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"; | |
dd101d75 | 20 | $myver = sprintf "v%vd", $^V; |
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 | |
de98c553 GS |
41 | die "Perl lib version ($myver) doesn't match executable version (\$])" |
42 | unless \$^V; | |
43 | ||
dd101d75 JH |
44 | \$^V eq $myver |
45 | or die "Perl lib version ($myver) doesn't match executable version (" . | |
46 | (sprintf "v%vd",\$^V) . ")"; | |
8990e307 | 47 | |
a0d0e21e LW |
48 | # This file was created by configpm when Perl was built. Any changes |
49 | # made to this file will be lost the next time perl is built. | |
50 | ||
8990e307 LW |
51 | ENDOFBEG |
52 | ||
16d20bd9 | 53 | |
a0d0e21e | 54 | @fast{@fast} = @fast; |
fec02dd3 | 55 | @extensions{@extensions} = @extensions; |
a0d0e21e LW |
56 | @non_v=(); |
57 | @v_fast=(); | |
58 | @v_others=(); | |
44a8e56a | 59 | $in_v = 0; |
a0d0e21e | 60 | |
85e6fe83 | 61 | while (<>) { |
a0d0e21e | 62 | next if m:^#!/bin/sh:; |
2000072c | 63 | # Catch CONFIGDOTSH=true and PERL_VERSION=n line from Configure. |
a0d0e21e | 64 | s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/; |
cceca5ed | 65 | my ($k,$v) = ($1,$2); |
2000072c | 66 | # grandfather PATCHLEVEL and SUBVERSION and CONFIG |
cceca5ed GS |
67 | if ($k) { |
68 | if ($k eq 'PERL_VERSION') { | |
69 | push @v_others, "PATCHLEVEL='$v'\n"; | |
70 | } | |
71 | elsif ($k eq 'PERL_SUBVERSION') { | |
72 | push @v_others, "SUBVERSION='$v'\n"; | |
73 | } | |
2000072c JH |
74 | elsif ($k eq 'CONFIGDOTSH') { |
75 | push @v_others, "CONFIG='$v'\n"; | |
76 | } | |
cceca5ed | 77 | } |
435ec615 HM |
78 | # We can delimit things in config.sh with either ' or ". |
79 | unless ($in_v or m/^(\w+)=(['"])(.*\n)/){ | |
a0d0e21e LW |
80 | push(@non_v, "#$_"); # not a name='value' line |
81 | next; | |
82 | } | |
435ec615 | 83 | $quote = $2; |
44a8e56a | 84 | if ($in_v) { $val .= $_; } |
435ec615 HM |
85 | else { ($name,$val) = ($1,$3); } |
86 | $in_v = $val !~ /$quote\n/; | |
44a8e56a | 87 | next if $in_v; |
fec02dd3 | 88 | if ($extensions{$name}) { s,/,::,g } |
435ec615 HM |
89 | if (!$fast{$name}){ push(@v_others, "$name=$quote$val"); next; } |
90 | push(@v_fast,"$name=$quote$val"); | |
a0d0e21e LW |
91 | } |
92 | ||
93 | foreach(@non_v){ print CONFIG $_ } | |
94 | ||
95 | print CONFIG "\n", | |
3c81428c | 96 | "my \$config_sh = <<'!END!';\n", |
a0d0e21e | 97 | join("", @v_fast, sort @v_others), |
3c81428c | 98 | "!END!\n\n"; |
99 | ||
a6c40364 | 100 | # copy config summary format from the myconfig.SH script |
3c81428c | 101 | |
102 | print CONFIG "my \$summary = <<'!END!';\n"; | |
103 | ||
3b5ca523 | 104 | open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!"; |
54310121 | 105 | 1 while defined($_ = <MYCONFIG>) && !/^Summary of/; |
106 | do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/; | |
3c81428c | 107 | close(MYCONFIG); |
a0d0e21e | 108 | |
3c81428c | 109 | print CONFIG "\n!END!\n", <<'EOT'; |
110 | my $summary_expanded = 0; | |
111 | ||
112 | sub myconfig { | |
113 | return $summary if $summary_expanded; | |
ca8cad5c TB |
114 | $summary =~ s{\$(\w+)} |
115 | { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; | |
3c81428c | 116 | $summary_expanded = 1; |
117 | $summary; | |
118 | } | |
119 | EOT | |
120 | ||
121 | # ---- | |
a0d0e21e LW |
122 | |
123 | print CONFIG <<'ENDOFEND'; | |
124 | ||
a0d0e21e | 125 | sub FETCH { |
aa1bdcb8 | 126 | # check for cached value (which may be undef so we use exists not defined) |
a0d0e21e | 127 | return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]}); |
aa1bdcb8 TP |
128 | |
129 | # Search for it in the big string | |
435ec615 HM |
130 | my($value, $start, $marker, $quote_type); |
131 | $marker = "$_[1]="; | |
132 | $quote_type = "'"; | |
aa1bdcb8 | 133 | # return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); |
435ec615 HM |
134 | # Check for the common case, ' delimeted |
135 | $start = index($config_sh, "\n$marker$quote_type"); | |
136 | # If that failed, check for " delimited | |
137 | if ($start == -1) { | |
138 | $quote_type = '"'; | |
139 | $start = index($config_sh, "\n$marker$quote_type"); | |
140 | } | |
aa1bdcb8 TP |
141 | return undef if ( ($start == -1) && # in case it's first |
142 | (substr($config_sh, 0, length($marker)) ne $marker) ); | |
435ec615 HM |
143 | if ($start == -1) { |
144 | # It's the very first thing we found. Skip $start forward | |
145 | # and figure out the quote mark after the =. | |
146 | $start = length($marker) + 1; | |
147 | $quote_type = substr($config_sh, $start - 1, 1); | |
148 | } | |
149 | else { | |
150 | $start += length($marker) + 2; | |
151 | } | |
aa1bdcb8 | 152 | $value = substr($config_sh, $start, |
435ec615 | 153 | index($config_sh, "$quote_type\n", $start) - $start); |
a0d0e21e | 154 | |
435ec615 HM |
155 | # If we had a double-quote, we'd better eval it so escape |
156 | # sequences and such can be interpolated. Since the incoming | |
157 | # value is supposed to follow shell rules and not perl rules, | |
158 | # we escape any perl variable markers | |
159 | if ($quote_type eq '"') { | |
160 | $value =~ s/\$/\\\$/g; | |
161 | $value =~ s/\@/\\\@/g; | |
162 | eval "\$value = \"$value\""; | |
163 | } | |
164 | #$value = sprintf($value) if $quote_type eq '"'; | |
a0d0e21e LW |
165 | $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}". |
166 | $_[0]->{$_[1]} = $value; # cache it | |
167 | return $value; | |
168 | } | |
169 | ||
3c81428c | 170 | my $prevpos = 0; |
171 | ||
a0d0e21e LW |
172 | sub FIRSTKEY { |
173 | $prevpos = 0; | |
aa1bdcb8 TP |
174 | # my($key) = $config_sh =~ m/^(.*?)=/; |
175 | substr($config_sh, 0, index($config_sh, '=') ); | |
176 | # $key; | |
a0d0e21e LW |
177 | } |
178 | ||
179 | sub NEXTKEY { | |
435ec615 HM |
180 | # Find out how the current key's quoted so we can skip to its end. |
181 | my $quote = substr($config_sh, index($config_sh, "=", $prevpos)+1, 1); | |
182 | my $pos = index($config_sh, qq($quote\n), $prevpos) + 2; | |
3c81428c | 183 | my $len = index($config_sh, "=", $pos) - $pos; |
a0d0e21e | 184 | $prevpos = $pos; |
3c81428c | 185 | $len > 0 ? substr($config_sh, $pos, $len) : undef; |
85e6fe83 | 186 | } |
a0d0e21e | 187 | |
3c81428c | 188 | sub EXISTS { |
aa1bdcb8 TP |
189 | # exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; |
190 | exists($_[0]->{$_[1]}) or | |
191 | index($config_sh, "\n$_[1]='") != -1 or | |
435ec615 HM |
192 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]='" or |
193 | index($config_sh, "\n$_[1]=\"") != -1 or | |
194 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]=\""; | |
a0d0e21e LW |
195 | } |
196 | ||
3c81428c | 197 | sub STORE { die "\%Config::Config is read-only\n" } |
198 | sub DELETE { &STORE } | |
199 | sub CLEAR { &STORE } | |
a0d0e21e | 200 | |
3c81428c | 201 | |
202 | sub config_sh { | |
203 | $config_sh | |
748a9306 | 204 | } |
9193ea20 | 205 | |
206 | sub config_re { | |
207 | my $re = shift; | |
208 | my @matches = ($config_sh =~ /^$re=.*\n/mg); | |
209 | @matches ? (print @matches) : print "$re: not found\n"; | |
210 | } | |
211 | ||
3c81428c | 212 | sub config_vars { |
213 | foreach(@_){ | |
9193ea20 | 214 | config_re($_), next if /\W/; |
3c81428c | 215 | my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; |
216 | $v='undef' unless defined $v; | |
217 | print "$_='$v';\n"; | |
218 | } | |
219 | } | |
220 | ||
9193ea20 | 221 | ENDOFEND |
222 | ||
223 | if ($^O eq 'os2') { | |
224 | print CONFIG <<'ENDOFSET'; | |
225 | my %preconfig; | |
226 | if ($OS2::is_aout) { | |
227 | my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m; | |
228 | for (split ' ', $value) { | |
229 | ($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m; | |
230 | $preconfig{$_} = $v eq 'undef' ? undef : $v; | |
231 | } | |
232 | } | |
233 | sub TIEHASH { bless {%preconfig} } | |
234 | ENDOFSET | |
235 | } else { | |
236 | print CONFIG <<'ENDOFSET'; | |
237 | sub TIEHASH { bless {} } | |
238 | ENDOFSET | |
239 | } | |
240 | ||
241 | print CONFIG <<'ENDOFTAIL'; | |
242 | ||
fb73857a | 243 | # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD |
244 | sub DESTROY { } | |
245 | ||
9193ea20 | 246 | tie %Config, 'Config'; |
247 | ||
3c81428c | 248 | 1; |
249 | __END__ | |
748a9306 | 250 | |
3c81428c | 251 | =head1 NAME |
a0d0e21e | 252 | |
3c81428c | 253 | Config - access Perl configuration information |
254 | ||
255 | =head1 SYNOPSIS | |
256 | ||
257 | use Config; | |
258 | if ($Config{'cc'} =~ /gcc/) { | |
259 | print "built by gcc\n"; | |
260 | } | |
261 | ||
262 | use Config qw(myconfig config_sh config_vars); | |
263 | ||
264 | print myconfig(); | |
265 | ||
266 | print config_sh(); | |
267 | ||
268 | config_vars(qw(osname archname)); | |
269 | ||
270 | ||
271 | =head1 DESCRIPTION | |
272 | ||
273 | The Config module contains all the information that was available to | |
274 | the C<Configure> program at Perl build time (over 900 values). | |
275 | ||
276 | Shell variables from the F<config.sh> file (written by Configure) are | |
277 | stored in the readonly-variable C<%Config>, indexed by their names. | |
278 | ||
279 | Values stored in config.sh as 'undef' are returned as undefined | |
1fef88e7 | 280 | values. The perl C<exists> function can be used to check if a |
3c81428c | 281 | named variable exists. |
282 | ||
283 | =over 4 | |
284 | ||
285 | =item myconfig() | |
286 | ||
287 | Returns a textual summary of the major perl configuration values. | |
288 | See also C<-V> in L<perlrun/Switches>. | |
289 | ||
290 | =item config_sh() | |
291 | ||
292 | Returns the entire perl configuration information in the form of the | |
293 | original config.sh shell variable assignment script. | |
294 | ||
295 | =item config_vars(@names) | |
296 | ||
297 | Prints to STDOUT the values of the named configuration variable. Each is | |
298 | printed on a separate line in the form: | |
299 | ||
300 | name='value'; | |
301 | ||
302 | Names which are unknown are output as C<name='UNKNOWN';>. | |
303 | See also C<-V:name> in L<perlrun/Switches>. | |
304 | ||
305 | =back | |
306 | ||
307 | =head1 EXAMPLE | |
308 | ||
309 | Here's a more sophisticated example of using %Config: | |
310 | ||
311 | use Config; | |
743c51bc W |
312 | use strict; |
313 | ||
314 | my %sig_num; | |
315 | my @sig_name; | |
316 | unless($Config{sig_name} && $Config{sig_num}) { | |
317 | die "No sigs?"; | |
318 | } else { | |
319 | my @names = split ' ', $Config{sig_name}; | |
320 | @sig_num{@names} = split ' ', $Config{sig_num}; | |
321 | foreach (@names) { | |
322 | $sig_name[$sig_num{$_}] ||= $_; | |
323 | } | |
324 | } | |
3c81428c | 325 | |
743c51bc W |
326 | print "signal #17 = $sig_name[17]\n"; |
327 | if ($sig_num{ALRM}) { | |
328 | print "SIGALRM is $sig_num{ALRM}\n"; | |
3c81428c | 329 | } |
330 | ||
331 | =head1 WARNING | |
332 | ||
333 | Because this information is not stored within the perl executable | |
334 | itself it is possible (but unlikely) that the information does not | |
335 | relate to the actual perl binary which is being used to access it. | |
336 | ||
337 | The Config module is installed into the architecture and version | |
338 | specific library directory ($Config{installarchlib}) and it checks the | |
339 | perl version number when loaded. | |
340 | ||
435ec615 HM |
341 | The values stored in config.sh may be either single-quoted or |
342 | double-quoted. Double-quoted strings are handy for those cases where you | |
343 | need to include escape sequences in the strings. To avoid runtime variable | |
344 | interpolation, any C<$> and C<@> characters are replaced by C<\$> and | |
345 | C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$> | |
346 | or C<\@> in double-quoted strings unless you're willing to deal with the | |
347 | consequences. (The slashes will end up escaped and the C<$> or C<@> will | |
348 | trigger variable interpolation) | |
349 | ||
ebc74a4b GS |
350 | =head1 GLOSSARY |
351 | ||
352 | Most C<Config> variables are determined by the C<Configure> script | |
353 | on platforms supported by it (which is most UNIX platforms). Some | |
354 | platforms have custom-made C<Config> variables, and may thus not have | |
355 | some of the variables described below, or may have extraneous variables | |
356 | specific to that particular port. See the port specific documentation | |
357 | in such cases. | |
358 | ||
ebc74a4b GS |
359 | ENDOFTAIL |
360 | ||
361 | open(GLOS, "<$glossary") or die "Can't open $glossary: $!"; | |
fb87c415 IZ |
362 | %seen = (); |
363 | $text = 0; | |
364 | $/ = ''; | |
365 | ||
366 | sub process { | |
367 | s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m; | |
368 | my $c = substr $1, 0, 1; | |
369 | unless ($seen{$c}++) { | |
370 | print CONFIG <<EOF if $text; | |
371 | =back | |
ebc74a4b | 372 | |
fb87c415 IZ |
373 | EOF |
374 | print CONFIG <<EOF; | |
375 | =head2 $c | |
376 | ||
377 | =over | |
378 | ||
379 | EOF | |
380 | $text = 1; | |
381 | } | |
382 | s/n't/n\00t/g; # leave can't, won't etc untouched | |
383 | s/^\t\s+(.*)/\n\t$1\n/gm; # Indented lines ===> paragraphs | |
384 | s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text | |
385 | s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' | |
386 | s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command | |
387 | s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' | |
388 | s{ | |
389 | (?<! [\w./<\'\"] ) # Only standalone file names | |
390 | (?! e \. g \. ) # Not e.g. | |
391 | (?! \. \. \. ) # Not ... | |
392 | (?! \d ) # Not 5.004 | |
393 | ( [\w./]* [./] [\w./]* ) # Require . or / inside | |
394 | (?<! \. (?= \s ) ) # Do not include trailing dot | |
395 | (?! [\w/] ) # Include all of it | |
396 | } | |
397 | (F<$1>)xg; # /usr/local | |
398 | s/((?<=\s)~\w*)/F<$1>/g; # ~name | |
399 | s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD | |
400 | s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro | |
401 | s/n[\0]t/n't/g; # undo can't, won't damage | |
ebc74a4b GS |
402 | } |
403 | ||
fb87c415 IZ |
404 | <GLOS>; # Skip the preamble |
405 | while (<GLOS>) { | |
406 | process; | |
407 | print CONFIG; | |
408 | } | |
ebc74a4b GS |
409 | |
410 | print CONFIG <<'ENDOFTAIL'; | |
411 | ||
412 | =back | |
413 | ||
3c81428c | 414 | =head1 NOTE |
415 | ||
416 | This module contains a good example of how to use tie to implement a | |
417 | cache and an example of how to make a tied variable readonly to those | |
418 | outside of it. | |
419 | ||
420 | =cut | |
a0d0e21e | 421 | |
9193ea20 | 422 | ENDOFTAIL |
a0d0e21e LW |
423 | |
424 | close(CONFIG); | |
ebc74a4b | 425 | close(GLOS); |
a0d0e21e LW |
426 | |
427 | # Now do some simple tests on the Config.pm file we have created | |
428 | unshift(@INC,'lib'); | |
429 | require $config_pm; | |
430 | import Config; | |
431 | ||
432 | die "$0: $config_pm not valid" | |
2000072c | 433 | unless $Config{'CONFIGDOTSH'} eq 'true'; |
a0d0e21e LW |
434 | |
435 | die "$0: error processing $config_pm" | |
436 | if defined($Config{'an impossible name'}) | |
2000072c | 437 | or $Config{'CONFIGDOTSH'} ne 'true' # test cache |
a0d0e21e LW |
438 | ; |
439 | ||
440 | die "$0: error processing $config_pm" | |
441 | if eval '$Config{"cc"} = 1' | |
442 | or eval 'delete $Config{"cc"}' | |
443 | ; | |
444 | ||
445 | ||
85e6fe83 | 446 | exit 0; |