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# Generate a flat list of symbols to export.
# Copyright (C) 2007-2019 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 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]))
print sym;
}
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