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

diff --git a/Configure b/Configure
index 56a05f9..374eb39 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -1161,6 +1161,7 @@ nm_so_opt=''
 runnm=''
 usenm=''
 useperlio=''
+initialinstalllocation=''
 userelocatableinc=''
 usesocks=''
 d_oldpthreads=''
@@ -6031,8 +6032,12 @@ eval $setvar
 
 : Default prefix is now "up one level from where the binaries are"
 case "$userelocatableinc" in
-$define|true|[yY]*) prefix=".../.."
-                   prefixexp=".../..";;
+$define|true|[yY]*) initialinstalllocation="$binexp"
+                   bin=".../"
+                   binexp=".../"
+                   prefix=".../.."
+                   prefixexp=".../.."
+                   installprefixexp=".../..";;
 esac
 
 
@@ -22063,6 +22068,7 @@ useopcode='$useopcode'
 useperlio='$useperlio'
 useposix='$useposix'
 usereentrant='$usereentrant'
+initialinstalllocation="$initialinstalllocation"
 userelocatableinc='$userelocatableinc'
 usesfio='$usesfio'
 useshrplib='$useshrplib'

diff --git a/configpm b/configpm
index de4a694..1bd2e38 100755 (executable)
--- a/configpm
+++ b/configpm
@@ -326,7 +326,34 @@ if (fetch_string({},'userelocatableinc')) {
 
                         siteprefixexp
                         sitelib_stem
-                        vendorlib_stem)) {
+                        vendorlib_stem
+
+                        installarchlib
+                        installhtml1dir
+                        installhtml3dir
+                        installman1dir
+                        installman3dir
+                        installprefix
+                        installprefixexp
+                        installprivlib
+                        installscript
+                        installsitearch
+                        installsitebin
+                        installsitehtml1dir
+                        installsitehtml3dir
+                        installsitelib
+                        installsiteman1dir
+                        installsiteman3dir
+                        installsitescript
+                        installvendorarch
+                        installvendorbin
+                        installvendorhtml1dir
+                        installvendorhtml3dir
+                        installvendorlib
+                        installvendorman1dir
+                        installvendorman3dir
+                        installvendorscript
+                        )) {
        push @need_relocation, $what if fetch_string({}, $what) =~ m!^\.\.\./!;
     }
 }

diff --git a/installperl b/installperl
index 2f59f45..919fc64 100755 (executable)
--- 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,