1#!/bin/sh
2# Copyright (C) 2006-2018 Free Software Foundation, Inc.
3# This file is part of GCC.
4
5# GCC is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 3, or (at your option)
8# any later version.
9
10# GCC is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14
15# You should have received a copy of the GNU General Public License
16# along with GCC; see the file COPYING3.  If not see
17# <http://www.gnu.org/licenses/>.
18
19# This script takes the following arguments:
20#
21#    - the target sysroot
22#    - the value of $(MULTILIB_MATCHES)
23#    - the value of $(MULTILIB_OPTIONS)
24#
25# It uses these arguments to construct a definition of SYSROOT_SUFFIX_SPEC,
26# which it prints to the standard output.  For each multilib directory FOO,
27# the script checks whether $sysroot has a subdirectory FOO, and if so will
28# use /FOO for all compatible command-line options.  It will not add a
29# suffix for /FOO's options otherwise.  These suffixes are concatenated,
30# with one subspec for each space-separated entry in $(MULTILIB_OPTIONS).
31set -e
32sysroot=$1
33matches=$2
34options=$3
35
36# For each multilib option OPT, add to $substs a sed command of the
37# form "-e 's/OPT/OPT/'".
38substs=""
39for option in `echo "$options" | tr '/' ' '`
40do
41  substs="$substs -e 's/$option/$option/g'"
42done
43
44# For each ALIAS=CANONICAL entry in $MULTILIB_MATCHES, look for sed
45# arguments in $substs of the form "-e 's/CANONICAL/.../'".  Replace
46# such entries with "-e 's/CANONICAL/ALIAS|.../'".  Both the ALIAS and
47# CANONICAL parts of $MULTILIB_MATCHES use '?' to stand for '='.
48#
49# After this loop, a command of the form "echo FOO | eval sed $substs"
50# will replace a canonical option FOO with a %{...}-style spec pattern.
51for match in $matches
52do
53  canonical=`echo "$match" | sed -e 's/=.*//' -e 's/?/=/g'`
54  alias=`echo "$match" | sed -e 's/.*=//' -e 's/?/=/g'`
55  substs=`echo "$substs" | sed -e "s,s/$canonical/,&$alias|,"`
56done
57
58# Build up the final SYSROOT_SUFFIX_SPEC in $spec.
59spec=
60for combo in $options
61do
62  # See which option alternatives in $combo have their own sysroot
63  # directory.  Create a subspec of the form "%{PAT1:/DIR1;...;PATn:DIRn}"
64  # from each such option OPTi, where DIRi is the directory associated
65  # with OPTi and PATi is the result of passing OPTi through $substs.
66  subspec=
67  for option in `echo "$combo" | tr '/' ' '`
68  do
69    dir=`echo "$option" | sed 's/cpu=//'`
70    if test -d "$sysroot/$dir"; then
71      test -z "$subspec" || subspec="$subspec;"
72      subspec="$subspec"`echo "$option" | eval sed $substs`":/$dir"
73    fi
74  done
75  # Concatenate all the subspecs.
76  test -z "$subspec" || spec="$spec%{$subspec}"
77done
78if test -n "$spec"; then
79  echo "#undef SYSROOT_SUFFIX_SPEC"
80  echo "#define SYSROOT_SUFFIX_SPEC \"$spec\""
81fi
82