Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | #!./miniperl -w |
8990e307 | 2 | |
5435c704 NC |
3 | # commonly used names to put first (and hence lookup fastest) |
4 | my %Common = map {($_,$_)} | |
5 | qw(archname osname osvers prefix libs libpth | |
6 | dynamic_ext static_ext dlsrc so | |
7 | cc ccflags cppflags | |
8 | privlibexp archlibexp installprivlib installarchlib | |
9 | sharpbang startsh shsharp | |
10 | ); | |
11 | ||
12 | # names of things which may need to have slashes changed to double-colons | |
13 | my %Extensions = map {($_,$_)} | |
14 | qw(dynamic_ext static_ext extensions known_extensions); | |
15 | ||
16 | # allowed opts as well as specifies default and initial values | |
17 | my %Allowed_Opts = ( | |
18 | 'cross' => '', # --cross=PALTFORM - crosscompiling for PLATFORM | |
19 | 'glossary' => 1, # --no-glossary - no glossary file inclusion, | |
20 | # for compactness | |
18f68570 | 21 | ); |
18f68570 | 22 | |
5435c704 NC |
23 | sub opts { |
24 | # user specified options | |
25 | my %given_opts = ( | |
26 | # --opt=smth | |
27 | (map {/^--([\-_\w]+)=(.*)$/} @ARGV), | |
28 | # --opt --no-opt --noopt | |
29 | (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV), | |
30 | ); | |
31 | ||
32 | my %opts = (%Allowed_Opts, %given_opts); | |
33 | ||
34 | for my $opt (grep {!exists $Allowed_Opts{$_}} keys %given_opts) { | |
35 | die "option '$opt' is not recognized"; | |
36 | } | |
37 | @ARGV = grep {!/^--/} @ARGV; | |
38 | ||
39 | return %opts; | |
40 | } | |
18f68570 | 41 | |
5435c704 NC |
42 | |
43 | my %Opts = opts(); | |
44 | ||
45 | my $Config_PM; | |
46 | my $Glossary = $ARGV[1] || 'Porting/Glossary'; | |
47 | ||
48 | if ($Opts{cross}) { | |
18f68570 VK |
49 | # creating cross-platform config file |
50 | mkdir "xlib"; | |
5435c704 NC |
51 | mkdir "xlib/$Opts{cross}"; |
52 | $Config_PM = $ARGV[0] || "xlib/$Opts{cross}/Config.pm"; | |
18f68570 VK |
53 | } |
54 | else { | |
5435c704 | 55 | $Config_PM = $ARGV[0] || 'lib/Config.pm'; |
18f68570 VK |
56 | } |
57 | ||
8990e307 | 58 | |
5435c704 | 59 | open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n"; |
fec02dd3 | 60 | |
5435c704 | 61 | my $myver = sprintf "v%vd", $^V; |
a0d0e21e | 62 | |
5435c704 NC |
63 | printf CONFIG <<'ENDOFBEG', ($myver) x 3; |
64 | # This file was created by configpm when Perl was built. Any changes | |
65 | # made to this file will be lost the next time perl is built. | |
3c81428c | 66 | |
8990e307 | 67 | package Config; |
5435c704 | 68 | @EXPORT = qw(%%Config); |
a48f8c77 MS |
69 | @EXPORT_OK = qw(myconfig config_sh config_vars config_re); |
70 | ||
71 | my %%Export_Cache = map {($_ => 1)} (@EXPORT, @EXPORT_OK); | |
e3d0cac0 IZ |
72 | |
73 | # Define our own import method to avoid pulling in the full Exporter: | |
74 | sub import { | |
a48f8c77 MS |
75 | my $pkg = shift; |
76 | @_ = @EXPORT unless @_; | |
5435c704 | 77 | |
a48f8c77 MS |
78 | my @funcs = grep $_ ne '%%Config', @_; |
79 | my $export_Config = @funcs < @_ ? 1 : 0; | |
5435c704 | 80 | |
a48f8c77 MS |
81 | my $callpkg = caller(0); |
82 | foreach my $func (@funcs) { | |
83 | die sprintf qq{"%%s" is not exported by the %%s module\n}, | |
84 | $func, __PACKAGE__ unless $Export_Cache{$func}; | |
85 | *{$callpkg.'::'.$func} = \&{$func}; | |
86 | } | |
5435c704 | 87 | |
a48f8c77 MS |
88 | *{"$callpkg\::Config"} = \%%Config if $export_Config; |
89 | return; | |
e3d0cac0 IZ |
90 | } |
91 | ||
5435c704 NC |
92 | die "Perl lib version (%s) doesn't match executable version ($])" |
93 | unless $^V; | |
de98c553 | 94 | |
5435c704 | 95 | $^V eq %s |
a48f8c77 MS |
96 | or die "Perl lib version (%s) doesn't match executable version (" . |
97 | sprintf("v%%vd",$^V) . ")"; | |
a0d0e21e | 98 | |
8990e307 LW |
99 | ENDOFBEG |
100 | ||
16d20bd9 | 101 | |
5435c704 NC |
102 | my @non_v = (); |
103 | my @v_fast = (); | |
104 | my %v_fast = (); | |
105 | my @v_others = (); | |
106 | my $in_v = 0; | |
107 | my %Data = (); | |
108 | ||
109 | # This is somewhat grim, but I want the code for parsing config.sh here and | |
110 | # now so that I can expand $Config{ivsize} and $Config{ivtype} | |
111 | ||
112 | my $fetch_string = <<'EOT'; | |
113 | ||
114 | # Search for it in the big string | |
115 | sub fetch_string { | |
116 | my($self, $key) = @_; | |
117 | ||
118 | my $quote_type = "'"; | |
119 | my $marker = "$key="; | |
120 | ||
a6d6498e | 121 | # Check for the common case, ' delimited |
5435c704 NC |
122 | my $start = index($Config_SH, "\n$marker$quote_type"); |
123 | # If that failed, check for " delimited | |
124 | if ($start == -1) { | |
125 | $quote_type = '"'; | |
126 | $start = index($Config_SH, "\n$marker$quote_type"); | |
127 | } | |
128 | return undef if ( ($start == -1) && # in case it's first | |
129 | (substr($Config_SH, 0, length($marker)) ne $marker) ); | |
130 | if ($start == -1) { | |
131 | # It's the very first thing we found. Skip $start forward | |
132 | # and figure out the quote mark after the =. | |
133 | $start = length($marker) + 1; | |
134 | $quote_type = substr($Config_SH, $start - 1, 1); | |
135 | } | |
136 | else { | |
137 | $start += length($marker) + 2; | |
138 | } | |
139 | ||
140 | my $value = substr($Config_SH, $start, | |
141 | index($Config_SH, "$quote_type\n", $start) - $start); | |
142 | ||
143 | # If we had a double-quote, we'd better eval it so escape | |
144 | # sequences and such can be interpolated. Since the incoming | |
145 | # value is supposed to follow shell rules and not perl rules, | |
146 | # we escape any perl variable markers | |
147 | if ($quote_type eq '"') { | |
148 | $value =~ s/\$/\\\$/g; | |
149 | $value =~ s/\@/\\\@/g; | |
150 | eval "\$value = \"$value\""; | |
151 | } | |
152 | ||
153 | # So we can say "if $Config{'foo'}". | |
154 | $value = undef if $value eq 'undef'; | |
155 | $self->{$key} = $value; # cache it | |
156 | } | |
157 | EOT | |
158 | ||
159 | eval $fetch_string; | |
160 | die if $@; | |
a0d0e21e | 161 | |
5435c704 NC |
162 | open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!"; |
163 | while (<CONFIG_SH>) { | |
a0d0e21e | 164 | next if m:^#!/bin/sh:; |
5435c704 | 165 | |
a02608de | 166 | # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure. |
d4de4258 | 167 | s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/; |
3905a40f | 168 | my($k, $v) = ($1, $2); |
5435c704 | 169 | |
2000072c | 170 | # grandfather PATCHLEVEL and SUBVERSION and CONFIG |
cceca5ed GS |
171 | if ($k) { |
172 | if ($k eq 'PERL_VERSION') { | |
173 | push @v_others, "PATCHLEVEL='$v'\n"; | |
174 | } | |
175 | elsif ($k eq 'PERL_SUBVERSION') { | |
176 | push @v_others, "SUBVERSION='$v'\n"; | |
177 | } | |
a02608de | 178 | elsif ($k eq 'PERL_CONFIG_SH') { |
2000072c JH |
179 | push @v_others, "CONFIG='$v'\n"; |
180 | } | |
cceca5ed | 181 | } |
5435c704 | 182 | |
435ec615 HM |
183 | # We can delimit things in config.sh with either ' or ". |
184 | unless ($in_v or m/^(\w+)=(['"])(.*\n)/){ | |
a0d0e21e LW |
185 | push(@non_v, "#$_"); # not a name='value' line |
186 | next; | |
187 | } | |
435ec615 | 188 | $quote = $2; |
5435c704 NC |
189 | if ($in_v) { |
190 | $val .= $_; | |
191 | } | |
192 | else { | |
193 | ($name,$val) = ($1,$3); | |
194 | } | |
435ec615 | 195 | $in_v = $val !~ /$quote\n/; |
44a8e56a | 196 | next if $in_v; |
a0d0e21e | 197 | |
5435c704 | 198 | s,/,::,g if $Extensions{$name}; |
a0d0e21e | 199 | |
5435c704 | 200 | $val =~ s/$quote\n?\z//; |
3c81428c | 201 | |
5435c704 NC |
202 | my $line = "$name=$quote$val$quote\n"; |
203 | if (!$Common{$name}){ | |
204 | push(@v_others, $line); | |
205 | } | |
206 | else { | |
207 | push(@v_fast, $line); | |
208 | $v_fast{$name} = "'$name' => $quote$val$quote"; | |
209 | } | |
210 | } | |
211 | close CONFIG_SH; | |
3c81428c | 212 | |
5435c704 | 213 | print CONFIG @non_v, "\n"; |
3c81428c | 214 | |
5435c704 NC |
215 | # copy config summary format from the myconfig.SH script |
216 | print CONFIG "my \$summary = <<'!END!';\n"; | |
3b5ca523 | 217 | open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!"; |
54310121 | 218 | 1 while defined($_ = <MYCONFIG>) && !/^Summary of/; |
219 | do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/; | |
3c81428c | 220 | close(MYCONFIG); |
a0d0e21e | 221 | |
3c81428c | 222 | print CONFIG "\n!END!\n", <<'EOT'; |
223 | my $summary_expanded = 0; | |
224 | ||
225 | sub myconfig { | |
a48f8c77 MS |
226 | return $summary if $summary_expanded; |
227 | $summary =~ s{\$(\w+)} | |
228 | { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; | |
229 | $summary_expanded = 1; | |
230 | $summary; | |
3c81428c | 231 | } |
5435c704 | 232 | |
3161c2f8 | 233 | our $Config_SH : unique = <<'!END!'; |
3c81428c | 234 | EOT |
235 | ||
5435c704 NC |
236 | print CONFIG join("", @v_fast, sort @v_others); |
237 | ||
238 | print CONFIG "!END!\n", $fetch_string; | |
a0d0e21e LW |
239 | |
240 | print CONFIG <<'ENDOFEND'; | |
241 | ||
5435c704 NC |
242 | sub fetch_virtual { |
243 | my($self, $key) = @_; | |
244 | ||
245 | my $value; | |
246 | ||
247 | if ($key =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) { | |
4b2ec495 JH |
248 | # These are purely virtual, they do not exist, but need to |
249 | # be computed on demand for largefile-incapable extensions. | |
5435c704 | 250 | my $new_key = "${1}_uselargefiles"; |
4b2ec495 | 251 | $value = $Config{$1}; |
5435c704 NC |
252 | my $withlargefiles = $Config{$new_key}; |
253 | if ($new_key =~ /^(?:cc|ld)flags_/) { | |
4b2ec495 | 254 | $value =~ s/\Q$withlargefiles\E\b//; |
5435c704 | 255 | } elsif ($new_key =~ /^libs/) { |
45c9e83b | 256 | my @lflibswanted = split(' ', $Config{libswanted_uselargefiles}); |
4b2ec495 JH |
257 | if (@lflibswanted) { |
258 | my %lflibswanted; | |
259 | @lflibswanted{@lflibswanted} = (); | |
5435c704 | 260 | if ($new_key =~ /^libs_/) { |
4b2ec495 JH |
261 | my @libs = grep { /^-l(.+)/ && |
262 | not exists $lflibswanted{$1} } | |
263 | split(' ', $Config{libs}); | |
264 | $Config{libs} = join(' ', @libs); | |
5435c704 | 265 | } elsif ($new_key =~ /^libswanted_/) { |
4b2ec495 JH |
266 | my @libswanted = grep { not exists $lflibswanted{$_} } |
267 | split(' ', $Config{libswanted}); | |
268 | $Config{libswanted} = join(' ', @libswanted); | |
269 | } | |
270 | } | |
271 | } | |
435ec615 | 272 | } |
5435c704 NC |
273 | |
274 | $self->{$key} = $value; | |
275 | } | |
276 | ||
277 | sub FETCH { | |
278 | my($self, $key) = @_; | |
279 | ||
280 | # check for cached value (which may be undef so we use exists not defined) | |
281 | return $self->{$key} if exists $self->{$key}; | |
282 | ||
283 | $self->fetch_string($key); | |
284 | return $self->{$key} if exists $self->{$key}; | |
285 | $self->fetch_virtual($key); | |
286 | ||
287 | # Might not exist, in which undef is correct. | |
288 | return $self->{$key}; | |
a0d0e21e LW |
289 | } |
290 | ||
3c81428c | 291 | my $prevpos = 0; |
292 | ||
a0d0e21e LW |
293 | sub FIRSTKEY { |
294 | $prevpos = 0; | |
5435c704 | 295 | substr($Config_SH, 0, index($Config_SH, '=') ); |
a0d0e21e LW |
296 | } |
297 | ||
298 | sub NEXTKEY { | |
435ec615 | 299 | # Find out how the current key's quoted so we can skip to its end. |
5435c704 NC |
300 | my $quote = substr($Config_SH, index($Config_SH, "=", $prevpos)+1, 1); |
301 | my $pos = index($Config_SH, qq($quote\n), $prevpos) + 2; | |
302 | my $len = index($Config_SH, "=", $pos) - $pos; | |
a0d0e21e | 303 | $prevpos = $pos; |
5435c704 | 304 | $len > 0 ? substr($Config_SH, $pos, $len) : undef; |
85e6fe83 | 305 | } |
a0d0e21e | 306 | |
3c81428c | 307 | sub EXISTS { |
5435c704 NC |
308 | return 1 if exists($_[0]->{$_[1]}); |
309 | ||
310 | return(index($Config_SH, "\n$_[1]='") != -1 or | |
311 | substr($Config_SH, 0, length($_[1])+2) eq "$_[1]='" or | |
312 | index($Config_SH, "\n$_[1]=\"") != -1 or | |
313 | substr($Config_SH, 0, length($_[1])+2) eq "$_[1]=\"" or | |
314 | $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/ | |
315 | ); | |
a0d0e21e LW |
316 | } |
317 | ||
3c81428c | 318 | sub STORE { die "\%Config::Config is read-only\n" } |
5435c704 NC |
319 | *DELETE = \&STORE; |
320 | *CLEAR = \&STORE; | |
a0d0e21e | 321 | |
3c81428c | 322 | |
323 | sub config_sh { | |
5435c704 | 324 | $Config_SH |
748a9306 | 325 | } |
9193ea20 | 326 | |
327 | sub config_re { | |
328 | my $re = shift; | |
36ff553a | 329 | return map { chomp; $_ } grep /^$re=/, split /^/, $Config_SH; |
9193ea20 | 330 | } |
331 | ||
3c81428c | 332 | sub config_vars { |
a48f8c77 MS |
333 | foreach (@_) { |
334 | if (/\W/) { | |
335 | my @matches = config_re($_); | |
336 | print map "$_\n", @matches ? @matches : "$_: not found"; | |
337 | } else { | |
338 | my $v = (exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; | |
339 | $v = 'undef' unless defined $v; | |
340 | print "$_='$v';\n"; | |
341 | } | |
3c81428c | 342 | } |
343 | } | |
344 | ||
9193ea20 | 345 | ENDOFEND |
346 | ||
347 | if ($^O eq 'os2') { | |
a48f8c77 | 348 | print CONFIG <<'ENDOFSET'; |
9193ea20 | 349 | my %preconfig; |
350 | if ($OS2::is_aout) { | |
5435c704 | 351 | my ($value, $v) = $Config_SH =~ m/^used_aout='(.*)'\s*$/m; |
9193ea20 | 352 | for (split ' ', $value) { |
5435c704 | 353 | ($v) = $Config_SH =~ m/^aout_$_='(.*)'\s*$/m; |
9193ea20 | 354 | $preconfig{$_} = $v eq 'undef' ? undef : $v; |
355 | } | |
356 | } | |
764df951 | 357 | $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't |
9193ea20 | 358 | sub TIEHASH { bless {%preconfig} } |
359 | ENDOFSET | |
a48f8c77 MS |
360 | # Extract the name of the DLL from the makefile to avoid duplication |
361 | my ($f) = grep -r, qw(GNUMakefile Makefile); | |
362 | my $dll; | |
363 | if (open my $fh, '<', $f) { | |
364 | while (<$fh>) { | |
365 | $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/; | |
366 | } | |
30500b05 | 367 | } |
a48f8c77 | 368 | print CONFIG <<ENDOFSET if $dll; |
30500b05 IZ |
369 | \$preconfig{dll_name} = '$dll'; |
370 | ENDOFSET | |
9193ea20 | 371 | } else { |
a48f8c77 | 372 | print CONFIG <<'ENDOFSET'; |
5435c704 NC |
373 | sub TIEHASH { |
374 | bless $_[1], $_[0]; | |
375 | } | |
9193ea20 | 376 | ENDOFSET |
377 | } | |
378 | ||
5435c704 NC |
379 | |
380 | # Calculation for the keys for byteorder | |
381 | # This is somewhat grim, but I need to run fetch_string here. | |
382 | our $Config_SH = join "\n", @v_fast, @v_others; | |
383 | ||
384 | my $t = fetch_string ({}, 'ivtype'); | |
385 | my $s = fetch_string ({}, 'ivsize'); | |
386 | ||
387 | # byteorder does exist on its own but we overlay a virtual | |
388 | # dynamically recomputed value. | |
389 | ||
390 | # However, ivtype and ivsize will not vary for sane fat binaries | |
391 | ||
392 | my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I'; | |
393 | ||
394 | my $byteorder_code; | |
395 | if ($s == 4 || $s == 8) { | |
a48f8c77 MS |
396 | my $list = join ',', reverse(2..$s); |
397 | my $format = 'a'x$s; | |
398 | $byteorder_code = <<"EOT"; | |
5435c704 NC |
399 | my \$i = 0; |
400 | foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 } | |
401 | \$i |= ord(1); | |
402 | my \$value = join('', unpack('$format', pack('$f', \$i))); | |
403 | EOT | |
404 | } else { | |
a48f8c77 | 405 | $byteorder_code = "\$value = '?'x$s;\n"; |
5435c704 NC |
406 | } |
407 | ||
408 | my $fast_config = join '', map { " $_,\n" } | |
15297a7d | 409 | sort values (%v_fast), 'byteorder => $value' ; |
5435c704 NC |
410 | |
411 | print CONFIG sprintf <<'ENDOFTIE', $byteorder_code, $fast_config; | |
9193ea20 | 412 | |
fb73857a | 413 | # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD |
414 | sub DESTROY { } | |
415 | ||
5435c704 NC |
416 | %s |
417 | ||
418 | tie %%Config, 'Config', { | |
419 | %s | |
420 | }; | |
9193ea20 | 421 | |
3c81428c | 422 | 1; |
5435c704 NC |
423 | ENDOFTIE |
424 | ||
748a9306 | 425 | |
5435c704 NC |
426 | open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!"; |
427 | print CONFIG_POD <<'ENDOFTAIL'; | |
3c81428c | 428 | =head1 NAME |
a0d0e21e | 429 | |
3c81428c | 430 | Config - access Perl configuration information |
431 | ||
432 | =head1 SYNOPSIS | |
433 | ||
434 | use Config; | |
435 | if ($Config{'cc'} =~ /gcc/) { | |
436 | print "built by gcc\n"; | |
437 | } | |
438 | ||
a48f8c77 | 439 | use Config qw(myconfig config_sh config_vars config_re); |
3c81428c | 440 | |
441 | print myconfig(); | |
442 | ||
443 | print config_sh(); | |
444 | ||
a48f8c77 MS |
445 | print config_re(); |
446 | ||
3c81428c | 447 | config_vars(qw(osname archname)); |
448 | ||
449 | ||
450 | =head1 DESCRIPTION | |
451 | ||
452 | The Config module contains all the information that was available to | |
453 | the C<Configure> program at Perl build time (over 900 values). | |
454 | ||
455 | Shell variables from the F<config.sh> file (written by Configure) are | |
456 | stored in the readonly-variable C<%Config>, indexed by their names. | |
457 | ||
458 | Values stored in config.sh as 'undef' are returned as undefined | |
1fef88e7 | 459 | values. The perl C<exists> function can be used to check if a |
3c81428c | 460 | named variable exists. |
461 | ||
462 | =over 4 | |
463 | ||
464 | =item myconfig() | |
465 | ||
466 | Returns a textual summary of the major perl configuration values. | |
467 | See also C<-V> in L<perlrun/Switches>. | |
468 | ||
469 | =item config_sh() | |
470 | ||
471 | Returns the entire perl configuration information in the form of the | |
472 | original config.sh shell variable assignment script. | |
473 | ||
a48f8c77 MS |
474 | =item config_re($regex) |
475 | ||
476 | Like config_sh() but returns, as a list, only the config entries who's | |
477 | names match the $regex. | |
478 | ||
3c81428c | 479 | =item config_vars(@names) |
480 | ||
481 | Prints to STDOUT the values of the named configuration variable. Each is | |
482 | printed on a separate line in the form: | |
483 | ||
484 | name='value'; | |
485 | ||
486 | Names which are unknown are output as C<name='UNKNOWN';>. | |
487 | See also C<-V:name> in L<perlrun/Switches>. | |
488 | ||
489 | =back | |
490 | ||
491 | =head1 EXAMPLE | |
492 | ||
493 | Here's a more sophisticated example of using %Config: | |
494 | ||
495 | use Config; | |
743c51bc W |
496 | use strict; |
497 | ||
498 | my %sig_num; | |
499 | my @sig_name; | |
500 | unless($Config{sig_name} && $Config{sig_num}) { | |
501 | die "No sigs?"; | |
502 | } else { | |
503 | my @names = split ' ', $Config{sig_name}; | |
504 | @sig_num{@names} = split ' ', $Config{sig_num}; | |
505 | foreach (@names) { | |
506 | $sig_name[$sig_num{$_}] ||= $_; | |
507 | } | |
508 | } | |
3c81428c | 509 | |
743c51bc W |
510 | print "signal #17 = $sig_name[17]\n"; |
511 | if ($sig_num{ALRM}) { | |
512 | print "SIGALRM is $sig_num{ALRM}\n"; | |
3c81428c | 513 | } |
514 | ||
515 | =head1 WARNING | |
516 | ||
517 | Because this information is not stored within the perl executable | |
518 | itself it is possible (but unlikely) that the information does not | |
519 | relate to the actual perl binary which is being used to access it. | |
520 | ||
521 | The Config module is installed into the architecture and version | |
522 | specific library directory ($Config{installarchlib}) and it checks the | |
523 | perl version number when loaded. | |
524 | ||
435ec615 HM |
525 | The values stored in config.sh may be either single-quoted or |
526 | double-quoted. Double-quoted strings are handy for those cases where you | |
527 | need to include escape sequences in the strings. To avoid runtime variable | |
528 | interpolation, any C<$> and C<@> characters are replaced by C<\$> and | |
529 | C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$> | |
530 | or C<\@> in double-quoted strings unless you're willing to deal with the | |
531 | consequences. (The slashes will end up escaped and the C<$> or C<@> will | |
532 | trigger variable interpolation) | |
533 | ||
ebc74a4b GS |
534 | =head1 GLOSSARY |
535 | ||
536 | Most C<Config> variables are determined by the C<Configure> script | |
537 | on platforms supported by it (which is most UNIX platforms). Some | |
538 | platforms have custom-made C<Config> variables, and may thus not have | |
539 | some of the variables described below, or may have extraneous variables | |
540 | specific to that particular port. See the port specific documentation | |
541 | in such cases. | |
542 | ||
ebc74a4b GS |
543 | ENDOFTAIL |
544 | ||
5435c704 NC |
545 | if ($Opts{glossary}) { |
546 | open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!"; | |
18f68570 | 547 | } |
fb87c415 IZ |
548 | %seen = (); |
549 | $text = 0; | |
550 | $/ = ''; | |
551 | ||
552 | sub process { | |
aade5aff YST |
553 | if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) { |
554 | my $c = substr $1, 0, 1; | |
555 | unless ($seen{$c}++) { | |
5435c704 | 556 | print CONFIG_POD <<EOF if $text; |
fb87c415 | 557 | =back |
ebc74a4b | 558 | |
fb87c415 | 559 | EOF |
5435c704 | 560 | print CONFIG_POD <<EOF; |
fb87c415 IZ |
561 | =head2 $c |
562 | ||
bbc7dcd2 | 563 | =over 4 |
fb87c415 IZ |
564 | |
565 | EOF | |
aade5aff YST |
566 | $text = 1; |
567 | } | |
568 | } | |
569 | elsif (!$text || !/\A\t/) { | |
570 | warn "Expected a Configure variable header", | |
571 | ($text ? " or another paragraph of description" : () ); | |
fb87c415 IZ |
572 | } |
573 | s/n't/n\00t/g; # leave can't, won't etc untouched | |
9b22980b | 574 | s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph |
fb87c415 IZ |
575 | s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text |
576 | s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' | |
577 | s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command | |
578 | s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' | |
579 | s{ | |
580 | (?<! [\w./<\'\"] ) # Only standalone file names | |
581 | (?! e \. g \. ) # Not e.g. | |
582 | (?! \. \. \. ) # Not ... | |
583 | (?! \d ) # Not 5.004 | |
a1151a3c RGS |
584 | (?! read/ ) # Not read/write |
585 | (?! etc\. ) # Not etc. | |
586 | (?! I/O ) # Not I/O | |
587 | ( | |
588 | \$ ? # Allow leading $ | |
589 | [\w./]* [./] [\w./]* # Require . or / inside | |
590 | ) | |
591 | (?<! \. (?= [\s)] ) ) # Do not include trailing dot | |
fb87c415 IZ |
592 | (?! [\w/] ) # Include all of it |
593 | } | |
594 | (F<$1>)xg; # /usr/local | |
595 | s/((?<=\s)~\w*)/F<$1>/g; # ~name | |
596 | s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD | |
597 | s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro | |
598 | s/n[\0]t/n't/g; # undo can't, won't damage | |
ebc74a4b GS |
599 | } |
600 | ||
5435c704 | 601 | if ($Opts{glossary}) { |
7701ffb5 JH |
602 | <GLOS>; # Skip the "DO NOT EDIT" |
603 | <GLOS>; # Skip the preamble | |
18f68570 VK |
604 | while (<GLOS>) { |
605 | process; | |
5435c704 | 606 | print CONFIG_POD; |
18f68570 | 607 | } |
fb87c415 | 608 | } |
ebc74a4b | 609 | |
5435c704 | 610 | print CONFIG_POD <<'ENDOFTAIL'; |
ebc74a4b GS |
611 | |
612 | =back | |
613 | ||
3c81428c | 614 | =head1 NOTE |
615 | ||
616 | This module contains a good example of how to use tie to implement a | |
617 | cache and an example of how to make a tied variable readonly to those | |
618 | outside of it. | |
619 | ||
620 | =cut | |
a0d0e21e | 621 | |
9193ea20 | 622 | ENDOFTAIL |
a0d0e21e LW |
623 | |
624 | close(CONFIG); | |
ebc74a4b | 625 | close(GLOS); |
5435c704 | 626 | close(CONFIG_POD); |
a0d0e21e | 627 | |
18f68570 | 628 | # Now create Cross.pm if needed |
5435c704 | 629 | if ($Opts{cross}) { |
18f68570 | 630 | open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!"; |
47bcb90d VK |
631 | my $cross = <<'EOS'; |
632 | # typical invocation: | |
633 | # perl -MCross Makefile.PL | |
634 | # perl -MCross=wince -V:cc | |
635 | package Cross; | |
636 | ||
637 | sub import { | |
638 | my ($package,$platform) = @_; | |
639 | unless (defined $platform) { | |
640 | # if $platform is not specified, then use last one when | |
641 | # 'configpm; was invoked with --cross option | |
642 | $platform = '***replace-marker***'; | |
643 | } | |
644 | @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC; | |
e2a02c1e | 645 | $::Cross::platform = $platform; |
18f68570 | 646 | } |
47bcb90d | 647 | |
18f68570 VK |
648 | 1; |
649 | EOS | |
5435c704 | 650 | $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g; |
47bcb90d | 651 | print CROSS $cross; |
18f68570 VK |
652 | close CROSS; |
653 | } | |
654 | ||
a0d0e21e LW |
655 | # Now do some simple tests on the Config.pm file we have created |
656 | unshift(@INC,'lib'); | |
5435c704 | 657 | require $Config_PM; |
a0d0e21e LW |
658 | import Config; |
659 | ||
5435c704 | 660 | die "$0: $Config_PM not valid" |
a02608de | 661 | unless $Config{'PERL_CONFIG_SH'} eq 'true'; |
a0d0e21e | 662 | |
5435c704 | 663 | die "$0: error processing $Config_PM" |
a0d0e21e | 664 | if defined($Config{'an impossible name'}) |
a02608de | 665 | or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache |
a0d0e21e LW |
666 | ; |
667 | ||
5435c704 | 668 | die "$0: error processing $Config_PM" |
a0d0e21e LW |
669 | if eval '$Config{"cc"} = 1' |
670 | or eval 'delete $Config{"cc"}' | |
671 | ; | |
672 | ||
673 | ||
85e6fe83 | 674 | exit 0; |