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83dad10c | 1 | # Generate an ELF symbol version map a-la Solaris and GNU ld. |
9dcd6f09 | 2 | # Copyright (C) 2007 Free Software Foundation, Inc. |
83dad10c RH |
3 | # Contributed by Richard Henderson <rth@cygnus.com> |
4 | # | |
1322177d | 5 | # This file is part of GCC. |
83dad10c | 6 | # |
1322177d LB |
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 | |
9dcd6f09 | 9 | # Software Foundation; either version 3, or (at your option) any later |
1322177d | 10 | # version. |
83dad10c | 11 | # |
1322177d LB |
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. | |
83dad10c RH |
16 | # |
17 | # You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | # along with GCC; see the file COPYING3. If not see |
19 | # <http://www.gnu.org/licenses/>. | |
83dad10c RH |
20 | |
21 | BEGIN { | |
22 | state = "nm"; | |
5a5c00af | 23 | sawsymbol = 0; |
7c834753 ZW |
24 | if (leading_underscore) |
25 | prefix = "_"; | |
26 | else | |
27 | prefix = ""; | |
83dad10c RH |
28 | } |
29 | ||
30 | # Remove comment and blank lines. | |
31 | /^ *#/ || /^ *$/ { | |
32 | next; | |
33 | } | |
34 | ||
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. | |
38 | ||
39 | state == "nm" && /^%%/ { | |
40 | state = "ver"; | |
41 | next; | |
42 | } | |
43 | ||
44 | state == "nm" && ($1 == "U" || $2 == "U") { | |
45 | next; | |
46 | } | |
47 | ||
48 | state == "nm" && NF == 3 { | |
49 | def[$3] = 1; | |
5a5c00af | 50 | sawsymbol = 1; |
83dad10c RH |
51 | next; |
52 | } | |
53 | ||
54 | state == "nm" { | |
55 | next; | |
56 | } | |
57 | ||
58 | # Now we process a simplified variant of the Solaris symbol version | |
59 | # script. We have one symbol per line, no semicolons, simple markers | |
60 | # for beginning and ending each section, and %inherit markers for | |
61 | # describing version inheritence. A symbol may appear in more than | |
62 | # one symbol version, and the last seen takes effect. | |
7c834753 ZW |
63 | # The magic version name '%exclude' causes all the symbols given that |
64 | # version to be dropped from the output (unless a later version overrides). | |
83dad10c RH |
65 | |
66 | NF == 3 && $1 == "%inherit" { | |
67 | inherit[$2] = $3; | |
68 | next; | |
69 | } | |
70 | ||
71 | NF == 2 && $2 == "{" { | |
7c834753 ZW |
72 | if ($1 != "%exclude") |
73 | libs[$1] = 1; | |
83dad10c RH |
74 | thislib = $1; |
75 | next; | |
76 | } | |
77 | ||
78 | $1 == "}" { | |
79 | thislib = ""; | |
80 | next; | |
81 | } | |
82 | ||
83 | { | |
7c834753 ZW |
84 | sym = prefix $1; |
85 | if (thislib != "%exclude") | |
86 | ver[sym] = thislib; | |
87 | else | |
88 | delete ver[sym]; | |
83dad10c RH |
89 | next; |
90 | } | |
91 | ||
92 | END { | |
5a5c00af RH |
93 | if (!sawsymbol) |
94 | { | |
95 | print "No symbols seen -- broken or mis-installed nm?" | "cat 1>&2"; | |
96 | exit 1; | |
97 | } | |
83dad10c RH |
98 | for (l in libs) |
99 | output(l); | |
100 | } | |
101 | ||
102 | function output(lib) { | |
103 | if (done[lib]) | |
104 | return; | |
105 | done[lib] = 1; | |
106 | if (inherit[lib]) | |
107 | output(inherit[lib]); | |
108 | ||
bc93e287 | 109 | empty=1 |
83dad10c RH |
110 | for (sym in ver) |
111 | if ((ver[sym] == lib) && (sym in def)) | |
bac015e7 | 112 | { |
bc93e287 | 113 | if (empty) |
5a5c00af | 114 | { |
bc93e287 | 115 | printf("%s {\n", lib); |
5a5c00af | 116 | printf(" global:\n"); |
bc93e287 | 117 | empty = 0; |
5a5c00af | 118 | } |
bac015e7 | 119 | printf("\t%s;\n", sym); |
bac015e7 | 120 | } |
83dad10c | 121 | |
bc93e287 JJ |
122 | if (empty) |
123 | { | |
124 | for (l in libs) | |
125 | if (inherit[l] == lib) | |
126 | inherit[l] = inherit[lib]; | |
127 | } | |
128 | else if (inherit[lib]) | |
83dad10c RH |
129 | printf("} %s;\n", inherit[lib]); |
130 | else | |
131 | printf ("\n local:\n\t*;\n};\n"); | |
132 | } |