new perldelta

[perl5.git] / write_buildcustomize.pl

diff --git a/write_buildcustomize.pl b/write_buildcustomize.pl
index 0508e27..9a784fe 100644 (file)
--- a/write_buildcustomize.pl
+++ b/write_buildcustomize.pl
@@ -1,14 +1,20 @@
 #!./miniperl -w
 
 use strict;
 #!./miniperl -w
 
 use strict;

-if (@ARGV) {
+
+my $osname = $^O;
+my $file = 'lib/buildcustomize.pl';
+
+if ( @ARGV % 2 ) {

     my $dir = shift;
     chdir $dir or die "Can't chdir '$dir': $!";
     unshift @INC, 'lib';
 }
 
     my $dir = shift;
     chdir $dir or die "Can't chdir '$dir': $!";
     unshift @INC, 'lib';
 }
 

-unshift @INC, ('dist/Cwd', 'dist/Cwd/lib');
-require File::Spec::Functions;
+if ( @ARGV ) {
+    # Used during cross-compilation.
+    $osname = $ARGV[1];
+}

 
 # To clarify, this isn't the entire suite of modules considered "toolchain"
 # It's not even all modules needed to build ext/
 
 # To clarify, this isn't the entire suite of modules considered "toolchain"
 # It's not even all modules needed to build ext/


@@ -16,36 +22,100 @@ require File::Spec::Functions;
 # needed to build the nonxs modules
 # After which, all nonxs modules are in lib, which was always sufficient to
 # allow miniperl to build everything else.
 # needed to build the nonxs modules
 # After which, all nonxs modules are in lib, which was always sufficient to
 # allow miniperl to build everything else.

+# Getopt::Long is here because it's used by podlators, which is one of the
+# nonxs modules.
+# Term::ReadLine is not here for building but for allowing the debugger to
+# run under miniperl when nothing but miniperl will build :-(.
+# Text::ParseWords is required in ExtUtils::Liblist::Kid

 
 my @toolchain = qw(cpan/AutoLoader/lib
 
 my @toolchain = qw(cpan/AutoLoader/lib

-                  dist/Cwd dist/Cwd/lib
-                  dist/ExtUtils-Command/lib
-                  dist/ExtUtils-Install/lib
+                  dist/Carp/lib
+                  dist/PathTools dist/PathTools/lib
+                  cpan/ExtUtils-Install/lib

                   cpan/ExtUtils-MakeMaker/lib
                   cpan/ExtUtils-MakeMaker/lib

-                  dist/ExtUtils-Manifest/lib
+                  cpan/ExtUtils-Manifest/lib

                   cpan/File-Path/lib
                   ext/re
                   cpan/File-Path/lib
                   ext/re

+                  dist/Term-ReadLine/lib
+                   dist/Exporter/lib
+                   ext/File-Find/lib
+                   cpan/Text-Tabs/lib
+                  dist/constant/lib
+                  cpan/version/lib
+                  cpan/Getopt-Long/lib
+                  cpan/Text-ParseWords/lib
+                   cpan/ExtUtils-PL2Bat/lib

                   );
 
                   );
 

-# Used only in ExtUtils::Liblist::Kid::_win32_ext()
-push @toolchain, 'cpan/Text-ParseWords/lib' if $^O eq 'MSWin32';
+# These are for XS building on Win32, since nonxs and xs build simultaneously
+# on Win32 if parallel building
+push @toolchain, qw(
+       dist/ExtUtils-ParseXS/lib
+       cpan/parent/lib
+       cpan/ExtUtils-Constant/lib
+    dist/base/lib
+) if $^O eq 'MSWin32';
+push @toolchain, 'ext/VMS-Filespec/lib' if $^O eq 'VMS';
+
+unshift @INC, @toolchain;
+require File::Spec::Functions;
+require Cwd;
+
+my $cwd  = Cwd::getcwd();
+
+defined $cwd
+  or die "$0: Can't determine current working directory\n";

 
 

-# lib must be last, as the the toolchain modules write themselves into it
+# lib must be last, as the toolchain modules write themselves into it

 # as they build, and it's important that @INC order ensures that the partially
 # written files are always masked by the complete versions.
 
 my $inc = join ",\n        ",
     map { "q\0$_\0" }
 # as they build, and it's important that @INC order ensures that the partially
 # written files are always masked by the complete versions.
 
 my $inc = join ",\n        ",
     map { "q\0$_\0" }

-    (map {File::Spec::Functions::rel2abs($_)} @toolchain, 'lib'), '.';
+    (map {File::Spec::Functions::rel2abs($_, $cwd)} (
+# faster build on the non-parallel Win32 build process
+        $^O eq 'MSWin32' ? ('lib', @toolchain ) : (@toolchain, 'lib')
+    ));
+
+open my $fh, '>', $file
+    or die "Can't open $file: $!";
+
+my $error;

 
 # If any of the system's build tools are written in Perl, then this module
 # may well be loaded by a much older version than we are building. So keep it
 # as backwards compatible as is easy.
 
 # If any of the system's build tools are written in Perl, then this module
 # may well be loaded by a much older version than we are building. So keep it
 # as backwards compatible as is easy.

-print <<"EOT";
+print $fh <<"EOT" or $error = "Can't print to $file: $!";

 #!perl
 
 #!perl
 

+#   !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
+#   This file is generated by write_buildcustomize.pl.
+#   Any changes made here will be lost!
+

 # We are miniperl, building extensions
 # We are miniperl, building extensions

-# Reset \@INC completely, adding the directories we need, and removing the
-# installed directories (which we don't need to read, and may confuse us)
-\@INC = ($inc);
+# Replace the first entry of \@INC ("lib") with the list of
+# directories we need.
+splice(\@INC, 0, 1, $inc);
+\$^O = '$osname';
+__END__

 EOT
 EOT

+
+if ($error) {
+    close $fh
+        or warn "Can't unlink $file after error: $!";
+} else {
+    if (close $fh) {
+        do $file and exit;
+        $error = "Can't load generated $file: $@";
+    } else {
+        $error = "Can't close $file: $!";
+    }
+}
+
+# It's going very wrong, so try to remove the botched file.
+
+unlink $file
+    or warn "Can't unlink $file after error: $!";
+die $error;
+
+# ex: set ts=8 sts=4 sw=4 et: