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#!/bin/sh
# Copyright (C) 2007-2018 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 script takes the following arguments:
#
# - the target sysroot
# - the value of $(MULTILIB_MATCHES)
# - the value of $(MULTILIB_OPTIONS)
#
# It uses these arguments to construct a definition of SYSROOT_SUFFIX_SPEC,
# which it prints to the standard output. For each multilib directory FOO,
# the script checks whether $sysroot has a subdirectory FOO, and if so will
# use /FOO for all compatible command-line options. It will not add a
# suffix for /FOO's options otherwise. These suffixes are concatenated,
# with one subspec for each space-separated entry in $(MULTILIB_OPTIONS).
set -e
sysroot=$1
matches=$2
options=$3
# For each multilib option OPT, add to $substs a sed command of the
# form "-e 's/OPT/OPT/'".
substs=""
for option in `echo "$options" | tr '/' ' '`
do
substs="$substs -e 's/$option/$option/g'"
done
# For each ALIAS=CANONICAL entry in $MULTILIB_MATCHES, look for sed
# arguments in $substs of the form "-e 's/CANONICAL/.../'". Replace
# such entries with "-e 's/CANONICAL/ALIAS|.../'". Both the ALIAS and
# CANONICAL parts of $MULTILIB_MATCHES use '?' to stand for '='.
#
# After this loop, a command of the form "echo FOO | eval sed $substs"
# will replace a canonical option FOO with a %{...}-style spec pattern.
for match in $matches
do
canonical=`echo "$match" | sed -e 's/=.*//' -e 's/?/=/g'`
alias=`echo "$match" | sed -e 's/.*=//' -e 's/?/=/g'`
substs=`echo "$substs" | sed -e "s,s/$canonical/,&$alias|,"`
done
# Build up the final SYSROOT_SUFFIX_SPEC in $spec.
spec=
for combo in $options
do
# See which option alternatives in $combo have their own sysroot
# directory. Create a subspec of the form "%{PAT1:/DIR1;...;PATn:DIRn}"
# from each such option OPTi, where DIRi is the directory associated
# with OPTi and PATi is the result of passing OPTi through $substs.
subspec=
for option in `echo "$combo" | tr '/' ' '`
do
dir=`echo "$option" | sed 's/mcpu=//'`
if test -d "$sysroot/$dir"; then
test -z "$subspec" || subspec="$subspec;"
subspec="$subspec"`echo "$option" | eval sed $substs`":/$dir"
fi
done
# Concatenate all the subspecs.
test -z "$subspec" || spec="$spec%{$subspec}"
done
if test -n "$spec"; then
echo "#undef SYSROOT_SUFFIX_SPEC"
echo "#define SYSROOT_SUFFIX_SPEC \"$spec\""
fi
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