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 | $in_v = 0; |
a0d0e21e | 60 | |
85e6fe83 | 61 | while (<>) { |
a0d0e21e | 62 | next if m:^#!/bin/sh:; |
a02608de | 63 | # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure. |
a0d0e21e | 64 | s/^(\w+)=(true|\d+)\s*$/$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 | } | |
a02608de | 74 | elsif ($k eq 'PERL_CONFIG_SH') { |
2000072c JH |
75 | push @v_others, "CONFIG='$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 | 130 | my($value, $start, $marker, $quote_type); |
46f36567 | 131 | |
435ec615 | 132 | $quote_type = "'"; |
4b2ec495 | 133 | # Virtual entries. |
46f36567 | 134 | if ($_[1] eq 'byteorder') { |
4b2ec495 JH |
135 | # byteorder does exist on its own but we overlay a virtual |
136 | # dynamically recomputed value. | |
46f36567 W |
137 | my $t = $Config{ivtype}; |
138 | my $s = $Config{ivsize}; | |
139 | my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I'; | |
46f36567 | 140 | if ($s == 4 || $s == 8) { |
ad66e0eb JH |
141 | my $i = 0; |
142 | foreach my $c (reverse(2..$s)) { $i |= ord($c); $i <<= 8 } | |
143 | $i |= ord(1); | |
46f36567 W |
144 | $value = join('', unpack('a'x$s, pack($f, $i))); |
145 | } else { | |
146 | $value = '?'x$s; | |
147 | } | |
4b2ec495 JH |
148 | } elsif ($_[1] =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) { |
149 | # These are purely virtual, they do not exist, but need to | |
150 | # be computed on demand for largefile-incapable extensions. | |
45c9e83b | 151 | my $key = "${1}_uselargefiles"; |
4b2ec495 JH |
152 | $value = $Config{$1}; |
153 | my $withlargefiles = $Config{$key}; | |
154 | if ($key =~ /^(?:cc|ld)flags_/) { | |
155 | $value =~ s/\Q$withlargefiles\E\b//; | |
156 | } elsif ($key =~ /^libs/) { | |
45c9e83b | 157 | my @lflibswanted = split(' ', $Config{libswanted_uselargefiles}); |
4b2ec495 JH |
158 | if (@lflibswanted) { |
159 | my %lflibswanted; | |
160 | @lflibswanted{@lflibswanted} = (); | |
161 | if ($key =~ /^libs_/) { | |
162 | my @libs = grep { /^-l(.+)/ && | |
163 | not exists $lflibswanted{$1} } | |
164 | split(' ', $Config{libs}); | |
165 | $Config{libs} = join(' ', @libs); | |
166 | } elsif ($key =~ /^libswanted_/) { | |
167 | my @libswanted = grep { not exists $lflibswanted{$_} } | |
168 | split(' ', $Config{libswanted}); | |
169 | $Config{libswanted} = join(' ', @libswanted); | |
170 | } | |
171 | } | |
172 | } | |
46f36567 W |
173 | } else { |
174 | $marker = "$_[1]="; | |
175 | # return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); | |
176 | # Check for the common case, ' delimeted | |
177 | $start = index($config_sh, "\n$marker$quote_type"); | |
178 | # If that failed, check for " delimited | |
179 | if ($start == -1) { | |
180 | $quote_type = '"'; | |
181 | $start = index($config_sh, "\n$marker$quote_type"); | |
182 | } | |
183 | return undef if ( ($start == -1) && # in case it's first | |
184 | (substr($config_sh, 0, length($marker)) ne $marker) ); | |
185 | if ($start == -1) { | |
186 | # It's the very first thing we found. Skip $start forward | |
187 | # and figure out the quote mark after the =. | |
188 | $start = length($marker) + 1; | |
189 | $quote_type = substr($config_sh, $start - 1, 1); | |
190 | } | |
191 | else { | |
192 | $start += length($marker) + 2; | |
193 | } | |
194 | $value = substr($config_sh, $start, | |
195 | index($config_sh, "$quote_type\n", $start) - $start); | |
435ec615 | 196 | } |
435ec615 HM |
197 | # If we had a double-quote, we'd better eval it so escape |
198 | # sequences and such can be interpolated. Since the incoming | |
199 | # value is supposed to follow shell rules and not perl rules, | |
200 | # we escape any perl variable markers | |
201 | if ($quote_type eq '"') { | |
46f36567 W |
202 | $value =~ s/\$/\\\$/g; |
203 | $value =~ s/\@/\\\@/g; | |
204 | eval "\$value = \"$value\""; | |
435ec615 HM |
205 | } |
206 | #$value = sprintf($value) if $quote_type eq '"'; | |
46f36567 W |
207 | # So we can say "if $Config{'foo'}". |
208 | $value = undef if $value eq 'undef'; | |
a0d0e21e LW |
209 | $_[0]->{$_[1]} = $value; # cache it |
210 | return $value; | |
211 | } | |
212 | ||
3c81428c | 213 | my $prevpos = 0; |
214 | ||
a0d0e21e LW |
215 | sub FIRSTKEY { |
216 | $prevpos = 0; | |
aa1bdcb8 TP |
217 | # my($key) = $config_sh =~ m/^(.*?)=/; |
218 | substr($config_sh, 0, index($config_sh, '=') ); | |
219 | # $key; | |
a0d0e21e LW |
220 | } |
221 | ||
222 | sub NEXTKEY { | |
435ec615 HM |
223 | # Find out how the current key's quoted so we can skip to its end. |
224 | my $quote = substr($config_sh, index($config_sh, "=", $prevpos)+1, 1); | |
225 | my $pos = index($config_sh, qq($quote\n), $prevpos) + 2; | |
3c81428c | 226 | my $len = index($config_sh, "=", $pos) - $pos; |
a0d0e21e | 227 | $prevpos = $pos; |
3c81428c | 228 | $len > 0 ? substr($config_sh, $pos, $len) : undef; |
85e6fe83 | 229 | } |
a0d0e21e | 230 | |
3c81428c | 231 | sub EXISTS { |
aa1bdcb8 TP |
232 | # exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; |
233 | exists($_[0]->{$_[1]}) or | |
234 | index($config_sh, "\n$_[1]='") != -1 or | |
435ec615 HM |
235 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]='" or |
236 | index($config_sh, "\n$_[1]=\"") != -1 or | |
4b2ec495 JH |
237 | substr($config_sh, 0, length($_[1])+2) eq "$_[1]=\"" or |
238 | $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/; | |
a0d0e21e LW |
239 | } |
240 | ||
3c81428c | 241 | sub STORE { die "\%Config::Config is read-only\n" } |
242 | sub DELETE { &STORE } | |
243 | sub CLEAR { &STORE } | |
a0d0e21e | 244 | |
3c81428c | 245 | |
246 | sub config_sh { | |
247 | $config_sh | |
748a9306 | 248 | } |
9193ea20 | 249 | |
250 | sub config_re { | |
251 | my $re = shift; | |
252 | my @matches = ($config_sh =~ /^$re=.*\n/mg); | |
253 | @matches ? (print @matches) : print "$re: not found\n"; | |
254 | } | |
255 | ||
3c81428c | 256 | sub config_vars { |
257 | foreach(@_){ | |
9193ea20 | 258 | config_re($_), next if /\W/; |
3c81428c | 259 | my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; |
260 | $v='undef' unless defined $v; | |
261 | print "$_='$v';\n"; | |
262 | } | |
263 | } | |
264 | ||
9193ea20 | 265 | ENDOFEND |
266 | ||
267 | if ($^O eq 'os2') { | |
268 | print CONFIG <<'ENDOFSET'; | |
269 | my %preconfig; | |
270 | if ($OS2::is_aout) { | |
271 | my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m; | |
272 | for (split ' ', $value) { | |
273 | ($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m; | |
274 | $preconfig{$_} = $v eq 'undef' ? undef : $v; | |
275 | } | |
276 | } | |
277 | sub TIEHASH { bless {%preconfig} } | |
278 | ENDOFSET | |
279 | } else { | |
280 | print CONFIG <<'ENDOFSET'; | |
281 | sub TIEHASH { bless {} } | |
282 | ENDOFSET | |
283 | } | |
284 | ||
285 | print CONFIG <<'ENDOFTAIL'; | |
286 | ||
fb73857a | 287 | # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD |
288 | sub DESTROY { } | |
289 | ||
9193ea20 | 290 | tie %Config, 'Config'; |
291 | ||
3c81428c | 292 | 1; |
293 | __END__ | |
748a9306 | 294 | |
3c81428c | 295 | =head1 NAME |
a0d0e21e | 296 | |
3c81428c | 297 | Config - access Perl configuration information |
298 | ||
299 | =head1 SYNOPSIS | |
300 | ||
301 | use Config; | |
302 | if ($Config{'cc'} =~ /gcc/) { | |
303 | print "built by gcc\n"; | |
304 | } | |
305 | ||
306 | use Config qw(myconfig config_sh config_vars); | |
307 | ||
308 | print myconfig(); | |
309 | ||
310 | print config_sh(); | |
311 | ||
312 | config_vars(qw(osname archname)); | |
313 | ||
314 | ||
315 | =head1 DESCRIPTION | |
316 | ||
317 | The Config module contains all the information that was available to | |
318 | the C<Configure> program at Perl build time (over 900 values). | |
319 | ||
320 | Shell variables from the F<config.sh> file (written by Configure) are | |
321 | stored in the readonly-variable C<%Config>, indexed by their names. | |
322 | ||
323 | Values stored in config.sh as 'undef' are returned as undefined | |
1fef88e7 | 324 | values. The perl C<exists> function can be used to check if a |
3c81428c | 325 | named variable exists. |
326 | ||
327 | =over 4 | |
328 | ||
329 | =item myconfig() | |
330 | ||
331 | Returns a textual summary of the major perl configuration values. | |
332 | See also C<-V> in L<perlrun/Switches>. | |
333 | ||
334 | =item config_sh() | |
335 | ||
336 | Returns the entire perl configuration information in the form of the | |
337 | original config.sh shell variable assignment script. | |
338 | ||
339 | =item config_vars(@names) | |
340 | ||
341 | Prints to STDOUT the values of the named configuration variable. Each is | |
342 | printed on a separate line in the form: | |
343 | ||
344 | name='value'; | |
345 | ||
346 | Names which are unknown are output as C<name='UNKNOWN';>. | |
347 | See also C<-V:name> in L<perlrun/Switches>. | |
348 | ||
349 | =back | |
350 | ||
351 | =head1 EXAMPLE | |
352 | ||
353 | Here's a more sophisticated example of using %Config: | |
354 | ||
355 | use Config; | |
743c51bc W |
356 | use strict; |
357 | ||
358 | my %sig_num; | |
359 | my @sig_name; | |
360 | unless($Config{sig_name} && $Config{sig_num}) { | |
361 | die "No sigs?"; | |
362 | } else { | |
363 | my @names = split ' ', $Config{sig_name}; | |
364 | @sig_num{@names} = split ' ', $Config{sig_num}; | |
365 | foreach (@names) { | |
366 | $sig_name[$sig_num{$_}] ||= $_; | |
367 | } | |
368 | } | |
3c81428c | 369 | |
743c51bc W |
370 | print "signal #17 = $sig_name[17]\n"; |
371 | if ($sig_num{ALRM}) { | |
372 | print "SIGALRM is $sig_num{ALRM}\n"; | |
3c81428c | 373 | } |
374 | ||
375 | =head1 WARNING | |
376 | ||
377 | Because this information is not stored within the perl executable | |
378 | itself it is possible (but unlikely) that the information does not | |
379 | relate to the actual perl binary which is being used to access it. | |
380 | ||
381 | The Config module is installed into the architecture and version | |
382 | specific library directory ($Config{installarchlib}) and it checks the | |
383 | perl version number when loaded. | |
384 | ||
435ec615 HM |
385 | The values stored in config.sh may be either single-quoted or |
386 | double-quoted. Double-quoted strings are handy for those cases where you | |
387 | need to include escape sequences in the strings. To avoid runtime variable | |
388 | interpolation, any C<$> and C<@> characters are replaced by C<\$> and | |
389 | C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$> | |
390 | or C<\@> in double-quoted strings unless you're willing to deal with the | |
391 | consequences. (The slashes will end up escaped and the C<$> or C<@> will | |
392 | trigger variable interpolation) | |
393 | ||
ebc74a4b GS |
394 | =head1 GLOSSARY |
395 | ||
396 | Most C<Config> variables are determined by the C<Configure> script | |
397 | on platforms supported by it (which is most UNIX platforms). Some | |
398 | platforms have custom-made C<Config> variables, and may thus not have | |
399 | some of the variables described below, or may have extraneous variables | |
400 | specific to that particular port. See the port specific documentation | |
401 | in such cases. | |
402 | ||
ebc74a4b GS |
403 | ENDOFTAIL |
404 | ||
405 | open(GLOS, "<$glossary") or die "Can't open $glossary: $!"; | |
fb87c415 IZ |
406 | %seen = (); |
407 | $text = 0; | |
408 | $/ = ''; | |
409 | ||
410 | sub process { | |
411 | s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m; | |
412 | my $c = substr $1, 0, 1; | |
413 | unless ($seen{$c}++) { | |
414 | print CONFIG <<EOF if $text; | |
415 | =back | |
ebc74a4b | 416 | |
fb87c415 IZ |
417 | EOF |
418 | print CONFIG <<EOF; | |
419 | =head2 $c | |
420 | ||
bbc7dcd2 | 421 | =over 4 |
fb87c415 IZ |
422 | |
423 | EOF | |
424 | $text = 1; | |
425 | } | |
426 | s/n't/n\00t/g; # leave can't, won't etc untouched | |
427 | s/^\t\s+(.*)/\n\t$1\n/gm; # Indented lines ===> paragraphs | |
428 | s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text | |
429 | s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' | |
430 | s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command | |
431 | s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' | |
432 | s{ | |
433 | (?<! [\w./<\'\"] ) # Only standalone file names | |
434 | (?! e \. g \. ) # Not e.g. | |
435 | (?! \. \. \. ) # Not ... | |
436 | (?! \d ) # Not 5.004 | |
437 | ( [\w./]* [./] [\w./]* ) # Require . or / inside | |
438 | (?<! \. (?= \s ) ) # Do not include trailing dot | |
439 | (?! [\w/] ) # Include all of it | |
440 | } | |
441 | (F<$1>)xg; # /usr/local | |
442 | s/((?<=\s)~\w*)/F<$1>/g; # ~name | |
443 | s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD | |
444 | s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro | |
445 | s/n[\0]t/n't/g; # undo can't, won't damage | |
ebc74a4b GS |
446 | } |
447 | ||
fb87c415 IZ |
448 | <GLOS>; # Skip the preamble |
449 | while (<GLOS>) { | |
450 | process; | |
451 | print CONFIG; | |
452 | } | |
ebc74a4b GS |
453 | |
454 | print CONFIG <<'ENDOFTAIL'; | |
455 | ||
456 | =back | |
457 | ||
3c81428c | 458 | =head1 NOTE |
459 | ||
460 | This module contains a good example of how to use tie to implement a | |
461 | cache and an example of how to make a tied variable readonly to those | |
462 | outside of it. | |
463 | ||
464 | =cut | |
a0d0e21e | 465 | |
9193ea20 | 466 | ENDOFTAIL |
a0d0e21e LW |
467 | |
468 | close(CONFIG); | |
ebc74a4b | 469 | close(GLOS); |
a0d0e21e LW |
470 | |
471 | # Now do some simple tests on the Config.pm file we have created | |
472 | unshift(@INC,'lib'); | |
473 | require $config_pm; | |
474 | import Config; | |
475 | ||
476 | die "$0: $config_pm not valid" | |
a02608de | 477 | unless $Config{'PERL_CONFIG_SH'} eq 'true'; |
a0d0e21e LW |
478 | |
479 | die "$0: error processing $config_pm" | |
480 | if defined($Config{'an impossible name'}) | |
a02608de | 481 | or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache |
a0d0e21e LW |
482 | ; |
483 | ||
484 | die "$0: error processing $config_pm" | |
485 | if eval '$Config{"cc"} = 1' | |
486 | or eval 'delete $Config{"cc"}' | |
487 | ; | |
488 | ||
489 | ||
85e6fe83 | 490 | exit 0; |