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83dad10c RH |
1 | # Generate a flat list of symbols to export. |
2 | # Contributed by Richard Henderson <rth@cygnus.com> | |
3 | # | |
1322177d | 4 | # This file is part of GCC. |
83dad10c | 5 | # |
1322177d LB |
6 | # GCC is free software; you can redistribute it and/or modify it under |
7 | # the terms of the GNU General Public License as published by the Free | |
8 | # Software Foundation; either version 2, or (at your option) any later | |
9 | # version. | |
83dad10c | 10 | # |
1322177d LB |
11 | # GCC is distributed in the hope that it will be useful, but WITHOUT |
12 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | # License for more details. | |
83dad10c RH |
15 | # |
16 | # You should have received a copy of the GNU General Public License | |
1322177d | 17 | # along with GCC; see the file COPYING. If not, write to the Free |
366ccddb KC |
18 | # Software Foundation, 51 Franklin Street, Fifth Floor, Boston MA |
19 | # 02110-1301, USA. | |
83dad10c RH |
20 | |
21 | BEGIN { | |
22 | state = "nm"; | |
7c834753 ZW |
23 | excluding = 0; |
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 elide undefined symbols. | |
37 | ||
38 | state == "nm" && /^%%/ { | |
39 | state = "ver"; | |
40 | next; | |
41 | } | |
42 | ||
43 | state == "nm" && ($1 == "U" || $2 == "U") { | |
44 | next; | |
45 | } | |
46 | ||
47 | state == "nm" && NF == 3 { | |
48 | def[$3] = 1; | |
49 | next; | |
50 | } | |
51 | ||
52 | state == "nm" { | |
53 | next; | |
54 | } | |
55 | ||
56 | # Now we process a simplified variant of the Solaris symbol version | |
57 | # script. We have one symbol per line, no semicolons, simple markers | |
58 | # for beginning and ending each section, and %inherit markers for | |
59 | # describing version inheritence. A symbol may appear in more than | |
60 | # one symbol version, and the last seen takes effect. | |
7c834753 ZW |
61 | # The magic version name '%exclude' causes all the symbols given that |
62 | # version to be dropped from the output (unless a later version overrides). | |
83dad10c RH |
63 | |
64 | NF == 3 && $1 == "%inherit" { | |
65 | next; | |
66 | } | |
67 | ||
68 | NF == 2 && $2 == "{" { | |
7c834753 ZW |
69 | if ($1 == "%exclude") |
70 | excluding = 1; | |
83dad10c RH |
71 | next; |
72 | } | |
73 | ||
74 | $1 == "}" { | |
7c834753 | 75 | excluding = 0; |
83dad10c RH |
76 | next; |
77 | } | |
78 | ||
79 | { | |
7c834753 ZW |
80 | sym = prefix $1; |
81 | if (excluding) | |
82 | delete export[sym]; | |
83 | else | |
84 | export[sym] = 1; | |
83dad10c RH |
85 | next; |
86 | } | |
87 | ||
88 | END { | |
89 | for (sym in export) | |
90 | if (def[sym]) | |
91 | print sym; | |
92 | } |