Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | #!./miniperl -w |
8990e307 | 2 | |
ebc74a4b GS |
3 | my $config_pm = $ARGV[0] || 'lib/Config.pm'; |
4 | my $glossary = $ARGV[1] || 'Porting/Glossary'; | |
8990e307 LW |
5 | @ARGV = "./config.sh"; |
6 | ||
a0d0e21e | 7 | # list names to put first (and hence lookup fastest) |
3c81428c | 8 | @fast = qw(archname osname osvers prefix libs libpth |
9 | dynamic_ext static_ext extensions dlsrc so | |
743c51bc | 10 | sig_name sig_num cc ccflags cppflags |
3c81428c | 11 | privlibexp archlibexp installprivlib installarchlib |
a0d0e21e | 12 | sharpbang startsh shsharp |
3c81428c | 13 | ); |
a0d0e21e | 14 | |
fec02dd3 AD |
15 | # names of things which may need to have slashes changed to double-colons |
16 | @extensions = qw(dynamic_ext static_ext extensions known_extensions); | |
17 | ||
a0d0e21e LW |
18 | |
19 | open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; | |
a5f75d66 | 20 | $myver = $]; |
3c81428c | 21 | |
a0d0e21e | 22 | print CONFIG <<"ENDOFBEG"; |
8990e307 | 23 | package Config; |
3c81428c | 24 | use Exporter (); |
8990e307 LW |
25 | \@ISA = (Exporter); |
26 | \@EXPORT = qw(%Config); | |
3c81428c | 27 | \@EXPORT_OK = qw(myconfig config_sh config_vars); |
8990e307 | 28 | |
a5f75d66 | 29 | \$] == $myver |
9193ea20 | 30 | or die "Perl lib version ($myver) doesn't match executable version (\$])"; |
8990e307 | 31 | |
a0d0e21e LW |
32 | # This file was created by configpm when Perl was built. Any changes |
33 | # made to this file will be lost the next time perl is built. | |
34 | ||
8990e307 LW |
35 | ENDOFBEG |
36 | ||
16d20bd9 | 37 | |
a0d0e21e | 38 | @fast{@fast} = @fast; |
fec02dd3 | 39 | @extensions{@extensions} = @extensions; |
a0d0e21e LW |
40 | @non_v=(); |
41 | @v_fast=(); | |
42 | @v_others=(); | |
44a8e56a | 43 | $in_v = 0; |
a0d0e21e | 44 | |
85e6fe83 | 45 | while (<>) { |
a0d0e21e LW |
46 | next if m:^#!/bin/sh:; |
47 | # Catch CONFIG=true and PATCHLEVEL=n line from Configure. | |
48 | s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/; | |
435ec615 HM |
49 | # We can delimit things in config.sh with either ' or ". |
50 | unless ($in_v or m/^(\w+)=(['"])(.*\n)/){ | |
a0d0e21e LW |
51 | push(@non_v, "#$_"); # not a name='value' line |
52 | next; | |
53 | } | |
435ec615 | 54 | $quote = $2; |
44a8e56a | 55 | if ($in_v) { $val .= $_; } |
435ec615 HM |
56 | else { ($name,$val) = ($1,$3); } |
57 | $in_v = $val !~ /$quote\n/; | |
44a8e56a | 58 | next if $in_v; |
fec02dd3 | 59 | if ($extensions{$name}) { s,/,::,g } |
435ec615 HM |
60 | if (!$fast{$name}){ push(@v_others, "$name=$quote$val"); next; } |
61 | push(@v_fast,"$name=$quote$val"); | |
a0d0e21e LW |
62 | } |
63 | ||
64 | foreach(@non_v){ print CONFIG $_ } | |
65 | ||
66 | print CONFIG "\n", | |
3c81428c | 67 | "my \$config_sh = <<'!END!';\n", |
a0d0e21e | 68 | join("", @v_fast, sort @v_others), |
3c81428c | 69 | "!END!\n\n"; |
70 | ||
71 | # copy config summary format from the myconfig script | |
72 | ||
73 | print CONFIG "my \$summary = <<'!END!';\n"; | |
74 | ||
75 | open(MYCONFIG,"<myconfig") || die "open myconfig failed: $!"; | |
54310121 | 76 | 1 while defined($_ = <MYCONFIG>) && !/^Summary of/; |
77 | do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/; | |
3c81428c | 78 | close(MYCONFIG); |
a0d0e21e | 79 | |
3c81428c | 80 | print CONFIG "\n!END!\n", <<'EOT'; |
81 | my $summary_expanded = 0; | |
82 | ||
83 | sub myconfig { | |
84 | return $summary if $summary_expanded; | |
ca8cad5c TB |
85 | $summary =~ s{\$(\w+)} |
86 | { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; | |
3c81428c | 87 | $summary_expanded = 1; |
88 | $summary; | |
89 | } | |
90 | EOT | |
91 | ||
92 | # ---- | |
a0d0e21e LW |
93 | |
94 | print CONFIG <<'ENDOFEND'; | |
95 | ||
a0d0e21e | 96 | sub FETCH { |
aa1bdcb8 | 97 | # check for cached value (which may be undef so we use exists not defined) |
a0d0e21e | 98 | return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]}); |
aa1bdcb8 TP |
99 | |
100 | # Search for it in the big string | |
435ec615 HM |
101 | my($value, $start, $marker, $quote_type); |
102 | $marker = "$_[1]="; | |
103 | $quote_type = "'"; | |
aa1bdcb8 | 104 | # return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); |
435ec615 HM |
105 | # Check for the common case, ' delimeted |
106 | $start = index($config_sh, "\n$marker$quote_type"); | |
107 | # If that failed, check for " delimited | |
108 | if ($start == -1) { | |
109 | $quote_type = '"'; | |
110 | $start = index($config_sh, "\n$marker$quote_type"); | |
111 | } | |
aa1bdcb8 TP |
112 | return undef if ( ($start == -1) && # in case it's first |
113 | (substr($config_sh, 0, length($marker)) ne $marker) ); | |
435ec615 HM |
114 | if ($start == -1) { |
115 | # It's the very first thing we found. Skip $start forward | |
116 | # and figure out the quote mark after the =. | |
117 | $start = length($marker) + 1; | |
118 | $quote_type = substr($config_sh, $start - 1, 1); | |
119 | } | |
120 | else { | |
121 | $start += length($marker) + 2; | |
122 | } | |
aa1bdcb8 | 123 | $value = substr($config_sh, $start, |
435ec615 | 124 | index($config_sh, "$quote_type\n", $start) - $start); |
a0d0e21e | 125 | |
435ec615 HM |
126 | # If we had a double-quote, we'd better eval it so escape |
127 | # sequences and such can be interpolated. Since the incoming | |
128 | # value is supposed to follow shell rules and not perl rules, | |
129 | # we escape any perl variable markers | |
130 | if ($quote_type eq '"') { | |
131 | $value =~ s/\$/\\\$/g; | |
132 | $value =~ s/\@/\\\@/g; | |
133 | eval "\$value = \"$value\""; | |
134 | } | |
135 | #$value = sprintf($value) if $quote_type eq '"'; | |
a0d0e21e LW |
136 | $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}". |
137 | $_[0]->{$_[1]} = $value; # cache it | |
138 | return $value; | |
139 | } | |
140 | ||
3c81428c | 141 | my $prevpos = 0; |
142 | ||
a0d0e21e LW |
143 | sub FIRSTKEY { |
144 | $prevpos = 0; | |
aa1bdcb8 TP |
145 | # my($key) = $config_sh =~ m/^(.*?)=/; |
146 | substr($config_sh, 0, index($config_sh, '=') ); | |
147 | # $key; | |
a0d0e21e LW |
148 | } |
149 | ||
150 | sub NEXTKEY { | |
435ec615 HM |
151 | # Find out how the current key's quoted so we can skip to its end. |
152 | my $quote = substr($config_sh, index($config_sh, "=", $prevpos)+1, 1); | |
153 | my $pos = index($config_sh, qq($quote\n), $prevpos) + 2; | |
3c81428c | 154 | my $len = index($config_sh, "=", $pos) - $pos; |
a0d0e21e | 155 | $prevpos = $pos; |
3c81428c | 156 | $len > 0 ? substr($config_sh, $pos, $len) : undef; |
85e6fe83 | 157 | } |
a0d0e21e | 158 | |
3c81428c | 159 | sub EXISTS { |
aa1bdcb8 TP |
160 | # exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; |
161 | exists($_[0]->{$_[1]}) or | |
162 | index($config_sh, "\n$_[1]='") != -1 or | |
435ec615 HM |
163 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]='" or |
164 | index($config_sh, "\n$_[1]=\"") != -1 or | |
165 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]=\""; | |
a0d0e21e LW |
166 | } |
167 | ||
3c81428c | 168 | sub STORE { die "\%Config::Config is read-only\n" } |
169 | sub DELETE { &STORE } | |
170 | sub CLEAR { &STORE } | |
a0d0e21e | 171 | |
3c81428c | 172 | |
173 | sub config_sh { | |
174 | $config_sh | |
748a9306 | 175 | } |
9193ea20 | 176 | |
177 | sub config_re { | |
178 | my $re = shift; | |
179 | my @matches = ($config_sh =~ /^$re=.*\n/mg); | |
180 | @matches ? (print @matches) : print "$re: not found\n"; | |
181 | } | |
182 | ||
3c81428c | 183 | sub config_vars { |
184 | foreach(@_){ | |
9193ea20 | 185 | config_re($_), next if /\W/; |
3c81428c | 186 | my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; |
187 | $v='undef' unless defined $v; | |
188 | print "$_='$v';\n"; | |
189 | } | |
190 | } | |
191 | ||
9193ea20 | 192 | ENDOFEND |
193 | ||
194 | if ($^O eq 'os2') { | |
195 | print CONFIG <<'ENDOFSET'; | |
196 | my %preconfig; | |
197 | if ($OS2::is_aout) { | |
198 | my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m; | |
199 | for (split ' ', $value) { | |
200 | ($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m; | |
201 | $preconfig{$_} = $v eq 'undef' ? undef : $v; | |
202 | } | |
203 | } | |
204 | sub TIEHASH { bless {%preconfig} } | |
205 | ENDOFSET | |
206 | } else { | |
207 | print CONFIG <<'ENDOFSET'; | |
208 | sub TIEHASH { bless {} } | |
209 | ENDOFSET | |
210 | } | |
211 | ||
212 | print CONFIG <<'ENDOFTAIL'; | |
213 | ||
fb73857a | 214 | # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD |
215 | sub DESTROY { } | |
216 | ||
9193ea20 | 217 | tie %Config, 'Config'; |
218 | ||
3c81428c | 219 | 1; |
220 | __END__ | |
748a9306 | 221 | |
3c81428c | 222 | =head1 NAME |
a0d0e21e | 223 | |
3c81428c | 224 | Config - access Perl configuration information |
225 | ||
226 | =head1 SYNOPSIS | |
227 | ||
228 | use Config; | |
229 | if ($Config{'cc'} =~ /gcc/) { | |
230 | print "built by gcc\n"; | |
231 | } | |
232 | ||
233 | use Config qw(myconfig config_sh config_vars); | |
234 | ||
235 | print myconfig(); | |
236 | ||
237 | print config_sh(); | |
238 | ||
239 | config_vars(qw(osname archname)); | |
240 | ||
241 | ||
242 | =head1 DESCRIPTION | |
243 | ||
244 | The Config module contains all the information that was available to | |
245 | the C<Configure> program at Perl build time (over 900 values). | |
246 | ||
247 | Shell variables from the F<config.sh> file (written by Configure) are | |
248 | stored in the readonly-variable C<%Config>, indexed by their names. | |
249 | ||
250 | Values stored in config.sh as 'undef' are returned as undefined | |
1fef88e7 | 251 | values. The perl C<exists> function can be used to check if a |
3c81428c | 252 | named variable exists. |
253 | ||
254 | =over 4 | |
255 | ||
256 | =item myconfig() | |
257 | ||
258 | Returns a textual summary of the major perl configuration values. | |
259 | See also C<-V> in L<perlrun/Switches>. | |
260 | ||
261 | =item config_sh() | |
262 | ||
263 | Returns the entire perl configuration information in the form of the | |
264 | original config.sh shell variable assignment script. | |
265 | ||
266 | =item config_vars(@names) | |
267 | ||
268 | Prints to STDOUT the values of the named configuration variable. Each is | |
269 | printed on a separate line in the form: | |
270 | ||
271 | name='value'; | |
272 | ||
273 | Names which are unknown are output as C<name='UNKNOWN';>. | |
274 | See also C<-V:name> in L<perlrun/Switches>. | |
275 | ||
276 | =back | |
277 | ||
278 | =head1 EXAMPLE | |
279 | ||
280 | Here's a more sophisticated example of using %Config: | |
281 | ||
282 | use Config; | |
743c51bc W |
283 | use strict; |
284 | ||
285 | my %sig_num; | |
286 | my @sig_name; | |
287 | unless($Config{sig_name} && $Config{sig_num}) { | |
288 | die "No sigs?"; | |
289 | } else { | |
290 | my @names = split ' ', $Config{sig_name}; | |
291 | @sig_num{@names} = split ' ', $Config{sig_num}; | |
292 | foreach (@names) { | |
293 | $sig_name[$sig_num{$_}] ||= $_; | |
294 | } | |
295 | } | |
3c81428c | 296 | |
743c51bc W |
297 | print "signal #17 = $sig_name[17]\n"; |
298 | if ($sig_num{ALRM}) { | |
299 | print "SIGALRM is $sig_num{ALRM}\n"; | |
3c81428c | 300 | } |
301 | ||
302 | =head1 WARNING | |
303 | ||
304 | Because this information is not stored within the perl executable | |
305 | itself it is possible (but unlikely) that the information does not | |
306 | relate to the actual perl binary which is being used to access it. | |
307 | ||
308 | The Config module is installed into the architecture and version | |
309 | specific library directory ($Config{installarchlib}) and it checks the | |
310 | perl version number when loaded. | |
311 | ||
435ec615 HM |
312 | The values stored in config.sh may be either single-quoted or |
313 | double-quoted. Double-quoted strings are handy for those cases where you | |
314 | need to include escape sequences in the strings. To avoid runtime variable | |
315 | interpolation, any C<$> and C<@> characters are replaced by C<\$> and | |
316 | C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$> | |
317 | or C<\@> in double-quoted strings unless you're willing to deal with the | |
318 | consequences. (The slashes will end up escaped and the C<$> or C<@> will | |
319 | trigger variable interpolation) | |
320 | ||
ebc74a4b GS |
321 | =head1 GLOSSARY |
322 | ||
323 | Most C<Config> variables are determined by the C<Configure> script | |
324 | on platforms supported by it (which is most UNIX platforms). Some | |
325 | platforms have custom-made C<Config> variables, and may thus not have | |
326 | some of the variables described below, or may have extraneous variables | |
327 | specific to that particular port. See the port specific documentation | |
328 | in such cases. | |
329 | ||
ebc74a4b GS |
330 | ENDOFTAIL |
331 | ||
332 | open(GLOS, "<$glossary") or die "Can't open $glossary: $!"; | |
fb87c415 IZ |
333 | %seen = (); |
334 | $text = 0; | |
335 | $/ = ''; | |
336 | ||
337 | sub process { | |
338 | s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m; | |
339 | my $c = substr $1, 0, 1; | |
340 | unless ($seen{$c}++) { | |
341 | print CONFIG <<EOF if $text; | |
342 | =back | |
ebc74a4b | 343 | |
fb87c415 IZ |
344 | EOF |
345 | print CONFIG <<EOF; | |
346 | =head2 $c | |
347 | ||
348 | =over | |
349 | ||
350 | EOF | |
351 | $text = 1; | |
352 | } | |
353 | s/n't/n\00t/g; # leave can't, won't etc untouched | |
354 | s/^\t\s+(.*)/\n\t$1\n/gm; # Indented lines ===> paragraphs | |
355 | s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text | |
356 | s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' | |
357 | s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command | |
358 | s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' | |
359 | s{ | |
360 | (?<! [\w./<\'\"] ) # Only standalone file names | |
361 | (?! e \. g \. ) # Not e.g. | |
362 | (?! \. \. \. ) # Not ... | |
363 | (?! \d ) # Not 5.004 | |
364 | ( [\w./]* [./] [\w./]* ) # Require . or / inside | |
365 | (?<! \. (?= \s ) ) # Do not include trailing dot | |
366 | (?! [\w/] ) # Include all of it | |
367 | } | |
368 | (F<$1>)xg; # /usr/local | |
369 | s/((?<=\s)~\w*)/F<$1>/g; # ~name | |
370 | s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD | |
371 | s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro | |
372 | s/n[\0]t/n't/g; # undo can't, won't damage | |
ebc74a4b GS |
373 | } |
374 | ||
fb87c415 IZ |
375 | <GLOS>; # Skip the preamble |
376 | while (<GLOS>) { | |
377 | process; | |
378 | print CONFIG; | |
379 | } | |
ebc74a4b GS |
380 | |
381 | print CONFIG <<'ENDOFTAIL'; | |
382 | ||
383 | =back | |
384 | ||
3c81428c | 385 | =head1 NOTE |
386 | ||
387 | This module contains a good example of how to use tie to implement a | |
388 | cache and an example of how to make a tied variable readonly to those | |
389 | outside of it. | |
390 | ||
391 | =cut | |
a0d0e21e | 392 | |
9193ea20 | 393 | ENDOFTAIL |
a0d0e21e LW |
394 | |
395 | close(CONFIG); | |
ebc74a4b | 396 | close(GLOS); |
a0d0e21e LW |
397 | |
398 | # Now do some simple tests on the Config.pm file we have created | |
399 | unshift(@INC,'lib'); | |
400 | require $config_pm; | |
401 | import Config; | |
402 | ||
403 | die "$0: $config_pm not valid" | |
404 | unless $Config{'CONFIG'} eq 'true'; | |
405 | ||
406 | die "$0: error processing $config_pm" | |
407 | if defined($Config{'an impossible name'}) | |
408 | or $Config{'CONFIG'} ne 'true' # test cache | |
409 | ; | |
410 | ||
411 | die "$0: error processing $config_pm" | |
412 | if eval '$Config{"cc"} = 1' | |
413 | or eval 'delete $Config{"cc"}' | |
414 | ; | |
415 | ||
416 | ||
85e6fe83 | 417 | exit 0; |