.PHONY is specific to Unix make utilities.

And in MMS or MMK on VMS it's a syntax error.  So only spell it
with a dot when not using those utilities to run Devel::PPPort's
Makefile.PL.

Author: craigberry

Porting/Maintainers.pl

@@ -344,6 +344,7 @@ package Maintainers;
         'EXCLUDED'     => [
             'PPPort.pm',    # we use PPPort_pm.PL instead
         ],
+        'CUSTOMIZED'   => [ qw(Makefile.PL) ],
     },
 
     'Devel::SelfStubber' => {

dist/Devel-PPPort/Makefile.PL

@@ -149,11 +149,13 @@ sub configure
 sub MY::postamble
 {
   package MY;
+  use Config;
   my $post = shift->SUPER::postamble(@_);
+  # .PHONY is a syntax error in MMK/MMS
+  my $phony = ($Config{make} =~ m/MM(K|S)/) ? 'PHONY' : '.PHONY';
+  $post .= "\n\n${phony}: purge_all regen_pm regen_xs regen_tests regen_h regen_release_date\n\n";
   $post .= <<'POSTAMBLE';
 
-.PHONY: purge_all regen_pm regen_xs regen_tests regen_h regen_release_date
-
 purge_all: realclean
 	@$(RM_F) PPPort.pm t/*.t
 

t/porting/customized.dat

@@ -2,6 +2,7 @@
 #     cd t
 #     ./perl -I../lib porting/customized.t --regen
 Config::Perl::V cpan/Config-Perl-V/V.pm 0a0f7207e6505b78ee345a933acb0246a13579f5
+Devel::PPPort dist/Devel-PPPort/Makefile.PL c939c8d33d11994c06f546869df63d4518ece797
 Digest cpan/Digest/Digest.pm 43f7f544cb11842b2f55c73e28930da50774e081
 Digest::MD5 cpan/Digest-MD5/Makefile.PL 3bf781444ee671da63f1c6360e0a31f11d9ba520
 Digest::MD5 cpan/Digest-MD5/MD5.pm df5f0663f0f755be7eda6e3d2f008f2629246b19