Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | #!./miniperl -w |
8990e307 | 2 | |
ebc74a4b | 3 | my $config_pm = $ARGV[0] || 'lib/Config.pm'; |
3b5ca523 | 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 | |
e3d0cac0 | 22 | print CONFIG <<'ENDOFBEG_NOQ', <<"ENDOFBEG"; |
8990e307 | 23 | package Config; |
3c81428c | 24 | use Exporter (); |
e3d0cac0 IZ |
25 | @EXPORT = qw(%Config); |
26 | @EXPORT_OK = qw(myconfig config_sh config_vars); | |
27 | ||
28 | # Define our own import method to avoid pulling in the full Exporter: | |
29 | sub import { | |
30 | my $pkg = shift; | |
31 | @_ = @EXPORT unless @_; | |
32 | my @func = grep {$_ ne '%Config'} @_; | |
4365a961 | 33 | local $Exporter::ExportLevel = 1; |
e3d0cac0 IZ |
34 | Exporter::import('Config', @func) if @func; |
35 | return if @func == @_; | |
36 | my $callpkg = caller(0); | |
37 | *{"$callpkg\::Config"} = \%Config; | |
38 | } | |
39 | ||
40 | ENDOFBEG_NOQ | |
a5f75d66 | 41 | \$] == $myver |
9193ea20 | 42 | or die "Perl lib version ($myver) doesn't match executable version (\$])"; |
8990e307 | 43 | |
a0d0e21e LW |
44 | # This file was created by configpm when Perl was built. Any changes |
45 | # made to this file will be lost the next time perl is built. | |
46 | ||
8990e307 LW |
47 | ENDOFBEG |
48 | ||
16d20bd9 | 49 | |
a0d0e21e | 50 | @fast{@fast} = @fast; |
fec02dd3 | 51 | @extensions{@extensions} = @extensions; |
a0d0e21e LW |
52 | @non_v=(); |
53 | @v_fast=(); | |
54 | @v_others=(); | |
44a8e56a | 55 | $in_v = 0; |
a0d0e21e | 56 | |
85e6fe83 | 57 | while (<>) { |
a0d0e21e | 58 | next if m:^#!/bin/sh:; |
2000072c | 59 | # Catch CONFIGDOTSH=true and PERL_VERSION=n line from Configure. |
a0d0e21e | 60 | s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/; |
cceca5ed | 61 | my ($k,$v) = ($1,$2); |
2000072c | 62 | # grandfather PATCHLEVEL and SUBVERSION and CONFIG |
cceca5ed GS |
63 | if ($k) { |
64 | if ($k eq 'PERL_VERSION') { | |
65 | push @v_others, "PATCHLEVEL='$v'\n"; | |
66 | } | |
67 | elsif ($k eq 'PERL_SUBVERSION') { | |
68 | push @v_others, "SUBVERSION='$v'\n"; | |
69 | } | |
2000072c JH |
70 | elsif ($k eq 'CONFIGDOTSH') { |
71 | push @v_others, "CONFIG='$v'\n"; | |
72 | } | |
cceca5ed | 73 | } |
435ec615 HM |
74 | # We can delimit things in config.sh with either ' or ". |
75 | unless ($in_v or m/^(\w+)=(['"])(.*\n)/){ | |
a0d0e21e LW |
76 | push(@non_v, "#$_"); # not a name='value' line |
77 | next; | |
78 | } | |
435ec615 | 79 | $quote = $2; |
44a8e56a | 80 | if ($in_v) { $val .= $_; } |
435ec615 HM |
81 | else { ($name,$val) = ($1,$3); } |
82 | $in_v = $val !~ /$quote\n/; | |
44a8e56a | 83 | next if $in_v; |
fec02dd3 | 84 | if ($extensions{$name}) { s,/,::,g } |
435ec615 HM |
85 | if (!$fast{$name}){ push(@v_others, "$name=$quote$val"); next; } |
86 | push(@v_fast,"$name=$quote$val"); | |
a0d0e21e LW |
87 | } |
88 | ||
89 | foreach(@non_v){ print CONFIG $_ } | |
90 | ||
91 | print CONFIG "\n", | |
3c81428c | 92 | "my \$config_sh = <<'!END!';\n", |
a0d0e21e | 93 | join("", @v_fast, sort @v_others), |
3c81428c | 94 | "!END!\n\n"; |
95 | ||
a6c40364 | 96 | # copy config summary format from the myconfig.SH script |
3c81428c | 97 | |
98 | print CONFIG "my \$summary = <<'!END!';\n"; | |
99 | ||
3b5ca523 | 100 | open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!"; |
54310121 | 101 | 1 while defined($_ = <MYCONFIG>) && !/^Summary of/; |
102 | do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/; | |
3c81428c | 103 | close(MYCONFIG); |
a0d0e21e | 104 | |
3c81428c | 105 | print CONFIG "\n!END!\n", <<'EOT'; |
106 | my $summary_expanded = 0; | |
107 | ||
108 | sub myconfig { | |
109 | return $summary if $summary_expanded; | |
ca8cad5c TB |
110 | $summary =~ s{\$(\w+)} |
111 | { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; | |
3c81428c | 112 | $summary_expanded = 1; |
113 | $summary; | |
114 | } | |
115 | EOT | |
116 | ||
117 | # ---- | |
a0d0e21e LW |
118 | |
119 | print CONFIG <<'ENDOFEND'; | |
120 | ||
a0d0e21e | 121 | sub FETCH { |
aa1bdcb8 | 122 | # check for cached value (which may be undef so we use exists not defined) |
a0d0e21e | 123 | return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]}); |
aa1bdcb8 TP |
124 | |
125 | # Search for it in the big string | |
435ec615 HM |
126 | my($value, $start, $marker, $quote_type); |
127 | $marker = "$_[1]="; | |
128 | $quote_type = "'"; | |
aa1bdcb8 | 129 | # return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); |
435ec615 HM |
130 | # Check for the common case, ' delimeted |
131 | $start = index($config_sh, "\n$marker$quote_type"); | |
132 | # If that failed, check for " delimited | |
133 | if ($start == -1) { | |
134 | $quote_type = '"'; | |
135 | $start = index($config_sh, "\n$marker$quote_type"); | |
136 | } | |
aa1bdcb8 TP |
137 | return undef if ( ($start == -1) && # in case it's first |
138 | (substr($config_sh, 0, length($marker)) ne $marker) ); | |
435ec615 HM |
139 | if ($start == -1) { |
140 | # It's the very first thing we found. Skip $start forward | |
141 | # and figure out the quote mark after the =. | |
142 | $start = length($marker) + 1; | |
143 | $quote_type = substr($config_sh, $start - 1, 1); | |
144 | } | |
145 | else { | |
146 | $start += length($marker) + 2; | |
147 | } | |
aa1bdcb8 | 148 | $value = substr($config_sh, $start, |
435ec615 | 149 | index($config_sh, "$quote_type\n", $start) - $start); |
a0d0e21e | 150 | |
435ec615 HM |
151 | # If we had a double-quote, we'd better eval it so escape |
152 | # sequences and such can be interpolated. Since the incoming | |
153 | # value is supposed to follow shell rules and not perl rules, | |
154 | # we escape any perl variable markers | |
155 | if ($quote_type eq '"') { | |
156 | $value =~ s/\$/\\\$/g; | |
157 | $value =~ s/\@/\\\@/g; | |
158 | eval "\$value = \"$value\""; | |
159 | } | |
160 | #$value = sprintf($value) if $quote_type eq '"'; | |
a0d0e21e LW |
161 | $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}". |
162 | $_[0]->{$_[1]} = $value; # cache it | |
163 | return $value; | |
164 | } | |
165 | ||
3c81428c | 166 | my $prevpos = 0; |
167 | ||
a0d0e21e LW |
168 | sub FIRSTKEY { |
169 | $prevpos = 0; | |
aa1bdcb8 TP |
170 | # my($key) = $config_sh =~ m/^(.*?)=/; |
171 | substr($config_sh, 0, index($config_sh, '=') ); | |
172 | # $key; | |
a0d0e21e LW |
173 | } |
174 | ||
175 | sub NEXTKEY { | |
435ec615 HM |
176 | # Find out how the current key's quoted so we can skip to its end. |
177 | my $quote = substr($config_sh, index($config_sh, "=", $prevpos)+1, 1); | |
178 | my $pos = index($config_sh, qq($quote\n), $prevpos) + 2; | |
3c81428c | 179 | my $len = index($config_sh, "=", $pos) - $pos; |
a0d0e21e | 180 | $prevpos = $pos; |
3c81428c | 181 | $len > 0 ? substr($config_sh, $pos, $len) : undef; |
85e6fe83 | 182 | } |
a0d0e21e | 183 | |
3c81428c | 184 | sub EXISTS { |
aa1bdcb8 TP |
185 | # exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; |
186 | exists($_[0]->{$_[1]}) or | |
187 | index($config_sh, "\n$_[1]='") != -1 or | |
435ec615 HM |
188 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]='" or |
189 | index($config_sh, "\n$_[1]=\"") != -1 or | |
190 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]=\""; | |
a0d0e21e LW |
191 | } |
192 | ||
3c81428c | 193 | sub STORE { die "\%Config::Config is read-only\n" } |
194 | sub DELETE { &STORE } | |
195 | sub CLEAR { &STORE } | |
a0d0e21e | 196 | |
3c81428c | 197 | |
198 | sub config_sh { | |
199 | $config_sh | |
748a9306 | 200 | } |
9193ea20 | 201 | |
202 | sub config_re { | |
203 | my $re = shift; | |
204 | my @matches = ($config_sh =~ /^$re=.*\n/mg); | |
205 | @matches ? (print @matches) : print "$re: not found\n"; | |
206 | } | |
207 | ||
3c81428c | 208 | sub config_vars { |
209 | foreach(@_){ | |
9193ea20 | 210 | config_re($_), next if /\W/; |
3c81428c | 211 | my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; |
212 | $v='undef' unless defined $v; | |
213 | print "$_='$v';\n"; | |
214 | } | |
215 | } | |
216 | ||
9193ea20 | 217 | ENDOFEND |
218 | ||
219 | if ($^O eq 'os2') { | |
220 | print CONFIG <<'ENDOFSET'; | |
221 | my %preconfig; | |
222 | if ($OS2::is_aout) { | |
223 | my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m; | |
224 | for (split ' ', $value) { | |
225 | ($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m; | |
226 | $preconfig{$_} = $v eq 'undef' ? undef : $v; | |
227 | } | |
228 | } | |
229 | sub TIEHASH { bless {%preconfig} } | |
230 | ENDOFSET | |
231 | } else { | |
232 | print CONFIG <<'ENDOFSET'; | |
233 | sub TIEHASH { bless {} } | |
234 | ENDOFSET | |
235 | } | |
236 | ||
237 | print CONFIG <<'ENDOFTAIL'; | |
238 | ||
fb73857a | 239 | # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD |
240 | sub DESTROY { } | |
241 | ||
9193ea20 | 242 | tie %Config, 'Config'; |
243 | ||
3c81428c | 244 | 1; |
245 | __END__ | |
748a9306 | 246 | |
3c81428c | 247 | =head1 NAME |
a0d0e21e | 248 | |
3c81428c | 249 | Config - access Perl configuration information |
250 | ||
251 | =head1 SYNOPSIS | |
252 | ||
253 | use Config; | |
254 | if ($Config{'cc'} =~ /gcc/) { | |
255 | print "built by gcc\n"; | |
256 | } | |
257 | ||
258 | use Config qw(myconfig config_sh config_vars); | |
259 | ||
260 | print myconfig(); | |
261 | ||
262 | print config_sh(); | |
263 | ||
264 | config_vars(qw(osname archname)); | |
265 | ||
266 | ||
267 | =head1 DESCRIPTION | |
268 | ||
269 | The Config module contains all the information that was available to | |
270 | the C<Configure> program at Perl build time (over 900 values). | |
271 | ||
272 | Shell variables from the F<config.sh> file (written by Configure) are | |
273 | stored in the readonly-variable C<%Config>, indexed by their names. | |
274 | ||
275 | Values stored in config.sh as 'undef' are returned as undefined | |
1fef88e7 | 276 | values. The perl C<exists> function can be used to check if a |
3c81428c | 277 | named variable exists. |
278 | ||
279 | =over 4 | |
280 | ||
281 | =item myconfig() | |
282 | ||
283 | Returns a textual summary of the major perl configuration values. | |
284 | See also C<-V> in L<perlrun/Switches>. | |
285 | ||
286 | =item config_sh() | |
287 | ||
288 | Returns the entire perl configuration information in the form of the | |
289 | original config.sh shell variable assignment script. | |
290 | ||
291 | =item config_vars(@names) | |
292 | ||
293 | Prints to STDOUT the values of the named configuration variable. Each is | |
294 | printed on a separate line in the form: | |
295 | ||
296 | name='value'; | |
297 | ||
298 | Names which are unknown are output as C<name='UNKNOWN';>. | |
299 | See also C<-V:name> in L<perlrun/Switches>. | |
300 | ||
301 | =back | |
302 | ||
303 | =head1 EXAMPLE | |
304 | ||
305 | Here's a more sophisticated example of using %Config: | |
306 | ||
307 | use Config; | |
743c51bc W |
308 | use strict; |
309 | ||
310 | my %sig_num; | |
311 | my @sig_name; | |
312 | unless($Config{sig_name} && $Config{sig_num}) { | |
313 | die "No sigs?"; | |
314 | } else { | |
315 | my @names = split ' ', $Config{sig_name}; | |
316 | @sig_num{@names} = split ' ', $Config{sig_num}; | |
317 | foreach (@names) { | |
318 | $sig_name[$sig_num{$_}] ||= $_; | |
319 | } | |
320 | } | |
3c81428c | 321 | |
743c51bc W |
322 | print "signal #17 = $sig_name[17]\n"; |
323 | if ($sig_num{ALRM}) { | |
324 | print "SIGALRM is $sig_num{ALRM}\n"; | |
3c81428c | 325 | } |
326 | ||
327 | =head1 WARNING | |
328 | ||
329 | Because this information is not stored within the perl executable | |
330 | itself it is possible (but unlikely) that the information does not | |
331 | relate to the actual perl binary which is being used to access it. | |
332 | ||
333 | The Config module is installed into the architecture and version | |
334 | specific library directory ($Config{installarchlib}) and it checks the | |
335 | perl version number when loaded. | |
336 | ||
435ec615 HM |
337 | The values stored in config.sh may be either single-quoted or |
338 | double-quoted. Double-quoted strings are handy for those cases where you | |
339 | need to include escape sequences in the strings. To avoid runtime variable | |
340 | interpolation, any C<$> and C<@> characters are replaced by C<\$> and | |
341 | C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$> | |
342 | or C<\@> in double-quoted strings unless you're willing to deal with the | |
343 | consequences. (The slashes will end up escaped and the C<$> or C<@> will | |
344 | trigger variable interpolation) | |
345 | ||
ebc74a4b GS |
346 | =head1 GLOSSARY |
347 | ||
348 | Most C<Config> variables are determined by the C<Configure> script | |
349 | on platforms supported by it (which is most UNIX platforms). Some | |
350 | platforms have custom-made C<Config> variables, and may thus not have | |
351 | some of the variables described below, or may have extraneous variables | |
352 | specific to that particular port. See the port specific documentation | |
353 | in such cases. | |
354 | ||
ebc74a4b GS |
355 | ENDOFTAIL |
356 | ||
357 | open(GLOS, "<$glossary") or die "Can't open $glossary: $!"; | |
fb87c415 IZ |
358 | %seen = (); |
359 | $text = 0; | |
360 | $/ = ''; | |
361 | ||
362 | sub process { | |
363 | s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m; | |
364 | my $c = substr $1, 0, 1; | |
365 | unless ($seen{$c}++) { | |
366 | print CONFIG <<EOF if $text; | |
367 | =back | |
ebc74a4b | 368 | |
fb87c415 IZ |
369 | EOF |
370 | print CONFIG <<EOF; | |
371 | =head2 $c | |
372 | ||
373 | =over | |
374 | ||
375 | EOF | |
376 | $text = 1; | |
377 | } | |
378 | s/n't/n\00t/g; # leave can't, won't etc untouched | |
379 | s/^\t\s+(.*)/\n\t$1\n/gm; # Indented lines ===> paragraphs | |
380 | s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text | |
381 | s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' | |
382 | s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command | |
383 | s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' | |
384 | s{ | |
385 | (?<! [\w./<\'\"] ) # Only standalone file names | |
386 | (?! e \. g \. ) # Not e.g. | |
387 | (?! \. \. \. ) # Not ... | |
388 | (?! \d ) # Not 5.004 | |
389 | ( [\w./]* [./] [\w./]* ) # Require . or / inside | |
390 | (?<! \. (?= \s ) ) # Do not include trailing dot | |
391 | (?! [\w/] ) # Include all of it | |
392 | } | |
393 | (F<$1>)xg; # /usr/local | |
394 | s/((?<=\s)~\w*)/F<$1>/g; # ~name | |
395 | s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD | |
396 | s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro | |
397 | s/n[\0]t/n't/g; # undo can't, won't damage | |
ebc74a4b GS |
398 | } |
399 | ||
fb87c415 IZ |
400 | <GLOS>; # Skip the preamble |
401 | while (<GLOS>) { | |
402 | process; | |
403 | print CONFIG; | |
404 | } | |
ebc74a4b GS |
405 | |
406 | print CONFIG <<'ENDOFTAIL'; | |
407 | ||
408 | =back | |
409 | ||
3c81428c | 410 | =head1 NOTE |
411 | ||
412 | This module contains a good example of how to use tie to implement a | |
413 | cache and an example of how to make a tied variable readonly to those | |
414 | outside of it. | |
415 | ||
416 | =cut | |
a0d0e21e | 417 | |
9193ea20 | 418 | ENDOFTAIL |
a0d0e21e LW |
419 | |
420 | close(CONFIG); | |
ebc74a4b | 421 | close(GLOS); |
a0d0e21e LW |
422 | |
423 | # Now do some simple tests on the Config.pm file we have created | |
424 | unshift(@INC,'lib'); | |
425 | require $config_pm; | |
426 | import Config; | |
427 | ||
428 | die "$0: $config_pm not valid" | |
2000072c | 429 | unless $Config{'CONFIGDOTSH'} eq 'true'; |
a0d0e21e LW |
430 | |
431 | die "$0: error processing $config_pm" | |
432 | if defined($Config{'an impossible name'}) | |
2000072c | 433 | or $Config{'CONFIGDOTSH'} ne 'true' # test cache |
a0d0e21e LW |
434 | ; |
435 | ||
436 | die "$0: error processing $config_pm" | |
437 | if eval '$Config{"cc"} = 1' | |
438 | or eval 'delete $Config{"cc"}' | |
439 | ; | |
440 | ||
441 | ||
85e6fe83 | 442 | exit 0; |