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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	# Term::ReadLine is not here for building but for allowing the debugger to
	26	# run under miniperl when nothing but miniperl will build :-(.
	27
	28	my @toolchain = qw(cpan/AutoLoader/lib
	29	dist/Carp/lib
	30	dist/PathTools dist/PathTools/lib
	31	cpan/ExtUtils-Install/lib
	32	cpan/ExtUtils-MakeMaker/lib
	33	cpan/ExtUtils-Manifest/lib
	34	cpan/File-Path/lib
	35	ext/re
	36	dist/Term-ReadLine/lib
	37	dist/Exporter/lib
	38	ext/File-Find/lib
	39	cpan/Text-Tabs/lib
	40	dist/constant/lib
	41	cpan/version/lib
	42	);
	43
	44	# Text-ParseWords used only in ExtUtils::Liblist::Kid::_win32_ext()
	45	# the rest are for XS building on Win32, since nonxs and xs build simultaneously
	46	# on Win32 if parallel building
	47	push @toolchain, qw(
	48	cpan/Text-ParseWords/lib
	49	dist/ExtUtils-ParseXS/lib
	50	cpan/Getopt-Long/lib
	51	cpan/parent/lib
	52	cpan/ExtUtils-Constant/lib
	53	) if $^O eq 'MSWin32';
	54	push @toolchain, 'ext/VMS-Filespec/lib' if $^O eq 'VMS';
	55
	56	unshift @INC, @toolchain;
	57	require File::Spec::Functions;
	58	require Cwd;
	59
	60	my $cwd = Cwd::getcwd();
	61
	62	# lib must be last, as the toolchain modules write themselves into it
	63	# as they build, and it's important that @INC order ensures that the partially
	64	# written files are always masked by the complete versions.
	65
	66	my $inc = join ",\n ",
	67	map { "q\0$_\0" }
	68	(map {File::Spec::Functions::rel2abs($_, $cwd)} (
	69	# faster build on the non-parallel Win32 build process
	70	$^O eq 'MSWin32' ? ('lib', @toolchain ) : (@toolchain, 'lib')
	71	));
	72
	73	open my $fh, '>', $file
	74	or die "Can't open $file: $!";
	75
	76	my $error;
	77
	78	# If any of the system's build tools are written in Perl, then this module
	79	# may well be loaded by a much older version than we are building. So keep it
	80	# as backwards compatible as is easy.
	81	print $fh <<"EOT" or $error = "Can't print to $file: $!";
	82	#!perl
	83
	84	# !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
	85	# This file is generated by write_buildcustomize.pl.
	86	# Any changes made here will be lost!
	87
	88	# We are miniperl, building extensions
	89	# Replace the first entry of \@INC ("lib") with the list of
	90	# directories we need.
	91	splice(\@INC, 0, 1, $inc);
	92	\$^O = '$osname';
	93	__END__
	94	EOT
	95
	96	if ($error) {
	97	close $fh
	98	or warn "Can't unlink $file after error: $!";
	99	} else {
	100	if (close $fh) {
	101	do $file and exit;
	102	$error = "Can't load generated $file: $@";
	103	} else {
	104	$error = "Can't close $file: $!";
	105	}
	106	}
	107
	108	# It's going very wrong, so try to remove the botched file.
	109
	110	unlink $file
	111	or warn "Can't unlink $file after error: $!";
	112	die $error;
	113
	114	# ex: set ts=8 sts=4 sw=4 et: