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1 #!/bin/sh
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2 # Copyright (C) 2006-2020 Free Software Foundation, Inc.
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3 # This file is part of GCC.
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4
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5 # GCC is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 3, or (at your option)
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8 # any later version.
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9
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10 # GCC is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14
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15 # You should have received a copy of the GNU General Public License
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16 # along with GCC; see the file COPYING3. If not see
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17 # <http://www.gnu.org/licenses/>.
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18
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19 # This script takes the following arguments:
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20 #
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21 # - the target sysroot
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22 # - the value of $(MULTILIB_MATCHES)
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23 # - the value of $(MULTILIB_OPTIONS)
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24 #
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25 # It uses these arguments to construct a definition of SYSROOT_SUFFIX_SPEC,
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26 # which it prints to the standard output. For each multilib directory FOO,
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27 # the script checks whether $sysroot has a subdirectory FOO, and if so will
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28 # use /FOO for all compatible command-line options. It will not add a
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29 # suffix for /FOO's options otherwise. These suffixes are concatenated,
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30 # with one subspec for each space-separated entry in $(MULTILIB_OPTIONS).
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31 set -e
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32 sysroot=$1
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33 matches=$2
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34 options=$3
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35
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36 # For each multilib option OPT, add to $substs a sed command of the
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37 # form "-e 's/OPT/OPT/'".
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38 substs=""
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39 for option in `echo "$options" | tr '/' ' '`
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40 do
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41 substs="$substs -e 's/$option/$option/g'"
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42 done
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43
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44 # For each ALIAS=CANONICAL entry in $MULTILIB_MATCHES, look for sed
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45 # arguments in $substs of the form "-e 's/CANONICAL/.../'". Replace
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46 # such entries with "-e 's/CANONICAL/ALIAS|.../'". Both the ALIAS and
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47 # CANONICAL parts of $MULTILIB_MATCHES use '?' to stand for '='.
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48 #
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49 # After this loop, a command of the form "echo FOO | eval sed $substs"
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50 # will replace a canonical option FOO with a %{...}-style spec pattern.
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51 for match in $matches
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52 do
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53 canonical=`echo "$match" | sed -e 's/=.*//' -e 's/?/=/g'`
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54 alias=`echo "$match" | sed -e 's/.*=//' -e 's/?/=/g'`
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55 substs=`echo "$substs" | sed -e "s,s/$canonical/,&$alias|,"`
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56 done
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57
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58 # Build up the final SYSROOT_SUFFIX_SPEC in $spec.
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59 spec=
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60 for combo in $options
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61 do
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62 # See which option alternatives in $combo have their own sysroot
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63 # directory. Create a subspec of the form "%{PAT1:/DIR1;...;PATn:DIRn}"
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64 # from each such option OPTi, where DIRi is the directory associated
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65 # with OPTi and PATi is the result of passing OPTi through $substs.
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66 subspec=
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67 for option in `echo "$combo" | tr '/' ' '`
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68 do
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69 dir=`echo "$option" | sed 's/cpu=//'`
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70 if test -d "$sysroot/$dir"; then
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71 test -z "$subspec" || subspec="$subspec;"
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72 subspec="$subspec"`echo "$option" | eval sed $substs`":/$dir"
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73 fi
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74 done
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75 # Concatenate all the subspecs.
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76 test -z "$subspec" || spec="$spec%{$subspec}"
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77 done
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78 if test -n "$spec"; then
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79 echo "#undef SYSROOT_SUFFIX_SPEC"
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80 echo "#define SYSROOT_SUFFIX_SPEC \"$spec\""
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81 fi
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