Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | #!./miniperl -w |
8990e307 | 2 | |
75f92628 | 3 | $config_pm = $ARGV[0] || 'lib/Config.pm'; |
8990e307 LW |
4 | @ARGV = "./config.sh"; |
5 | ||
a0d0e21e LW |
6 | # list names to put first (and hence lookup fastest) |
7 | @fast = qw(osname osvers so libpth archlib | |
8 | sharpbang startsh shsharp | |
9 | dynamic_ext static_ext extensions dl_src | |
10 | sig_name ccflags cppflags intsize); | |
11 | ||
fec02dd3 AD |
12 | # names of things which may need to have slashes changed to double-colons |
13 | @extensions = qw(dynamic_ext static_ext extensions known_extensions); | |
14 | ||
a0d0e21e LW |
15 | |
16 | open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; | |
8990e307 | 17 | $myver = sprintf("%.3f", $]); |
a0d0e21e | 18 | print CONFIG <<"ENDOFBEG"; |
8990e307 LW |
19 | package Config; |
20 | require Exporter; | |
21 | \@ISA = (Exporter); | |
22 | \@EXPORT = qw(%Config); | |
23 | ||
24 | \$] == $myver or die sprintf | |
25 | "Perl lib version ($myver) doesn't match executable version (%.3f)\\n", \$]; | |
26 | ||
a0d0e21e LW |
27 | # This file was created by configpm when Perl was built. Any changes |
28 | # made to this file will be lost the next time perl is built. | |
29 | ||
8990e307 LW |
30 | ENDOFBEG |
31 | ||
16d20bd9 AD |
32 | print CONFIG <<'EndOfPod'; |
33 | =head1 NAME | |
34 | ||
35 | Config - access Perl configuration option | |
36 | ||
37 | =head1 SYNOPSIS | |
38 | ||
39 | use Config; | |
40 | if ($Config{'cc'} =~ /gcc/) { | |
41 | print "built by gcc\n"; | |
42 | } | |
43 | ||
44 | =head1 DESCRIPTION | |
45 | ||
46 | The Config module contains everything that was available to the | |
47 | C<Configure> program at Perl build time. Shell variables from | |
48 | F<config.sh> are stored in the readonly-variable C<%Config>, indexed by | |
49 | their names. | |
50 | ||
51 | =head1 EXAMPLE | |
52 | ||
53 | Here's a more sophisticated example of using %Config: | |
54 | ||
55 | use Config; | |
56 | ||
57 | defined $Config{sig_name} || die "No sigs?"; | |
58 | foreach $name (split(' ', $Config{sig_name})) { | |
59 | $signo{$name} = $i; | |
60 | $signame[$i] = $name; | |
61 | $i++; | |
62 | } | |
63 | ||
64 | print "signal #17 = $signame[17]\n"; | |
65 | if ($signo{ALRM}) { | |
66 | print "SIGALRM is $signo{ALRM}\n"; | |
67 | } | |
68 | ||
69 | =head1 NOTE | |
70 | ||
71 | This module contains a good example of how to make a variable | |
72 | readonly to those outside of it. | |
73 | ||
74 | =cut | |
75 | ||
76 | EndOfPod | |
77 | ||
a0d0e21e | 78 | @fast{@fast} = @fast; |
fec02dd3 | 79 | @extensions{@extensions} = @extensions; |
a0d0e21e LW |
80 | @non_v=(); |
81 | @v_fast=(); | |
82 | @v_others=(); | |
83 | ||
85e6fe83 | 84 | while (<>) { |
a0d0e21e LW |
85 | next if m:^#!/bin/sh:; |
86 | # Catch CONFIG=true and PATCHLEVEL=n line from Configure. | |
87 | s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/; | |
88 | unless (m/^(\w+)='(.*)'\s*$/){ | |
89 | push(@non_v, "#$_"); # not a name='value' line | |
90 | next; | |
91 | } | |
fec02dd3 AD |
92 | $name = $1; |
93 | if ($extensions{$name}) { s,/,::,g } | |
94 | if (!$fast{$name}){ push(@v_others, $_); next; } | |
a0d0e21e LW |
95 | push(@v_fast,$_); |
96 | } | |
97 | ||
98 | foreach(@non_v){ print CONFIG $_ } | |
99 | ||
100 | print CONFIG "\n", | |
101 | "\$config_sh=<<'!END!OF!CONFIG!';\n", | |
102 | join("", @v_fast, sort @v_others), | |
103 | "!END!OF!CONFIG!\n\n"; | |
104 | ||
105 | ||
106 | print CONFIG <<'ENDOFEND'; | |
107 | ||
108 | tie %Config, Config; | |
109 | sub TIEHASH { bless {} } | |
110 | sub FETCH { | |
111 | # check for cached value (which maybe undef so we use exists not defined) | |
112 | return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]}); | |
113 | ||
114 | my($value); # search for the item in the big $config_sh string | |
115 | return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); | |
116 | ||
117 | $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}". | |
118 | $_[0]->{$_[1]} = $value; # cache it | |
119 | return $value; | |
120 | } | |
121 | ||
122 | sub FIRSTKEY { | |
123 | $prevpos = 0; | |
124 | my $key; | |
125 | ($key) = $config_sh =~ m/^(.*)=/; | |
126 | $key; | |
127 | } | |
128 | ||
129 | sub NEXTKEY { | |
130 | my ($pos, $len); | |
131 | $pos = $prevpos; | |
132 | $pos = index( $config_sh, "\n", $pos) + 1; | |
133 | $prevpos = $pos; | |
134 | $len = index( $config_sh, "=", $pos) - $pos; | |
135 | $len > 0 ? substr( $config_sh, $pos, $len) : undef; | |
85e6fe83 | 136 | } |
a0d0e21e LW |
137 | |
138 | sub EXISTS{ | |
139 | exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; | |
140 | } | |
141 | ||
142 | sub readonly { die "\%Config::Config is read-only\n" } | |
143 | ||
748a9306 LW |
144 | sub myconfig { |
145 | my($output); | |
146 | ||
147 | $output = <<'END'; | |
148 | Summary of my $package (patchlevel $PATCHLEVEL) configuration: | |
149 | Platform: | |
150 | osname=$osname, osver=$osvers, archname=$archname | |
151 | uname='$myuname' | |
152 | hint=$hint | |
153 | Compiler: | |
154 | cc='$cc', optimize='$optimize' | |
155 | cppflags='$cppflags' | |
156 | ccflags ='$ccflags' | |
157 | ldflags ='$ldflags' | |
158 | stdchar='$stdchar', d_stdstdio=$d_stdstdio, usevfork=$usevfork | |
159 | voidflags=$voidflags, castflags=$castflags, d_casti32=$d_casti32, d_castneg=$d_castneg | |
160 | intsize=$intsize, alignbytes=$alignbytes, usemymalloc=$usemymalloc, randbits=$randbits | |
161 | Libraries: | |
162 | so=$so | |
163 | libpth=$libpth | |
164 | libs=$libs | |
165 | libc=$libc | |
166 | Dynamic Linking: | |
167 | dlsrc=$dlsrc, dlext=$dlext, d_dlsymun=$d_dlsymun | |
168 | cccdlflags='$cccdlflags', ccdlflags='$ccdlflags', lddlflags='$lddlflags' | |
169 | ||
170 | END | |
171 | $output =~ s/\$(\w+)/$Config{$1}/ge; | |
172 | $output; | |
173 | } | |
174 | ||
a0d0e21e LW |
175 | sub STORE { &readonly } |
176 | sub DELETE{ &readonly } | |
177 | sub CLEAR { &readonly } | |
178 | ||
8e07c86e | 179 | sub config_sh { $config_sh } |
a0d0e21e LW |
180 | |
181 | 1; | |
182 | ENDOFEND | |
183 | ||
184 | close(CONFIG); | |
185 | ||
186 | # Now do some simple tests on the Config.pm file we have created | |
187 | unshift(@INC,'lib'); | |
188 | require $config_pm; | |
189 | import Config; | |
190 | ||
191 | die "$0: $config_pm not valid" | |
192 | unless $Config{'CONFIG'} eq 'true'; | |
193 | ||
194 | die "$0: error processing $config_pm" | |
195 | if defined($Config{'an impossible name'}) | |
196 | or $Config{'CONFIG'} ne 'true' # test cache | |
197 | ; | |
198 | ||
199 | die "$0: error processing $config_pm" | |
200 | if eval '$Config{"cc"} = 1' | |
201 | or eval 'delete $Config{"cc"}' | |
202 | ; | |
203 | ||
204 | ||
85e6fe83 | 205 | exit 0; |