sys-devel/native-cctools/files/aix-mkexpfile-1


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#! /usr/bin/env bash
# Copyright 2013-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-devel/native-cctools/files/aix-mkexpfile-1,v 1.1 2013/11/05 15:03:13 haubi Exp $

# Creating shared libraries on AIX involves lots of commands. While there is
# the ld-wrapper supporting the '-soname' flag already, it also is necessary
# to create the list of exported symbols from all the local object files only,
# because with the -bexpfull linker flag we would export symbols from static
# objects found in libc.a too, which should be privately linked into
# subsequent shared libs instead of importing them from current sharedlib.

# Also, -bexpfull may trigger this AIX 7.1 kernel bug:
# https://www-304.ibm.com/support/docview.wss?uid=isg1IV39558

# Example to use this helper script, in combination with ld-wrapper:
# gcc -shared -soname=lib.so.1 -o lib.so *.o -Wl,-bexport:`mkexpfile *.o`

nm=${0%mkexpfile}nm
showwith=
expfile="ld.aix.exports.$$"
srcobjs=()

while [[ $# -gt 0 ]]
do
    arg=$1
    shift

    case ${arg} in
    --) srcobjs=( "${srcobjs[@]}" "$@" ); break ;;
    --show-with=*) showwith=${arg#--show-with=} ;;
    -o) expfile=$1; shift ;;
    -o*) expfile=${arg#-o}; ;;
    *) srcobjs=( "${srcobjs[@]}" "${arg}" ) ;;
    esac
done

rm -f "${expfile}" || exit 1

type ${nm} >/dev/null 2>&1 || nm=nm

${nm} -PCpgl "${srcobjs[@]}" |
  awk '{
    if ((($2 == "T") || ($2 == "D") || ($2 == "B") || ($2 == "W") || ($2 == "V") || ($2 == "Z")) && (substr($1,1,1) != ".")) {
      if (($2 == "W") || ($2 == "V") || ($2 == "Z")) {
	print $1 " weak"
      } else {
	print $1
      }
    }
  }' |
  sort -u > "${expfile}" || exit 1

printf "%s\n" "${showwith}${expfile}"

exit 0