I was right, you don't need to run it twice :)

http://search.cpan.org/dist/PAR-Packer/MANIFEST http://cpansearch.perl.org/src/RSCHUPP/PAR-Packer-1.013/myldr/Makefile.PL redefines CFLAGS (and friends) in postamble, after MakeMaker has expanded all the stuff ( LINKTYPE and everything ) 

$ h2xs -AX -n Bunk
...

sub MY::postamble {
    use Data::Dump();
    warn join "\n",
    Data::Dump::pp(@_),
    "postamble @_ ",
    Data::Dump::pp(
        $_[0]->{ARGS},
        $_[0]->{LINKTYPE}
    );
    
    ""
}

...
$ perl Bunk/Makefile.PL
...
postamble PACK001=HASH(0xa556a4)
(
  {
    ABSTRACT_FROM => "lib/Bunk.pm",
    AUTHOR => ["A. U. Thor <a.u.thor\@a.galaxy.far.far.away>"],
    NAME => "Bunk",
    PREREQ_PM => {},
    VERSION_FROM => "lib/Bunk.pm",
  },
  "dynamic",
) at Bunk\Makefile.PL line 15.
Writing Makefile for Bunk
Writing MYMETA.yml and MYMETA.json


$ perl Bunk/Makefile.PL LINKTYPE=static
...
postamble PACK001=HASH(0xa556c4)
(
  {
    ABSTRACT_FROM => "lib/Bunk.pm",
    AUTHOR => ["A. U. Thor <a.u.thor\@a.galaxy.far.far.away>"],
    LINKTYPE => "static",
    NAME => "Bunk",
    PREREQ_PM => {},
    VERSION_FROM => "lib/Bunk.pm",
  },
  "static",
) at Bunk\Makefile.PL line 15.
Writing Makefile for Bunk
Writing MYMETA.yml and MYMETA.json

[download]

The PACK001=HASH(0xa556c4) gives a hint as to why calling WriteMakefile twice doesn't work -- MakeMaker is eeeew

:) MakeMaker Is DOOMED! but Module::Build doesn't support static linking

In reply to Re^3: 2nd run of WriteMakefile ignores MY overloads by Anonymous Monk
in thread 2nd run of WriteMakefile ignores MY overloads by bulk88

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