1 # Generate an ELF symbol version map a-la Solaris and GNU ld.
2 # Copyright (C) 2007, 2008 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
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/>.
24 if (leading_underscore)
30 # Remove comment and blank lines.
35 # We begin with nm input. Collect the set of symbols that are present
36 # so that we can not emit them into the final version script -- Solaris
37 # complains at us if we do.
39 state == "nm" && /^%%/ {
44 state == "nm" && ($1 == "U" || $2 == "U") {
48 state == "nm" && NF == 3 {
59 # Now we process a simplified variant of the Solaris symbol version
60 # script. We have one symbol per line, no semicolons, simple markers
61 # for beginning and ending each section, and %inherit markers for
62 # describing version inheritance. A symbol may appear in more than
63 # one symbol version, and the last seen takes effect.
64 # The magic version name '%exclude' causes all the symbols given that
65 # version to be dropped from the output (unless a later version overrides).
67 NF == 3 && $1 == "%inherit" {
72 NF == 2 && $2 == "{" {
87 if (thislib != "%exclude")
88 ver[sym, thislib] = 1;
99 print "No symbols seen -- broken or mis-installed nm?" | "cat 1>&2";
106 function output(lib) {
111 output(inherit[lib]);
115 if ((ver[sym, lib] != 0) && (sym in def))
119 printf("%s {\n", lib);
120 printf(" global:\n");
123 printf("\t%s;\n", sym);
129 if (inherit[l] == lib)
130 inherit[l] = inherit[lib];
132 else if (inherit[lib])
133 printf("} %s;\n", inherit[lib]);
135 printf ("\n local:\n\t*;\n};\n");