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# Generate a flat list of symbols to export.

#       Copyright (C) 2007, 2008, 2009, 2011  Free Software Foundation, Inc.

#       Contributed by Richard Henderson <rth@cygnus.com>

#

# This file is part of GCC.

#

# GCC 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.

#

# GCC 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 GCC; see the file COPYING3.  If not see

# <http://www.gnu.org/licenses/>.

# Options:

#   "-v leading_underscore=1" : Symbols in map need leading underscore.

#   "-v osf_export=1"         : Create -input file for Tru64 UNIX linker

#                               instead of map file.

#   "-v pe_dll=1"             : Create .DEF file for Windows PECOFF

#                               DLL link instead of map file.

BEGIN {

  state = "nm";

  excluding = 0;

  if (leading_underscore)

    prefix = "_";

  else

    prefix = "";

}

# Remove comment and blank lines.

/^ *#/ || /^ *$/ {

  next;

}

# We begin with nm input.  Collect the set of symbols that are present

# so that we can elide undefined symbols.

state == "nm" && /^%%/ {

  state = "ver";

  next;

}

state == "nm" && ($1 == "U" || $2 == "U") {

  next;

}

state == "nm" && NF == 3 {

  def[$3] = 1;

  next;

}

state == "nm" {

  next;

}

# Now we process a simplified variant of the Solaris symbol version

# script.  We have one symbol per line, no semicolons, simple markers

# for beginning and ending each section, and %inherit markers for

# describing version inheritance.  A symbol may appear in more than

# one symbol version, and the last seen takes effect.

# The magic version name '%exclude' causes all the symbols given that

# version to be dropped from the output (unless a later version overrides).

NF == 3 && $1 == "%inherit" {

  next;

}

NF == 2 && $2 == "{" {

  if ($1 == "%exclude")

    excluding = 1;

  next;

}

$1 == "}" {

  excluding = 0;

  next;

}

{

  sym = prefix $1;

  if (excluding)

    delete export[sym];

  else

    export[sym] = 1;

  next;

}

END {

  if (pe_dll) {

    print "LIBRARY " pe_dll;

    print "EXPORTS";

  }

  for (sym in export)

    if (def[sym] || (pe_dll && def["_" sym])) {

      if (!osf_export)

        print sym;

      else

        print "-exported_symbol " sym;

    }

}