[MacPorts] #43148: p5.10-version: tries to modify Perl's version.pm during destroot

[MacPorts]

#43148: p5.10-version: tries to modify Perl's version.pm during destroot
----------------------------+--------------------------------
  Reporter:  mojca@…        |      Owner:  macports-tickets@…
      Type:  defect         |     Status:  closed
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:  fixed          |   Keywords:
      Port:  p5.10-version  |
----------------------------+--------------------------------
Changes (by devans@…):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 The solution is, indeed, contained in bug referenced by Mojca in
 comment:1.

 version.pm was added to perl core in 5.10 which installs it here:
 {{{
 ${prefix}/lib/perl5/5.10.1/version.pm
 }}}

 p5.10-version installs version.pm here:
 {{{
 ${prefix}/lib/perl5/vendor_perl/5.10.1/darwin-thread-multi-
 2level/version.pm
 }}}

 The default behavior of this port (see Makefile.PL) is to unlink the core
 version in favor of its own.  This is applied only for
 perl versions < 5.12. Since perl 5.8 doesn't include version.pm in core,
 this is the reason that only p5.10-version is effected.

 It's not clear to me why, historically, this is the default behavior but
 it is unnecessary since the two versions are installed in
 different paths and due to the structure of @INC, p5-version will always
 override the core version.pm.

 You can use
 {{{
 perl5.10 -Mversion -e'print $_ . " => " . $INC{$_} . "\n" for keys %INC'
 }}}

 both with and without p5.10-version active to prove this.

 In any case, as per the cited bug report, Makefile.PL now includes a check
 for env var PERL_NO_HIGHLANDER which, if present, will disable the attempt
 to unlink the core version of version.pm.

 Fix committed in r122719 which appends PERL_NO_HIGHLANDER to configure.env
 if perl5.major is 5.10.

-- 
Ticket URL: <https://trac.macports.org/ticket/43148#comment:5>
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