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#!/bin/sh
# Copyright (C) 2002-2013 Free Software Foundation, Inc.
#
# This file is part of the GNU ISO C++ Library. This library 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.
#
# This library 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 this library; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
if test ${#} -lt 2 || test $1 = '--help'; then
echo "Usage: extract_symvers shared_lib output_file" 1>&2
exit 1
fi
lib=$1
output=$2
# This avoids weird sorting problems later.
LC_ALL=C
export LC_ALL
LANG=C
export LANG
tmp=extract.$$
case `uname -s` in
SunOS)
# Ensure that output on Solaris 2 matches readelf below without requiring
# GNU binutils to be installed. This requires a combination of pvs and
# elfdump, which is easier handled in a perl script.
perl @glibcxx_srcdir@/scripts/extract_symvers.pl ${lib} > $tmp 2>&1
;;
*)
# GNU binutils, somewhere after version 2.11.2, requires -W/--wide to
# avoid default line truncation. -W is not supported and truncation did
# not occur by default before that point.
readelf="readelf --symbols"
if readelf --help | grep -- --wide > /dev/null; then
readelf="$readelf --wide"
fi
# Omit _DYNAMIC etc. for consistency with extract_symvers.pl, only
# present on Solaris.
${readelf} ${lib} |\
sed -e 's/ \[<other>: [A-Fa-f0-9]*\] //' -e '/\.dynsym/,/^$/p;d' |\
egrep -v ' (LOCAL|UND) ' |\
egrep -v ' (_DYNAMIC|_GLOBAL_OFFSET_TABLE_|_PROCEDURE_LINKAGE_TABLE_|_edata|_end|_etext)$' |\
sed -e 's/ <processor specific>: / <processor_specific>:_/g' |\
sed -e 's/ <OS specific>: / <OS_specific>:_/g' |\
sed -e 's/ <unknown>: / <unknown>:_/g' |\
awk '{ if ($4 == "FUNC" || $4 == "NOTYPE")
printf "%s:%s\n", $4, $8;
else if ($4 == "OBJECT" || $4 == "TLS")
printf "%s:%s:%s\n", $4, $3, $8;
}' | sort | uniq > $tmp 2>&1
# else printf "Huh? What is %s?\n", $8;
;;
esac
# I think we'll be doing some more with this file, but for now, dump.
mv $tmp $output
exit 0
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