diff options
Diffstat (limited to 'configpm')
| -rwxr-xr-x | configpm | 238 |
1 files changed, 144 insertions, 94 deletions
@@ -4,10 +4,12 @@ $config_pm = $ARGV[0] || 'lib/Config.pm'; @ARGV = "./config.sh"; # list names to put first (and hence lookup fastest) -@fast = qw(osname osvers so libpth archlib +@fast = qw(archname osname osvers prefix libs libpth + dynamic_ext static_ext extensions dlsrc so + sig_name cc ccflags cppflags + privlibexp archlibexp installprivlib installarchlib sharpbang startsh shsharp - dynamic_ext static_ext extensions dl_src - sig_name ccflags cppflags intsize); +); # names of things which may need to have slashes changed to double-colons @extensions = qw(dynamic_ext static_ext extensions known_extensions); @@ -15,11 +17,13 @@ $config_pm = $ARGV[0] || 'lib/Config.pm'; open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; $myver = sprintf("%.3f", $]); + print CONFIG <<"ENDOFBEG"; package Config; -require Exporter; +use Exporter (); \@ISA = (Exporter); \@EXPORT = qw(%Config); +\@EXPORT_OK = qw(myconfig config_sh config_vars); \$] == $myver or die sprintf "Perl lib version ($myver) doesn't match executable version (%.3f)\\n", \$]; @@ -29,51 +33,6 @@ require Exporter; ENDOFBEG -print CONFIG <<'EndOfPod'; -=head1 NAME - -Config - access Perl configuration option - -=head1 SYNOPSIS - - use Config; - if ($Config{'cc'} =~ /gcc/) { - print "built by gcc\n"; - } - -=head1 DESCRIPTION - -The Config module contains everything that was available to the -C<Configure> program at Perl build time. Shell variables from -F<config.sh> are stored in the readonly-variable C<%Config>, indexed by -their names. - -=head1 EXAMPLE - -Here's a more sophisticated example of using %Config: - - use Config; - - defined $Config{sig_name} || die "No sigs?"; - foreach $name (split(' ', $Config{sig_name})) { - $signo{$name} = $i; - $signame[$i] = $name; - $i++; - } - - print "signal #17 = $signame[17]\n"; - if ($signo{ALRM}) { - print "SIGALRM is $signo{ALRM}\n"; - } - -=head1 NOTE - -This module contains a good example of how to make a variable -readonly to those outside of it. - -=cut - -EndOfPod @fast{@fast} = @fast; @extensions{@extensions} = @extensions; @@ -98,10 +57,31 @@ while (<>) { foreach(@non_v){ print CONFIG $_ } print CONFIG "\n", - "\$config_sh=<<'!END!OF!CONFIG!';\n", + "my \$config_sh = <<'!END!';\n", join("", @v_fast, sort @v_others), - "!END!OF!CONFIG!\n\n"; + "!END!\n\n"; + +# copy config summary format from the myconfig script + +print CONFIG "my \$summary = <<'!END!';\n"; + +open(MYCONFIG,"<myconfig") || die "open myconfig failed: $!"; +1 while( ($_=<MYCONFIG>) !~ /^Summary of/); +do { print CONFIG $_ } until ($_ = <MYCONFIG>) =~ /^\s*$/; +close(MYCONFIG); +print CONFIG "\n!END!\n", <<'EOT'; +my $summary_expanded = 0; + +sub myconfig { + return $summary if $summary_expanded; + $summary =~ s/\$(\w+)/$Config{$1}/ge; + $summary_expanded = 1; + $summary; +} +EOT + +# ---- print CONFIG <<'ENDOFEND'; @@ -119,66 +99,136 @@ sub FETCH { return $value; } +my $prevpos = 0; + sub FIRSTKEY { $prevpos = 0; - my $key; - ($key) = $config_sh =~ m/^(.*)=/; + my($key) = $config_sh =~ m/^(.*?)=/; $key; } sub NEXTKEY { - my ($pos, $len); - $pos = $prevpos; - $pos = index( $config_sh, "\n", $pos) + 1; + my $pos = index($config_sh, "\n", $prevpos) + 1; + my $len = index($config_sh, "=", $pos) - $pos; $prevpos = $pos; - $len = index( $config_sh, "=", $pos) - $pos; - $len > 0 ? substr( $config_sh, $pos, $len) : undef; + $len > 0 ? substr($config_sh, $pos, $len) : undef; } -sub EXISTS{ +sub EXISTS { exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; } -sub readonly { die "\%Config::Config is read-only\n" } +sub STORE { die "\%Config::Config is read-only\n" } +sub DELETE { &STORE } +sub CLEAR { &STORE } -sub myconfig { - my($output); - - $output = <<'END'; -Summary of my $package (patchlevel $PATCHLEVEL) configuration: - Platform: - osname=$osname, osver=$osvers, archname=$archname - uname='$myuname' - hint=$hint - Compiler: - cc='$cc', optimize='$optimize' - cppflags='$cppflags' - ccflags ='$ccflags' - ldflags ='$ldflags' - stdchar='$stdchar', d_stdstdio=$d_stdstdio, usevfork=$usevfork - voidflags=$voidflags, castflags=$castflags, d_casti32=$d_casti32, d_castneg=$d_castneg - intsize=$intsize, alignbytes=$alignbytes, usemymalloc=$usemymalloc, randbits=$randbits - Libraries: - so=$so - libpth=$libpth - libs=$libs - libc=$libc - Dynamic Linking: - dlsrc=$dlsrc, dlext=$dlext, d_dlsymun=$d_dlsymun - cccdlflags='$cccdlflags', ccdlflags='$ccdlflags', lddlflags='$lddlflags' - -END - $output =~ s/\$(\w+)/$Config{$1}/ge; - $output; + +sub config_sh { + $config_sh } +sub config_vars { + foreach(@_){ + my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; + $v='undef' unless defined $v; + print "$_='$v';\n"; + } +} + +1; +__END__ -sub STORE { &readonly } -sub DELETE{ &readonly } -sub CLEAR { &readonly } +=head1 NAME -sub config_sh { $config_sh } +Config - access Perl configuration information + +=head1 SYNOPSIS + + use Config; + if ($Config{'cc'} =~ /gcc/) { + print "built by gcc\n"; + } + + use Config qw(myconfig config_sh config_vars); + + print myconfig(); + + print config_sh(); + + config_vars(qw(osname archname)); + + +=head1 DESCRIPTION + +The Config module contains all the information that was available to +the C<Configure> program at Perl build time (over 900 values). + +Shell variables from the F<config.sh> file (written by Configure) are +stored in the readonly-variable C<%Config>, indexed by their names. + +Values stored in config.sh as 'undef' are returned as undefined +values. The perl C<exists> function can be used to check is a +named variable exists. + +=over 4 + +=item myconfig() + +Returns a textual summary of the major perl configuration values. +See also C<-V> in L<perlrun/Switches>. + +=item config_sh() + +Returns the entire perl configuration information in the form of the +original config.sh shell variable assignment script. + +=item config_vars(@names) + +Prints to STDOUT the values of the named configuration variable. Each is +printed on a separate line in the form: + + name='value'; + +Names which are unknown are output as C<name='UNKNOWN';>. +See also C<-V:name> in L<perlrun/Switches>. + +=back + +=head1 EXAMPLE + +Here's a more sophisticated example of using %Config: + + use Config; + + defined $Config{sig_name} || die "No sigs?"; + foreach $name (split(' ', $Config{sig_name})) { + $signo{$name} = $i; + $signame[$i] = $name; + $i++; + } + + print "signal #17 = $signame[17]\n"; + if ($signo{ALRM}) { + print "SIGALRM is $signo{ALRM}\n"; + } + +=head1 WARNING + +Because this information is not stored within the perl executable +itself it is possible (but unlikely) that the information does not +relate to the actual perl binary which is being used to access it. + +The Config module is installed into the architecture and version +specific library directory ($Config{installarchlib}) and it checks the +perl version number when loaded. + +=head1 NOTE + +This module contains a good example of how to use tie to implement a +cache and an example of how to make a tied variable readonly to those +outside of it. + +=cut -1; ENDOFEND close(CONFIG); |