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