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120 lines
2.8 KiB
Awk
120 lines
2.8 KiB
Awk
# Generate a flat list of symbols to export.
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# Copyright (C) 2007-2019 Free Software Foundation, Inc.
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# Contributed by Richard Henderson <rth@cygnus.com>
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#
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# This file is part of GCC.
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#
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# GCC is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 3, or (at your option) any later
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# version.
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#
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# GCC is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GCC; see the file COPYING3. If not see
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# <http://www.gnu.org/licenses/>.
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# Options:
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# "-v leading_underscore=1" : Symbols in map need leading underscore.
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# "-v pe_def=xxx" : Add description to .DEF file
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# "-v pe_dll=1" : Create .DEF file for Windows PECOFF
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# DLL link instead of map file.
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function cmp_string(i1, v1, i2, v2)
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{
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# string value (and index) comparison, descending order
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v1 = v1 i1
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v2 = v2 i2
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return (v1 > v2) ? -1 : (v1 != v2)
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}
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BEGIN {
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state = "nm";
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excluding = 0;
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if (leading_underscore)
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prefix = "_";
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else
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prefix = "";
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}
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# Remove comment and blank lines.
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/^ *#/ || /^ *$/ {
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next;
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}
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# We begin with nm input. Collect the set of symbols that are present
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# so that we can elide undefined symbols.
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state == "nm" && /^%%/ {
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state = "ver";
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next;
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}
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state == "nm" && ($1 == "U" || $2 == "U") {
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next;
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}
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state == "nm" && NF == 3 {
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def[$3] = 1;
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next;
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}
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state == "nm" {
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next;
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}
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# Now we process a simplified variant of the Solaris symbol version
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# script. We have one symbol per line, no semicolons, simple markers
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# for beginning and ending each section, and %inherit markers for
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# describing version inheritance. A symbol may appear in more than
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# one symbol version, and the last seen takes effect.
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# The magic version name '%exclude' causes all the symbols given that
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# version to be dropped from the output (unless a later version overrides).
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NF == 3 && $1 == "%inherit" {
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next;
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}
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NF == 2 && $2 == "{" {
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if ($1 == "%exclude")
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excluding = 1;
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next;
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}
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$1 == "}" {
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excluding = 0;
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next;
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}
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{
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sym = prefix $1;
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if (excluding)
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delete export[sym];
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else
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export[sym] = 1;
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next;
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}
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END {
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if (pe_def) {
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print "LIBRARY " pe_dll " INITINSTANCE TERMINSTANCE";
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print "DATA MULTIPLE";
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print "DESCRIPTION \"" pe_def "\"";
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print "EXPORTS";
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} else
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if (pe_dll) {
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print "LIBRARY " pe_dll;
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print "EXPORTS";
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}
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PROCINFO["sorted_in"] = "cmp_string"
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for (sym in export)
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if (def[sym] || (pe_dll && def["_" sym]))
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print sym;
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}
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