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