gcc/
[official-gcc.git] / libgcc / mkmap-flat.awk
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1 # Generate a flat list of symbols to export.
2 # Copyright (C) 2007-2015 Free Software Foundation, Inc.
3 # Contributed by Richard Henderson <rth@cygnus.com>
5 # This file is part of GCC.
7 # GCC is free software; you can redistribute it and/or modify it under
8 # the terms of the GNU General Public License as published by the Free
9 # Software Foundation; either version 3, or (at your option) any later
10 # version.
12 # GCC is distributed in the hope that it will be useful, but WITHOUT
13 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 # License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GCC; see the file COPYING3. If not see
19 # <http://www.gnu.org/licenses/>.
21 # Options:
22 # "-v leading_underscore=1" : Symbols in map need leading underscore.
23 # "-v pe_dll=1" : Create .DEF file for Windows PECOFF
24 # DLL link instead of map file.
26 BEGIN {
27 state = "nm";
28 excluding = 0;
29 if (leading_underscore)
30 prefix = "_";
31 else
32 prefix = "";
35 # Remove comment and blank lines.
36 /^ *#/ || /^ *$/ {
37 next;
40 # We begin with nm input. Collect the set of symbols that are present
41 # so that we can elide undefined symbols.
43 state == "nm" && /^%%/ {
44 state = "ver";
45 next;
48 state == "nm" && ($1 == "U" || $2 == "U") {
49 next;
52 state == "nm" && NF == 3 {
53 def[$3] = 1;
54 next;
57 state == "nm" {
58 next;
61 # Now we process a simplified variant of the Solaris symbol version
62 # script. We have one symbol per line, no semicolons, simple markers
63 # for beginning and ending each section, and %inherit markers for
64 # describing version inheritance. A symbol may appear in more than
65 # one symbol version, and the last seen takes effect.
66 # The magic version name '%exclude' causes all the symbols given that
67 # version to be dropped from the output (unless a later version overrides).
69 NF == 3 && $1 == "%inherit" {
70 next;
73 NF == 2 && $2 == "{" {
74 if ($1 == "%exclude")
75 excluding = 1;
76 next;
79 $1 == "}" {
80 excluding = 0;
81 next;
85 sym = prefix $1;
86 if (excluding)
87 delete export[sym];
88 else
89 export[sym] = 1;
90 next;
93 END {
95 if (pe_dll) {
96 print "LIBRARY " pe_dll;
97 print "EXPORTS";
100 for (sym in export)
101 if (def[sym] || (pe_dll && def["_" sym]))
102 print sym;