Commit | Line | Data |
a0d0e21e |
1 | #!./miniperl -w |
2f4f46ad |
2 | use strict; |
3 | use vars qw(%Config $Config_SH_expanded); |
8990e307 |
4 | |
5435c704 |
5 | # commonly used names to put first (and hence lookup fastest) |
6 | my %Common = map {($_,$_)} |
7 | qw(archname osname osvers prefix libs libpth |
8 | dynamic_ext static_ext dlsrc so |
9 | cc ccflags cppflags |
10 | privlibexp archlibexp installprivlib installarchlib |
11 | sharpbang startsh shsharp |
12 | ); |
13 | |
14 | # names of things which may need to have slashes changed to double-colons |
15 | my %Extensions = map {($_,$_)} |
16 | qw(dynamic_ext static_ext extensions known_extensions); |
17 | |
18 | # allowed opts as well as specifies default and initial values |
19 | my %Allowed_Opts = ( |
2d9d8159 |
20 | 'cross' => '', # --cross=PLATFORM - crosscompiling for PLATFORM |
21 | 'glossary' => 1, # --no-glossary - no glossary file inclusion, |
5435c704 |
22 | # for compactness |
2d9d8159 |
23 | 'heavy' => '', # pathname of the Config_heavy.pl file |
18f68570 |
24 | ); |
18f68570 |
25 | |
5435c704 |
26 | sub opts { |
27 | # user specified options |
28 | my %given_opts = ( |
29 | # --opt=smth |
30 | (map {/^--([\-_\w]+)=(.*)$/} @ARGV), |
31 | # --opt --no-opt --noopt |
32 | (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV), |
33 | ); |
34 | |
35 | my %opts = (%Allowed_Opts, %given_opts); |
36 | |
37 | for my $opt (grep {!exists $Allowed_Opts{$_}} keys %given_opts) { |
38 | die "option '$opt' is not recognized"; |
39 | } |
40 | @ARGV = grep {!/^--/} @ARGV; |
41 | |
42 | return %opts; |
43 | } |
18f68570 |
44 | |
5435c704 |
45 | |
46 | my %Opts = opts(); |
47 | |
2d9d8159 |
48 | my ($Config_PM, $Config_heavy); |
5435c704 |
49 | my $Glossary = $ARGV[1] || 'Porting/Glossary'; |
50 | |
51 | if ($Opts{cross}) { |
18f68570 |
52 | # creating cross-platform config file |
53 | mkdir "xlib"; |
5435c704 |
54 | mkdir "xlib/$Opts{cross}"; |
55 | $Config_PM = $ARGV[0] || "xlib/$Opts{cross}/Config.pm"; |
18f68570 |
56 | } |
57 | else { |
5435c704 |
58 | $Config_PM = $ARGV[0] || 'lib/Config.pm'; |
18f68570 |
59 | } |
2d9d8159 |
60 | if ($Opts{heavy}) { |
61 | $Config_heavy = $Opts{heavy}; |
62 | } |
63 | else { |
64 | ($Config_heavy = $Config_PM) =~ s!\.pm$!_heavy.pl!; |
65 | die "Can't automatically determine name for Config_heavy.pl from '$Config_PM'" |
66 | if $Config_heavy eq $Config_PM; |
67 | } |
8990e307 |
68 | |
5435c704 |
69 | open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n"; |
2d9d8159 |
70 | open CONFIG_HEAVY, ">$Config_heavy" or die "Can't open $Config_heavy: $!\n"; |
71 | |
72 | print CONFIG_HEAVY <<'ENDOFBEG'; |
73 | # This file was created by configpm when Perl was built. Any changes |
74 | # made to this file will be lost the next time perl is built. |
75 | |
76 | package Config; |
77 | use strict; |
78 | # use warnings; Pulls in Carp |
79 | # use vars pulls in Carp |
80 | ENDOFBEG |
fec02dd3 |
81 | |
5435c704 |
82 | my $myver = sprintf "v%vd", $^V; |
a0d0e21e |
83 | |
5435c704 |
84 | printf CONFIG <<'ENDOFBEG', ($myver) x 3; |
85 | # This file was created by configpm when Perl was built. Any changes |
86 | # made to this file will be lost the next time perl is built. |
3c81428c |
87 | |
8990e307 |
88 | package Config; |
2f4f46ad |
89 | use strict; |
90 | # use warnings; Pulls in Carp |
91 | # use vars pulls in Carp |
92 | @Config::EXPORT = qw(%%Config); |
93 | @Config::EXPORT_OK = qw(myconfig config_sh config_vars config_re); |
a48f8c77 |
94 | |
2f4f46ad |
95 | my %%Export_Cache = map {($_ => 1)} (@Config::EXPORT, @Config::EXPORT_OK); |
96 | |
97 | our %%Config; |
e3d0cac0 |
98 | |
99 | # Define our own import method to avoid pulling in the full Exporter: |
100 | sub import { |
a48f8c77 |
101 | my $pkg = shift; |
2f4f46ad |
102 | @_ = @Config::EXPORT unless @_; |
5435c704 |
103 | |
a48f8c77 |
104 | my @funcs = grep $_ ne '%%Config', @_; |
105 | my $export_Config = @funcs < @_ ? 1 : 0; |
5435c704 |
106 | |
2f4f46ad |
107 | no strict 'refs'; |
a48f8c77 |
108 | my $callpkg = caller(0); |
109 | foreach my $func (@funcs) { |
110 | die sprintf qq{"%%s" is not exported by the %%s module\n}, |
111 | $func, __PACKAGE__ unless $Export_Cache{$func}; |
112 | *{$callpkg.'::'.$func} = \&{$func}; |
113 | } |
5435c704 |
114 | |
a48f8c77 |
115 | *{"$callpkg\::Config"} = \%%Config if $export_Config; |
116 | return; |
e3d0cac0 |
117 | } |
118 | |
5435c704 |
119 | die "Perl lib version (%s) doesn't match executable version ($])" |
120 | unless $^V; |
de98c553 |
121 | |
5435c704 |
122 | $^V eq %s |
a48f8c77 |
123 | or die "Perl lib version (%s) doesn't match executable version (" . |
124 | sprintf("v%%vd",$^V) . ")"; |
a0d0e21e |
125 | |
8990e307 |
126 | ENDOFBEG |
127 | |
16d20bd9 |
128 | |
5435c704 |
129 | my @non_v = (); |
130 | my @v_fast = (); |
131 | my %v_fast = (); |
132 | my @v_others = (); |
133 | my $in_v = 0; |
134 | my %Data = (); |
135 | |
136 | # This is somewhat grim, but I want the code for parsing config.sh here and |
137 | # now so that I can expand $Config{ivsize} and $Config{ivtype} |
138 | |
139 | my $fetch_string = <<'EOT'; |
140 | |
141 | # Search for it in the big string |
142 | sub fetch_string { |
143 | my($self, $key) = @_; |
144 | |
145 | my $quote_type = "'"; |
146 | my $marker = "$key="; |
147 | |
a6d6498e |
148 | # Check for the common case, ' delimited |
3be00128 |
149 | my $start = index($Config_SH_expanded, "\n$marker$quote_type"); |
5435c704 |
150 | # If that failed, check for " delimited |
151 | if ($start == -1) { |
152 | $quote_type = '"'; |
3be00128 |
153 | $start = index($Config_SH_expanded, "\n$marker$quote_type"); |
5435c704 |
154 | } |
3be00128 |
155 | # Start can never be -1 now, as we've rigged the long string we're |
156 | # searching with an initial dummy newline. |
157 | return undef if $start == -1; |
5435c704 |
158 | |
3be00128 |
159 | $start += length($marker) + 2; |
160 | |
161 | my $value = substr($Config_SH_expanded, $start, |
162 | index($Config_SH_expanded, "$quote_type\n", $start) |
163 | - $start); |
5435c704 |
164 | |
165 | # If we had a double-quote, we'd better eval it so escape |
166 | # sequences and such can be interpolated. Since the incoming |
167 | # value is supposed to follow shell rules and not perl rules, |
168 | # we escape any perl variable markers |
169 | if ($quote_type eq '"') { |
170 | $value =~ s/\$/\\\$/g; |
171 | $value =~ s/\@/\\\@/g; |
172 | eval "\$value = \"$value\""; |
173 | } |
174 | |
175 | # So we can say "if $Config{'foo'}". |
176 | $value = undef if $value eq 'undef'; |
177 | $self->{$key} = $value; # cache it |
178 | } |
179 | EOT |
180 | |
181 | eval $fetch_string; |
182 | die if $@; |
a0d0e21e |
183 | |
2f4f46ad |
184 | { |
185 | my ($name, $val); |
186 | open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!"; |
187 | while (<CONFIG_SH>) { |
a0d0e21e |
188 | next if m:^#!/bin/sh:; |
5435c704 |
189 | |
a02608de |
190 | # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure. |
d4de4258 |
191 | s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/; |
3905a40f |
192 | my($k, $v) = ($1, $2); |
5435c704 |
193 | |
2000072c |
194 | # grandfather PATCHLEVEL and SUBVERSION and CONFIG |
cceca5ed |
195 | if ($k) { |
196 | if ($k eq 'PERL_VERSION') { |
197 | push @v_others, "PATCHLEVEL='$v'\n"; |
198 | } |
199 | elsif ($k eq 'PERL_SUBVERSION') { |
200 | push @v_others, "SUBVERSION='$v'\n"; |
201 | } |
a02608de |
202 | elsif ($k eq 'PERL_CONFIG_SH') { |
2000072c |
203 | push @v_others, "CONFIG='$v'\n"; |
204 | } |
cceca5ed |
205 | } |
5435c704 |
206 | |
435ec615 |
207 | # We can delimit things in config.sh with either ' or ". |
208 | unless ($in_v or m/^(\w+)=(['"])(.*\n)/){ |
a0d0e21e |
209 | push(@non_v, "#$_"); # not a name='value' line |
210 | next; |
211 | } |
2f4f46ad |
212 | my $quote = $2; |
5435c704 |
213 | if ($in_v) { |
214 | $val .= $_; |
215 | } |
216 | else { |
217 | ($name,$val) = ($1,$3); |
218 | } |
435ec615 |
219 | $in_v = $val !~ /$quote\n/; |
44a8e56a |
220 | next if $in_v; |
a0d0e21e |
221 | |
5435c704 |
222 | s,/,::,g if $Extensions{$name}; |
a0d0e21e |
223 | |
5435c704 |
224 | $val =~ s/$quote\n?\z//; |
3c81428c |
225 | |
5435c704 |
226 | my $line = "$name=$quote$val$quote\n"; |
227 | if (!$Common{$name}){ |
228 | push(@v_others, $line); |
229 | } |
230 | else { |
231 | push(@v_fast, $line); |
232 | $v_fast{$name} = "'$name' => $quote$val$quote"; |
233 | } |
2f4f46ad |
234 | } |
235 | close CONFIG_SH; |
5435c704 |
236 | } |
2f4f46ad |
237 | |
3c81428c |
238 | |
8468119f |
239 | # Calculation for the keys for byteorder |
240 | # This is somewhat grim, but I need to run fetch_string here. |
06482b90 |
241 | our $Config_SH_expanded = join "\n", '', @v_fast, @v_others; |
8468119f |
242 | |
243 | my $t = fetch_string ({}, 'ivtype'); |
244 | my $s = fetch_string ({}, 'ivsize'); |
245 | |
246 | # byteorder does exist on its own but we overlay a virtual |
247 | # dynamically recomputed value. |
248 | |
249 | # However, ivtype and ivsize will not vary for sane fat binaries |
250 | |
251 | my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I'; |
252 | |
253 | my $byteorder_code; |
254 | if ($s == 4 || $s == 8) { |
255 | my $list = join ',', reverse(2..$s); |
256 | my $format = 'a'x$s; |
257 | $byteorder_code = <<"EOT"; |
258 | my \$i = 0; |
259 | foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 } |
260 | \$i |= ord(1); |
2d9d8159 |
261 | our \$byteorder = join('', unpack('$format', pack('$f', \$i))); |
8468119f |
262 | EOT |
263 | } else { |
2d9d8159 |
264 | $byteorder_code = "our \$byteorder = '?'x$s;\n"; |
8468119f |
265 | } |
2d9d8159 |
266 | print CONFIG $byteorder_code; |
8468119f |
267 | |
2d9d8159 |
268 | print CONFIG_HEAVY @non_v, "\n"; |
3c81428c |
269 | |
5435c704 |
270 | # copy config summary format from the myconfig.SH script |
2d9d8159 |
271 | print CONFIG_HEAVY "our \$summary : unique = <<'!END!';\n"; |
3b5ca523 |
272 | open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!"; |
54310121 |
273 | 1 while defined($_ = <MYCONFIG>) && !/^Summary of/; |
2d9d8159 |
274 | do { print CONFIG_HEAVY $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/; |
3c81428c |
275 | close(MYCONFIG); |
a0d0e21e |
276 | |
90ec21fb |
277 | # NB. as $summary is unique, we need to copy it in a lexical variable |
278 | # before expanding it, because may have been made readonly if a perl |
279 | # interpreter has been cloned. |
280 | |
2d9d8159 |
281 | print CONFIG_HEAVY "\n!END!\n", <<'EOT'; |
90ec21fb |
282 | my $summary_expanded; |
3c81428c |
283 | |
284 | sub myconfig { |
90ec21fb |
285 | return $summary_expanded if $summary_expanded; |
286 | ($summary_expanded = $summary) =~ s{\$(\w+)} |
2d9d8159 |
287 | { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge; |
90ec21fb |
288 | $summary_expanded; |
3c81428c |
289 | } |
5435c704 |
290 | |
8468119f |
291 | local *_ = \my $a; |
292 | $_ = <<'!END!'; |
3c81428c |
293 | EOT |
294 | |
2d9d8159 |
295 | print CONFIG_HEAVY join("", @v_fast, sort @v_others); |
5435c704 |
296 | |
2d9d8159 |
297 | print CONFIG_HEAVY <<'EOT'; |
8468119f |
298 | !END! |
2d9d8159 |
299 | s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m; |
8468119f |
300 | our $Config_SH : unique = $_; |
3be00128 |
301 | |
06482b90 |
302 | our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL'; |
8468119f |
303 | EOT |
304 | |
06482b90 |
305 | foreach my $prefix (qw(ccflags ldflags)) { |
306 | my $value = fetch_string ({}, $prefix); |
307 | my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles"); |
308 | $value =~ s/\Q$withlargefiles\E\b//; |
2d9d8159 |
309 | print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n"; |
06482b90 |
310 | } |
5435c704 |
311 | |
06482b90 |
312 | foreach my $prefix (qw(libs libswanted)) { |
313 | my $value = fetch_string ({}, $prefix); |
314 | my @lflibswanted |
315 | = split(' ', fetch_string ({}, 'libswanted_uselargefiles')); |
316 | if (@lflibswanted) { |
317 | my %lflibswanted; |
318 | @lflibswanted{@lflibswanted} = (); |
319 | if ($prefix eq 'libs') { |
320 | my @libs = grep { /^-l(.+)/ && |
321 | not exists $lflibswanted{$1} } |
322 | split(' ', fetch_string ({}, 'libs')); |
323 | $value = join(' ', @libs); |
324 | } else { |
325 | my @libswanted = grep { not exists $lflibswanted{$_} } |
326 | split(' ', fetch_string ({}, 'libswanted')); |
327 | $value = join(' ', @libswanted); |
4b2ec495 |
328 | } |
435ec615 |
329 | } |
2d9d8159 |
330 | print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n"; |
5435c704 |
331 | } |
332 | |
2d9d8159 |
333 | print CONFIG_HEAVY "EOVIRTUAL\n"; |
06482b90 |
334 | |
2d9d8159 |
335 | print CONFIG_HEAVY $fetch_string; |
06482b90 |
336 | |
337 | print CONFIG <<'ENDOFEND'; |
338 | |
2d9d8159 |
339 | sub FETCH { |
5435c704 |
340 | my($self, $key) = @_; |
341 | |
342 | # check for cached value (which may be undef so we use exists not defined) |
343 | return $self->{$key} if exists $self->{$key}; |
344 | |
06482b90 |
345 | return $self->fetch_string($key); |
a0d0e21e |
346 | } |
2d9d8159 |
347 | ENDOFEND |
348 | |
349 | print CONFIG_HEAVY <<'ENDOFEND'; |
3c81428c |
350 | my $prevpos = 0; |
351 | |
a0d0e21e |
352 | sub FIRSTKEY { |
353 | $prevpos = 0; |
2ddb7828 |
354 | substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 ); |
a0d0e21e |
355 | } |
356 | |
357 | sub NEXTKEY { |
435ec615 |
358 | # Find out how the current key's quoted so we can skip to its end. |
3be00128 |
359 | my $quote = substr($Config_SH_expanded, |
360 | index($Config_SH_expanded, "=", $prevpos)+1, 1); |
361 | my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2; |
362 | my $len = index($Config_SH_expanded, "=", $pos) - $pos; |
a0d0e21e |
363 | $prevpos = $pos; |
3be00128 |
364 | $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef; |
85e6fe83 |
365 | } |
a0d0e21e |
366 | |
2ddb7828 |
367 | sub EXISTS { |
5435c704 |
368 | return 1 if exists($_[0]->{$_[1]}); |
369 | |
3be00128 |
370 | return(index($Config_SH_expanded, "\n$_[1]='") != -1 or |
2ddb7828 |
371 | index($Config_SH_expanded, "\n$_[1]=\"") != -1 |
5435c704 |
372 | ); |
a0d0e21e |
373 | } |
374 | |
3c81428c |
375 | sub STORE { die "\%Config::Config is read-only\n" } |
5435c704 |
376 | *DELETE = \&STORE; |
377 | *CLEAR = \&STORE; |
a0d0e21e |
378 | |
3c81428c |
379 | |
380 | sub config_sh { |
5435c704 |
381 | $Config_SH |
748a9306 |
382 | } |
9193ea20 |
383 | |
384 | sub config_re { |
385 | my $re = shift; |
3be00128 |
386 | return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/, |
387 | $Config_SH_expanded; |
9193ea20 |
388 | } |
389 | |
3c81428c |
390 | sub config_vars { |
307dc113 |
391 | # implements -V:cfgvar option (see perlrun -V:) |
a48f8c77 |
392 | foreach (@_) { |
307dc113 |
393 | # find optional leading, trailing colons; and query-spec |
4a305f6a |
394 | my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft, |
307dc113 |
395 | # map colon-flags to print decorations |
396 | my $prfx = $notag ? '': "$qry="; # tag-prefix for print |
397 | my $lnend = $lncont ? ' ' : ";\n"; # line ending for print |
4a305f6a |
398 | |
307dc113 |
399 | # all config-vars are by definition \w only, any \W means regex |
4a305f6a |
400 | if ($qry =~ /\W/) { |
401 | my @matches = config_re($qry); |
402 | print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag; |
403 | print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag; |
a48f8c77 |
404 | } else { |
2d9d8159 |
405 | my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry} |
406 | : 'UNKNOWN'; |
a48f8c77 |
407 | $v = 'undef' unless defined $v; |
4a305f6a |
408 | print "${prfx}'${v}'$lnend"; |
a48f8c77 |
409 | } |
3c81428c |
410 | } |
411 | } |
412 | |
2d9d8159 |
413 | # Called by the real AUTOLOAD |
414 | sub launcher { |
415 | undef &AUTOLOAD; |
416 | goto \&$Config::AUTOLOAD; |
417 | } |
418 | |
419 | 1; |
9193ea20 |
420 | ENDOFEND |
421 | |
422 | if ($^O eq 'os2') { |
a48f8c77 |
423 | print CONFIG <<'ENDOFSET'; |
9193ea20 |
424 | my %preconfig; |
425 | if ($OS2::is_aout) { |
3be00128 |
426 | my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m; |
9193ea20 |
427 | for (split ' ', $value) { |
3be00128 |
428 | ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m; |
9193ea20 |
429 | $preconfig{$_} = $v eq 'undef' ? undef : $v; |
430 | } |
431 | } |
764df951 |
432 | $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't |
9193ea20 |
433 | sub TIEHASH { bless {%preconfig} } |
434 | ENDOFSET |
a48f8c77 |
435 | # Extract the name of the DLL from the makefile to avoid duplication |
436 | my ($f) = grep -r, qw(GNUMakefile Makefile); |
437 | my $dll; |
438 | if (open my $fh, '<', $f) { |
439 | while (<$fh>) { |
440 | $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/; |
441 | } |
30500b05 |
442 | } |
a48f8c77 |
443 | print CONFIG <<ENDOFSET if $dll; |
30500b05 |
444 | \$preconfig{dll_name} = '$dll'; |
445 | ENDOFSET |
9193ea20 |
446 | } else { |
a48f8c77 |
447 | print CONFIG <<'ENDOFSET'; |
5435c704 |
448 | sub TIEHASH { |
449 | bless $_[1], $_[0]; |
450 | } |
9193ea20 |
451 | ENDOFSET |
452 | } |
453 | |
5435c704 |
454 | my $fast_config = join '', map { " $_,\n" } |
8468119f |
455 | sort values (%v_fast), 'byteorder => $byteorder' ; |
5435c704 |
456 | |
8468119f |
457 | print CONFIG sprintf <<'ENDOFTIE', $fast_config; |
9193ea20 |
458 | |
fb73857a |
459 | sub DESTROY { } |
460 | |
2d9d8159 |
461 | sub AUTOLOAD { |
462 | require 'config_heavy.pl'; |
463 | goto \&launcher; |
464 | die "&Config::AUTOLOAD failed on $Config::AUTOLOAD"; |
465 | } |
466 | |
5435c704 |
467 | tie %%Config, 'Config', { |
468 | %s |
469 | }; |
9193ea20 |
470 | |
3c81428c |
471 | 1; |
5435c704 |
472 | ENDOFTIE |
473 | |
748a9306 |
474 | |
5435c704 |
475 | open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!"; |
476 | print CONFIG_POD <<'ENDOFTAIL'; |
3c81428c |
477 | =head1 NAME |
a0d0e21e |
478 | |
3c81428c |
479 | Config - access Perl configuration information |
480 | |
481 | =head1 SYNOPSIS |
482 | |
483 | use Config; |
63f18be6 |
484 | if ($Config{usethreads}) { |
485 | print "has thread support\n" |
3c81428c |
486 | } |
487 | |
a48f8c77 |
488 | use Config qw(myconfig config_sh config_vars config_re); |
3c81428c |
489 | |
490 | print myconfig(); |
491 | |
492 | print config_sh(); |
493 | |
a48f8c77 |
494 | print config_re(); |
495 | |
3c81428c |
496 | config_vars(qw(osname archname)); |
497 | |
498 | |
499 | =head1 DESCRIPTION |
500 | |
501 | The Config module contains all the information that was available to |
502 | the C<Configure> program at Perl build time (over 900 values). |
503 | |
504 | Shell variables from the F<config.sh> file (written by Configure) are |
505 | stored in the readonly-variable C<%Config>, indexed by their names. |
506 | |
507 | Values stored in config.sh as 'undef' are returned as undefined |
1fef88e7 |
508 | values. The perl C<exists> function can be used to check if a |
3c81428c |
509 | named variable exists. |
510 | |
511 | =over 4 |
512 | |
513 | =item myconfig() |
514 | |
515 | Returns a textual summary of the major perl configuration values. |
516 | See also C<-V> in L<perlrun/Switches>. |
517 | |
518 | =item config_sh() |
519 | |
520 | Returns the entire perl configuration information in the form of the |
521 | original config.sh shell variable assignment script. |
522 | |
a48f8c77 |
523 | =item config_re($regex) |
524 | |
525 | Like config_sh() but returns, as a list, only the config entries who's |
526 | names match the $regex. |
527 | |
3c81428c |
528 | =item config_vars(@names) |
529 | |
530 | Prints to STDOUT the values of the named configuration variable. Each is |
531 | printed on a separate line in the form: |
532 | |
533 | name='value'; |
534 | |
535 | Names which are unknown are output as C<name='UNKNOWN';>. |
536 | See also C<-V:name> in L<perlrun/Switches>. |
537 | |
538 | =back |
539 | |
540 | =head1 EXAMPLE |
541 | |
542 | Here's a more sophisticated example of using %Config: |
543 | |
544 | use Config; |
743c51bc |
545 | use strict; |
546 | |
547 | my %sig_num; |
548 | my @sig_name; |
549 | unless($Config{sig_name} && $Config{sig_num}) { |
550 | die "No sigs?"; |
551 | } else { |
552 | my @names = split ' ', $Config{sig_name}; |
553 | @sig_num{@names} = split ' ', $Config{sig_num}; |
554 | foreach (@names) { |
555 | $sig_name[$sig_num{$_}] ||= $_; |
556 | } |
557 | } |
3c81428c |
558 | |
743c51bc |
559 | print "signal #17 = $sig_name[17]\n"; |
560 | if ($sig_num{ALRM}) { |
561 | print "SIGALRM is $sig_num{ALRM}\n"; |
3c81428c |
562 | } |
563 | |
564 | =head1 WARNING |
565 | |
566 | Because this information is not stored within the perl executable |
567 | itself it is possible (but unlikely) that the information does not |
568 | relate to the actual perl binary which is being used to access it. |
569 | |
570 | The Config module is installed into the architecture and version |
571 | specific library directory ($Config{installarchlib}) and it checks the |
572 | perl version number when loaded. |
573 | |
435ec615 |
574 | The values stored in config.sh may be either single-quoted or |
575 | double-quoted. Double-quoted strings are handy for those cases where you |
576 | need to include escape sequences in the strings. To avoid runtime variable |
577 | interpolation, any C<$> and C<@> characters are replaced by C<\$> and |
578 | C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$> |
579 | or C<\@> in double-quoted strings unless you're willing to deal with the |
580 | consequences. (The slashes will end up escaped and the C<$> or C<@> will |
581 | trigger variable interpolation) |
582 | |
ebc74a4b |
583 | =head1 GLOSSARY |
584 | |
585 | Most C<Config> variables are determined by the C<Configure> script |
586 | on platforms supported by it (which is most UNIX platforms). Some |
587 | platforms have custom-made C<Config> variables, and may thus not have |
588 | some of the variables described below, or may have extraneous variables |
589 | specific to that particular port. See the port specific documentation |
590 | in such cases. |
591 | |
ebc74a4b |
592 | ENDOFTAIL |
593 | |
5435c704 |
594 | if ($Opts{glossary}) { |
595 | open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!"; |
18f68570 |
596 | } |
2f4f46ad |
597 | my %seen = (); |
598 | my $text = 0; |
fb87c415 |
599 | $/ = ''; |
600 | |
601 | sub process { |
aade5aff |
602 | if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) { |
603 | my $c = substr $1, 0, 1; |
604 | unless ($seen{$c}++) { |
5435c704 |
605 | print CONFIG_POD <<EOF if $text; |
fb87c415 |
606 | =back |
ebc74a4b |
607 | |
fb87c415 |
608 | EOF |
5435c704 |
609 | print CONFIG_POD <<EOF; |
fb87c415 |
610 | =head2 $c |
611 | |
bbc7dcd2 |
612 | =over 4 |
fb87c415 |
613 | |
614 | EOF |
aade5aff |
615 | $text = 1; |
616 | } |
617 | } |
618 | elsif (!$text || !/\A\t/) { |
619 | warn "Expected a Configure variable header", |
620 | ($text ? " or another paragraph of description" : () ); |
fb87c415 |
621 | } |
622 | s/n't/n\00t/g; # leave can't, won't etc untouched |
9b22980b |
623 | s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph |
fb87c415 |
624 | s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text |
625 | s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' |
626 | s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command |
627 | s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' |
628 | s{ |
629 | (?<! [\w./<\'\"] ) # Only standalone file names |
630 | (?! e \. g \. ) # Not e.g. |
631 | (?! \. \. \. ) # Not ... |
632 | (?! \d ) # Not 5.004 |
a1151a3c |
633 | (?! read/ ) # Not read/write |
634 | (?! etc\. ) # Not etc. |
635 | (?! I/O ) # Not I/O |
636 | ( |
637 | \$ ? # Allow leading $ |
638 | [\w./]* [./] [\w./]* # Require . or / inside |
639 | ) |
640 | (?<! \. (?= [\s)] ) ) # Do not include trailing dot |
fb87c415 |
641 | (?! [\w/] ) # Include all of it |
642 | } |
643 | (F<$1>)xg; # /usr/local |
644 | s/((?<=\s)~\w*)/F<$1>/g; # ~name |
645 | s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD |
646 | s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro |
647 | s/n[\0]t/n't/g; # undo can't, won't damage |
ebc74a4b |
648 | } |
649 | |
5435c704 |
650 | if ($Opts{glossary}) { |
7701ffb5 |
651 | <GLOS>; # Skip the "DO NOT EDIT" |
652 | <GLOS>; # Skip the preamble |
18f68570 |
653 | while (<GLOS>) { |
654 | process; |
5435c704 |
655 | print CONFIG_POD; |
18f68570 |
656 | } |
fb87c415 |
657 | } |
ebc74a4b |
658 | |
5435c704 |
659 | print CONFIG_POD <<'ENDOFTAIL'; |
ebc74a4b |
660 | |
661 | =back |
662 | |
3c81428c |
663 | =head1 NOTE |
664 | |
665 | This module contains a good example of how to use tie to implement a |
666 | cache and an example of how to make a tied variable readonly to those |
667 | outside of it. |
668 | |
669 | =cut |
a0d0e21e |
670 | |
9193ea20 |
671 | ENDOFTAIL |
a0d0e21e |
672 | |
2d9d8159 |
673 | close(CONFIG_HEAVY); |
a0d0e21e |
674 | close(CONFIG); |
ebc74a4b |
675 | close(GLOS); |
5435c704 |
676 | close(CONFIG_POD); |
a0d0e21e |
677 | |
18f68570 |
678 | # Now create Cross.pm if needed |
5435c704 |
679 | if ($Opts{cross}) { |
18f68570 |
680 | open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!"; |
47bcb90d |
681 | my $cross = <<'EOS'; |
682 | # typical invocation: |
683 | # perl -MCross Makefile.PL |
684 | # perl -MCross=wince -V:cc |
685 | package Cross; |
686 | |
687 | sub import { |
688 | my ($package,$platform) = @_; |
689 | unless (defined $platform) { |
690 | # if $platform is not specified, then use last one when |
691 | # 'configpm; was invoked with --cross option |
692 | $platform = '***replace-marker***'; |
693 | } |
694 | @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC; |
e2a02c1e |
695 | $::Cross::platform = $platform; |
18f68570 |
696 | } |
47bcb90d |
697 | |
18f68570 |
698 | 1; |
699 | EOS |
5435c704 |
700 | $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g; |
47bcb90d |
701 | print CROSS $cross; |
18f68570 |
702 | close CROSS; |
703 | } |
704 | |
a0d0e21e |
705 | # Now do some simple tests on the Config.pm file we have created |
706 | unshift(@INC,'lib'); |
5435c704 |
707 | require $Config_PM; |
a0d0e21e |
708 | import Config; |
709 | |
5435c704 |
710 | die "$0: $Config_PM not valid" |
a02608de |
711 | unless $Config{'PERL_CONFIG_SH'} eq 'true'; |
a0d0e21e |
712 | |
5435c704 |
713 | die "$0: error processing $Config_PM" |
a0d0e21e |
714 | if defined($Config{'an impossible name'}) |
a02608de |
715 | or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache |
a0d0e21e |
716 | ; |
717 | |
5435c704 |
718 | die "$0: error processing $Config_PM" |
a0d0e21e |
719 | if eval '$Config{"cc"} = 1' |
720 | or eval 'delete $Config{"cc"}' |
721 | ; |
722 | |
723 | |
85e6fe83 |
724 | exit 0; |