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Commit	Line	Data
	1	#!./miniperl -w
	2
	3	use strict;
	4
	5	my $osname = $^O;
	6	my $file = 'lib/buildcustomize.pl';
	7
	8	if ( @ARGV % 2 ) {
	9	my $dir = shift;
	10	chdir $dir or die "Can't chdir '$dir': $!";
	11	unshift @INC, 'lib';
	12	}
	13
	14	if ( @ARGV ) {
	15	# Used during cross-compilation.
	16	$osname = $ARGV[1];
	17	}
	18
	19	# To clarify, this isn't the entire suite of modules considered "toolchain"
	20	# It's not even all modules needed to build ext/
	21	# It's just the source paths of the (minimum complete set of) modules in ext/
	22	# needed to build the nonxs modules
	23	# After which, all nonxs modules are in lib, which was always sufficient to
	24	# allow miniperl to build everything else.
	25	# Getopt::Long is here because it's used by podlators, which is one of the
	26	# nonxs modules.
	27	# Term::ReadLine is not here for building but for allowing the debugger to
	28	# run under miniperl when nothing but miniperl will build :-(.
	29	# Text::ParseWords is required in ExtUtils::Liblist::Kid
	30
	31	my @toolchain = qw(cpan/AutoLoader/lib
	32	dist/Carp/lib
	33	dist/PathTools dist/PathTools/lib
	34	cpan/ExtUtils-Install/lib
	35	cpan/ExtUtils-MakeMaker/lib
	36	cpan/ExtUtils-Manifest/lib
	37	cpan/File-Path/lib
	38	ext/re
	39	dist/Term-ReadLine/lib
	40	dist/Exporter/lib
	41	ext/File-Find/lib
	42	cpan/Text-Tabs/lib
	43	dist/constant/lib
	44	cpan/version/lib
	45	cpan/Getopt-Long/lib
	46	cpan/Text-ParseWords/lib
	47	);
	48
	49	# These are for XS building on Win32, since nonxs and xs build simultaneously
	50	# on Win32 if parallel building
	51	push @toolchain, qw(
	52	dist/ExtUtils-ParseXS/lib
	53	cpan/parent/lib
	54	cpan/ExtUtils-Constant/lib
	55	) if $^O eq 'MSWin32';
	56	push @toolchain, 'ext/VMS-Filespec/lib' if $^O eq 'VMS';
	57
	58	unshift @INC, @toolchain;
	59	require File::Spec::Functions;
	60	require Cwd;
	61
	62	my $cwd = Cwd::getcwd();
	63
	64	defined $cwd
	65	or die "$0: Can't determine current working directory\n";
	66
	67	# lib must be last, as the toolchain modules write themselves into it
	68	# as they build, and it's important that @INC order ensures that the partially
	69	# written files are always masked by the complete versions.
	70
	71	my $inc = join ",\n ",
	72	map { "q\0$_\0" }
	73	(map {File::Spec::Functions::rel2abs($_, $cwd)} (
	74	# faster build on the non-parallel Win32 build process
	75	$^O eq 'MSWin32' ? ('lib', @toolchain ) : (@toolchain, 'lib')
	76	));
	77
	78	open my $fh, '>', $file
	79	or die "Can't open $file: $!";
	80
	81	my $error;
	82
	83	# If any of the system's build tools are written in Perl, then this module
	84	# may well be loaded by a much older version than we are building. So keep it
	85	# as backwards compatible as is easy.
	86	print $fh <<"EOT" or $error = "Can't print to $file: $!";
	87	#!perl
	88
	89	# !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
	90	# This file is generated by write_buildcustomize.pl.
	91	# Any changes made here will be lost!
	92
	93	# We are miniperl, building extensions
	94	# Replace the first entry of \@INC ("lib") with the list of
	95	# directories we need.
	96	splice(\@INC, 0, 1, $inc);
	97	\$^O = '$osname';
	98	__END__
	99	EOT
	100
	101	if ($error) {
	102	close $fh
	103	or warn "Can't unlink $file after error: $!";
	104	} else {
	105	if (close $fh) {
	106	do $file and exit;
	107	$error = "Can't load generated $file: $@";
	108	} else {
	109	$error = "Can't close $file: $!";
	110	}
	111	}
	112
	113	# It's going very wrong, so try to remove the botched file.
	114
	115	unlink $file
	116	or warn "Can't unlink $file after error: $!";
	117	die $error;
	118
	119	# ex: set ts=8 sts=4 sw=4 et: