libstdc++-v3/scripts/extract_symvers.in

   1 #!/bin/sh
   2
   3 # Copyright (C) 2002-2022 Free Software Foundation, Inc.
   4 #
   5 # This file is part of the GNU ISO C++ Library.  This library is free
   6 # software; you can redistribute it and/or modify it under the
   7 # terms of the GNU General Public License as published by the
   8 # Free Software Foundation; either version 3, or (at your option)
   9 # any later version.
  10 #
  11 # This library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License along
  17 # with this library; see the file COPYING3.  If not see
  18 # <http://www.gnu.org/licenses/>.
  19
  20
  21 if test ${#} -lt 2 || test $1 = '--help'; then
  22   echo "Usage:  extract_symvers  shared_lib output_file" 1>&2
  23   exit 1
  24 fi
  25
  26 lib=$1
  27 output=$2
  28
  29 # This avoids weird sorting problems later.
  30 LC_ALL=C
  31 export LC_ALL
  32 LANG=C
  33 export LANG
  34
  35 tmp=extract.$$
  36
  37 case `uname -s` in
  38 SunOS)
  39   # Ensure that output on Solaris 2 matches readelf below without requiring
  40   # GNU binutils to be installed.  This requires a combination of pvs and
  41   # elfdump, which is easier handled in a perl script.
  42   perl @glibcxx_srcdir@/scripts/extract_symvers.pl ${lib} > $tmp 2>&1
  43   ;;
  44 *)
  45   # GNU binutils, somewhere after version 2.11.2, requires -W/--wide to
  46   # avoid default line truncation.  -W is not supported and truncation did
  47   # not occur by default before that point.
  48   readelf="readelf --symbols"
  49   if readelf --help | grep -- --wide > /dev/null; then
  50     readelf="$readelf --wide"
  51   fi
  52   # Omit _DYNAMIC etc. for consistency with extract_symvers.pl, only
  53   # present on Solaris.
  54   ${readelf} ${lib} |\
  55   sed -e 's/ \[<other>: [A-Fa-f0-9]*\] //' -e '/\.dynsym/,/^$/p;d' |\
  56   sed -e 's/ \[<localentry>: [0-9]*\] //' |\
  57   egrep -v ' (LOCAL|UND) ' |\
  58   egrep -v ' (_DYNAMIC|_GLOBAL_OFFSET_TABLE_|_PROCEDURE_LINKAGE_TABLE_|_edata|_end|_etext)$' |\
  59   sed -e 's/ <processor specific>: / <processor_specific>:_/g' |\
  60   sed -e 's/ <OS specific>: / <OS_specific>:_/g' |\
  61   sed -e 's/ <unknown>: / <unknown>:_/g' |\
  62   awk '{ if ($4 == "FUNC" || $4 == "NOTYPE")
  63            printf "%s:%s\n", $4, $8;
  64          else if ($4 == "OBJECT" || $4 == "TLS")
  65            printf "%s:%s:%s\n", $4, $3, $8;
  66        }' | sort | uniq > $tmp 2>&1
  67 #        else printf "Huh?  What is %s?\n", $8;
  68   ;;
  69 esac
  70
  71 # I think we'll be doing some more with this file, but for now, dump.
  72 mv $tmp $output
  73
  74 exit 0