gcc/config/bfin/print-sysroot-suffix.sh

   1 #!/bin/sh
   2 # Copyright (C) 2007-2014 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).
  31 set -e
  32 sysroot=$1
  33 matches=$2
  34 options=$3
  35
  36 # For each multilib option OPT, add to $substs a sed command of the
  37 # form "-e 's/OPT/OPT/'".
  38 substs=""
  39 for option in `echo "$options" | tr '/' ' '`
  40 do
  41   substs="$substs -e 's/$option/$option/g'"
  42 done
  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.
  51 for match in $matches
  52 do
  53   canonical=`echo "$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|,"`
  56 done
  57
  58 # Build up the final SYSROOT_SUFFIX_SPEC in $spec.
  59 spec=
  60 for combo in $options
  61 do
  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 "$option" | sed 's/mcpu=//'`
  70     if test -d "$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%{$subspec}"
  77 done
  78 if test -n "$spec"; then
  79   echo "#undef SYSROOT_SUFFIX_SPEC"
  80   echo "#define SYSROOT_SUFFIX_SPEC \"$spec\""
  81 fi