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4022d8ed | 1 | # awk script to generate errlist-compat.c |
b168057a | 2 | # Copyright (C) 2002-2015 Free Software Foundation, Inc. |
4022d8ed RM |
3 | # This file is part of the GNU C Library. |
4 | ||
5 | # The GNU C Library is free software; you can redistribute it and/or | |
6 | # modify it under the terms of the GNU Lesser General Public | |
7 | # License as published by the Free Software Foundation; either | |
8 | # version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | # The GNU C Library is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | # Lesser General Public License for more details. | |
14 | ||
15 | # You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | # License along with the GNU C Library; if not, see |
17 | # <http://www.gnu.org/licenses/>. | |
4022d8ed RM |
18 | |
19 | # | |
20 | # This script takes the Versions file as input and looks for #errlist-compat | |
21 | # magic comments, which have the form: | |
22 | # #errlist-compat NNN | |
23 | # where NNN is the number of elements in the sys_errlist for that version set. | |
24 | # We need the awk variable `maxerr' defined to the current size of sys_errlist. | |
25 | # | |
26 | # If there is no magic comment matching the current size, we barf. | |
27 | # Otherwise we generate code (errlist-compat.c) to define all the | |
28 | # necessary compatibility symbols for older, smaller versions of sys_errlist. | |
29 | # | |
30 | ||
4022d8ed RM |
31 | # These two rules catch the Versions file contents. |
32 | NF == 2 && $2 == "{" { last_version = $1; next } | |
33 | $1 == "#errlist-compat" { | |
5fe14d96 UD |
34 | # Don't process any further Versions files |
35 | ARGC = ARGIND + 1; | |
36 | cnt = $2 + 0; | |
c2b22a08 | 37 | if (cnt < 80) { |
4022d8ed RM |
38 | print "*** this line seems bogus:", $0 > "/dev/stderr"; |
39 | exit 1; | |
40 | } | |
5fe14d96 UD |
41 | version[pos + 0] = cnt SUBSEP last_version; |
42 | pos++; | |
43 | if (cnt < highest) { | |
44 | printf "*** %s #errlist-compat counts are not sorted\n", ARGV[ARGIND]; | |
45 | exit 1; | |
46 | } | |
47 | if (cnt > highest) | |
48 | highest = cnt; | |
49 | highest_version = last_version; | |
4022d8ed RM |
50 | next; |
51 | } | |
52 | ||
53 | END { | |
7a9ce79a RM |
54 | if (! highest_version) { |
55 | print "/* No sys_errlist/sys_nerr symbols defined on this platform. */"; | |
56 | exit 0; | |
57 | } | |
58 | ||
4022d8ed RM |
59 | count = maxerr + 1; |
60 | ||
4b359a27 | 61 | if (highest < count) { |
4022d8ed | 62 | printf "*** errlist.c count %d vs Versions sys_errlist@%s count %d\n", \ |
5fe14d96 | 63 | count, highest_version, highest > "/dev/stderr"; |
4022d8ed RM |
64 | exit 1; |
65 | } | |
66 | ||
67 | lastv = ""; | |
5fe14d96 UD |
68 | for (n = 0; n < pos; ++n) { |
69 | split(version[n], t, SUBSEP) | |
70 | v = t[2]; | |
71 | gsub(/[^A-Z0-9_]/, "_", v); | |
72 | if (lastv != "") | |
73 | compat[lastv] = v; | |
74 | lastv = v; | |
75 | vcount[v] = t[1]; | |
76 | } | |
4022d8ed RM |
77 | |
78 | print "/* This file was generated by errlist-compat.awk; DO NOT EDIT! */\n"; | |
79 | print "#include <shlib-compat.h>\n"; | |
80 | ||
4b359a27 RM |
81 | if (highest > count) { |
82 | printf "*** errlist.c count %d inflated to %s count %d (old errno.h?)\n", \ | |
83 | count, highest_version, highest > "/dev/stderr"; | |
ff3d51ec | 84 | printf "#define ERR_MAX %d\n\n", highest - 1; |
4b359a27 RM |
85 | } |
86 | ||
b1eeb65d CD |
87 | # same regardless of awk's ordering of the associative array. |
88 | num_compat_elems = asorti(compat, compat_indices) | |
89 | for (i = 1; i <= num_compat_elems; i++) { | |
90 | old = compat_indices[i] | |
4022d8ed RM |
91 | new = compat[old]; |
92 | n = vcount[old]; | |
93 | printf "#if SHLIB_COMPAT (libc, %s, %s)\n", old, new; | |
a7b8a17b | 94 | printf "# include <bits/wordsize.h>\n"; |
aa6938f7 | 95 | printf "extern const char *const __sys_errlist_%s[NERR];\n", old; |
4022d8ed | 96 | printf "const int __sys_nerr_%s = %d;\n", old, n; |
11bf311e UD |
97 | printf "declare_symbol_alias (__sys_errlist_%s, _sys_errlist_internal,", \ |
98 | old; | |
99 | printf " object, __WORDSIZE/8*%d)\n", n; | |
4022d8ed RM |
100 | printf "compat_symbol (libc, __sys_errlist_%s, sys_errlist, %s);\n", \ |
101 | old, old; | |
102 | printf "compat_symbol (libc, __sys_nerr_%s, sys_nerr, %s);\n", old, old; | |
103 | ||
aa6938f7 | 104 | printf "extern const char *const ___sys_errlist_%s[NERR];\n", old; |
4022d8ed | 105 | printf "extern const int __sys_nerr_%s;\n", old; |
11bf311e UD |
106 | printf "declare_symbol_alias (___sys_errlist_%s, _sys_errlist_internal,", \ |
107 | old; | |
108 | printf " object, __WORDSIZE/8*%d)\n", n; | |
4022d8ed RM |
109 | printf "strong_alias (__sys_nerr_%s, ___sys_nerr_%s)\n", old, old; |
110 | printf "compat_symbol (libc, ___sys_errlist_%s, _sys_errlist, %s);\n", \ | |
111 | old, old; | |
112 | printf "compat_symbol (libc, ___sys_nerr_%s, _sys_nerr, %s);\n", old, old; | |
113 | printf "#endif\n\n"; | |
114 | } | |
115 | ||
116 | printf "\ | |
2103c260 | 117 | extern const char *const __sys_errlist_internal[NERR];\n\ |
4022d8ed RM |
118 | extern const int __sys_nerr_internal;\n\ |
119 | strong_alias (_sys_errlist_internal, __sys_errlist_internal)\n\ | |
120 | strong_alias (_sys_nerr_internal, __sys_nerr_internal)\n\ | |
2103c260 | 121 | extern const char *const sys_errlist[NERR];\n\ |
4022d8ed RM |
122 | versioned_symbol (libc, _sys_errlist_internal, sys_errlist, %s);\n\ |
123 | versioned_symbol (libc, __sys_errlist_internal, _sys_errlist, %s);\n\ | |
124 | versioned_symbol (libc, _sys_nerr_internal, sys_nerr, %s);\n\ | |
125 | versioned_symbol (libc, __sys_nerr_internal, _sys_nerr, %s);\n", \ | |
126 | lastv, lastv, lastv, lastv; | |
1ce8aaae RM |
127 | |
128 | print "\n\ | |
129 | link_warning (sys_errlist, \"\ | |
130 | `sys_errlist' is deprecated; use `strerror' or `strerror_r' instead\")\n\ | |
131 | link_warning (sys_nerr, \"\ | |
132 | `sys_nerr' is deprecated; use `strerror' or `strerror_r' instead\")"; | |
4022d8ed | 133 | } |