use ExtUtils::MakeMaker;
use Config;
# See lib/ExtUtils/MakeMaker.pm for details of how to influence
# the contents of the Makefile that is written.

my %config;
foreach my $arg (@ARGV) {
    my ($k,$v) = split(/=/, $arg, 2);
    $config{$k} = $v;
}

my $hacking = $config{HACKING} ? 'DEFINE += -Wall' : '';

my $perl_path;
if ($config{PERL_PATH}) {
    $perl_path = $config{PERL_PATH};
}
elsif ($^X =~ m|^/|) {
    $perl_path = $^X;
}
else {
    $perl_path = $Config{perlpath};
    $perl_path =~ s|/[^/]*$|/$^X|;
}

print "Checking $perl_path is the same version as this one...";
chomp(my $V = `$perl_path -MConfig -le 'print Config->myconfig'`);
if ($V eq Config->myconfig) {
    print "ok\n";
}
else {
    print "not ok\n";
    print <<EOT;

The perl at $perl_path and the one currently executing this Makefile.PL do
not appear to be the same.

Please specify a full path to a perl interpreter on the command line, e.g:

  perl Makefile.PL PERL_PATH=/usr/bin/perl_custom

EOT
    exit;
}

my $variant = "44BSD";
$variant = "43BSD" if $^O eq 'solaris';

WriteMakefile(
    'NAME'              => 'PPerl',
    'VERSION_FROM'      => 'PPerl.pm', # finds $VERSION
    'EXE_FILES'         => [ qw( pperl ) ],
    'realclean'         => {FILES => 'pperl'},
    ($] >= 5.005 ?    ## Add these new keywords supported since 5.005
      (ABSTRACT_FROM => 'PPerl.pm', # retrieve abstract from module
       AUTHOR     => 'Matt Sergeant, matt@sergeant.org') : ()),
       DEFINE     => "-DVARIANT_$variant -DPERL_INTERP='\"$perl_path\"' -I.",
);


sub MY::postamble {
    "
# just hacking around
$hacking

pperl.h: pperl.h.header PPerl.pm
\t$^X write_pperl_h

main.o: Makefile main.c pperl.h

pperl: main.o pass_fd.o
\t\$(CC) \$(CFLAGS) \$(LDFLAGS) \$(DEFINE) -o pperl main.o pass_fd.o $Config{libs}

pass_fd.c: pass_fd.h

PPerl.xs: pass_fd.c

";
}