+ l=`echo $x | sed -e 's/=.*$//' -e 's/?/=/g'`
+ r=`echo $x | sed -e 's/^.*=//' -e 's/?/=/g'`
+ echo "[ \"\$1\" = \"$l\" ] && result=\"\$result|$r\"" >> print-sysroot-suffix3.sh
+done
+echo 'echo $result' >> print-sysroot-suffix3.sh
+chmod +x print-sysroot-suffix3.sh
+
+cat > print-sysroot-suffix2.sh <<\EOF
+#! /bin/sh
+# Recursive script to enumerate all multilib combinations, match against
+# multilib directories and output a spec string of the result.
+# Will fold identical trees.
+
+padding="$1"
+optstring="$2"
+shift 2
+n="\" \\
+$padding\""
+if [ $# = 0 ]; then
+EOF
+
+pat=
+for x in $dirnames; do
+ p=`echo $x | sed -e 's,=!,/$=/,'`
+ pat="$pat -e 's=^//$p='"
+done
+echo ' optstring=`echo "/$optstring" | sed '"$pat\`" >> print-sysroot-suffix2.sh
+cat >> print-sysroot-suffix2.sh <<\EOF
+ case $optstring in
+ //*)
+ ;;
+ *)
+ echo "$optstring"
+ ;;
+ esac
+else
+ thisopt="$1"
+ shift
+ bit=
+ lastcond=
+ result=
+ for x in `echo "$thisopt" | sed -e 's,/, ,g'`; do
+ case $x in
+EOF
+for x in `echo "$options" | sed -e 's,/, ,g'`; do
+ match=`./print-sysroot-suffix3.sh "$x"`
+ echo "$x) optmatch=\"$match\" ;;" >> print-sysroot-suffix2.sh
+done
+cat >> print-sysroot-suffix2.sh <<\EOF
+ esac
+ bit=`"$0" "$padding " "$optstring$x/" "$@"`
+ if [ -z "$lastopt" ]; then
+ lastopt="$optmatch"
+ else
+ if [ "$lastbit" = "$bit" ]; then
+ lastopt="$lastopt|$optmatch"
+ else
+ result="$result$lastopt:$lastbit;$n"
+ lastopt="$optmatch"
+ fi
+ fi
+ lastbit="$bit"
+ done
+ bit=`"$0" "$padding " "$optstring" "$@"`
+ if [ "$bit" = "$lastbit" ]; then
+ if [ -z "$result" ]; then
+ echo "$bit"
+ else
+ echo "$n%{$result:$bit}"
+ fi
+ else
+ echo "$n%{$result$lastopt:$lastbit;$n:$bit}"
+ fi
+fi
+EOF
+
+chmod +x ./print-sysroot-suffix2.sh
+result=`./print-sysroot-suffix2.sh "" "/" $options`
+echo "#undef SYSROOT_SUFFIX_SPEC"
+echo "#define SYSROOT_SUFFIX_SPEC \"$result\""
+rm print-sysroot-suffix2.sh
+rm print-sysroot-suffix3.sh
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