Somewhat less shaky relocatable @INC support. You can install things

to the current location of the perl tree, move it, install more things,
move it again, lather rinse repeat.
Configure with -Duserelocatableinc

p4raw-id: //depot/perl@27491

1 files changed, 25 insertions, 0 deletions

diff --git a/installperl b/installperl
index 2f59f4563a..919fc648bd 100755
--- a/installperl
+++ b/installperl
@@ -7,6 +7,31 @@ BEGIN {
     $ENV{PERL5LIB} = 'lib';
 }
 
+BEGIN {
+    use Config;
+    if ($Config{userelocatableinc}) {
+	# This might be a considered a hack. Need to get information about the
+	# configuration from Config.pm *before* Config.pm expands any .../
+	# prefixes.
+	#
+	# So we set $^X to pretend that we're the already installed perl, so
+	# Config.pm doesits ... expansion off that location.
+
+	my $location = $Config{initialinstalllocation};
+	die <<'OS' unless defined $location;
+$Config{initialinstalllocation} is not defined - can't install a relocatable
+perl without this.
+OS
+	$^X = "$location/perl";
+	# And then remove all trace of ever having loaded Config.pm, so that
+	# it will reload with the revised $^X
+	undef %Config::;
+	delete $INC{"Config.pm"};
+	delete $INC{"Config_heavy.pl"};
+	# You never saw us. We weren't here.
+    }
+}
+
 use strict;
 my ($Is_VMS, $Is_W32, $Is_OS2, $Is_Cygwin, $Is_Darwin,
     $nonono, $dostrip, $versiononly, $silent, $verbose, $force,