package ExtUtils::CBuilder::Platform::VMS;

use strict;
use ExtUtils::CBuilder::Base;

use vars qw($VERSION @ISA);
$VERSION = '0.280209';
@ISA = qw(ExtUtils::CBuilder::Base);

use File::Spec::Functions qw(catfile catdir);
use Config;

# We do prelink, but don't want the parent to redo it.

sub need_prelink { 0 }

sub arg_defines {
my ($self, %args) = @_;

s/"/""/g foreach values %args;

my @config_defines;

# VMS can only have one define qualifier; add the one from config, if any.
if ($self->{config}{ccflags} =~ s{/ def[^=]+ =+ \(? ([^\/\)]*) } {}ix) {
push @config_defines, $1;
}

return '' unless keys(%args) || @config_defines;

return ('/define=('
. join(',',
@config_defines,
map "\"$_" . ( length($args{$_}) ? "=$args{$_}" : '') . "\"",
keys %args)
. ')');
}

sub arg_include_dirs {
my ($self, @dirs) = @_;

# VMS can only have one include list, add the one from config.
if ($self->{config}{ccflags} =~ s{/inc[^=]+(?:=)+(?:\()?([^\/\)]*)} {}i) {
unshift @dirs, $1;
}
return unless @dirs;

return ('/include=(' . join(',', @dirs) . ')');
}

# We override the compile method because we consume the includes and defines
# parts of ccflags in the process of compiling but don't save those parts
# anywhere, so $self->{config}{ccflags} needs to be reset for each compile
# operation.

sub compile {
my ($self, %args) = @_;

$self->{config}{ccflags} = $Config{ccflags};
$self->{config}{ccflags} = $ENV{CFLAGS} if defined $ENV{CFLAGS};

return $self->SUPER::compile(%args);
}

sub _do_link {
my ($self, $type, %args) = @_;

my $objects = delete $args{objects};
$objects = [$objects] unless ref $objects;

if ($args{lddl}) {

# prelink will call Mksymlists, which creates the extension-specific
# linker options file and populates it with the boot symbol.

my @temp_files = $self->prelink(%args, dl_name => $args{module_name});

# We now add the rest of what we need to the linker options file. We
# should replicate the functionality of C<ExtUtils::MM_VMS::dlsyms>,
# but there is as yet no infrastructure for handling object libraries,
# so for now we depend on object files being listed individually on the
# command line, which should work for simple cases. We do bring in our
# own version of C<ExtUtils::Liblist::Kid::ext> so that any additional
# libraries (including PERLSHR) can be added to the options file.

my @optlibs = $self->_liblist_ext( $args{'libs'} );

my $optfile = 'sys$disk:[]' . $temp_files[0];
open my $opt_fh, '>>', $optfile
or die "_do_link: Unable to open $optfile: $!";
for my $lib (@optlibs) {print $opt_fh "$lib\n" if length $lib }
close $opt_fh;

$objects->[-1] .= ',';
push @$objects, $optfile . '/OPTIONS,';

# This one not needed for DEC C, but leave for completeness.
push @$objects, $self->perl_inc() . 'perlshr_attr.opt/OPTIONS';
}

return $self->SUPER::_do_link($type, %args, objects => $objects);
}

sub arg_nolink { return; }

sub arg_object_file {
my ($self, $file) = @_;
return "/obj=$file";
}

sub arg_exec_file {
my ($self, $file) = @_;
return ("/exe=$file");
}

sub arg_share_object_file {
my ($self, $file) = @_;
return ("$self->{config}{lddlflags}=$file");
}


sub lib_file {
my ($self, $dl_file) = @_;
$dl_file =~ s/\.[^.]+$//;
$dl_file =~ tr/"//d;
$dl_file = $dl_file .= '.' . $self->{config}{dlext};

# Need to create with the same name as DynaLoader will load with.
if (defined &DynaLoader::mod2fname) {
my ($dev,$dir,$file) = File::Spec->splitpath($dl_file);
$file = DynaLoader::mod2fname([$file]);
$dl_file = File::Spec->catpath($dev,$dir,$file);
}
return $dl_file;
}

# The following is reproduced almost verbatim from ExtUtils::Liblist::Kid::_vms_ext.
# We can't just call that because it's tied up with the MakeMaker object hierarchy.

sub _liblist_ext {
my($self, $potential_libs,$verbose,$give_libs) = @_;
$verbose ||= 0;

my(@crtls,$crtlstr);
@crtls = ( ($self->{'config'}{'ldflags'} =~ m-/Debug-i ? $self->{'config'}{'dbgprefix'} : '')
. 'PerlShr/Share' );
push(@crtls, grep { not /\(/ } split /\s+/, $self->{'config'}{'perllibs'});
push(@crtls, grep { not /\(/ } split /\s+/, $self->{'config'}{'libc'});
# In general, we pass through the basic libraries from %Config unchanged.
# The one exception is that if we're building in the Perl source tree, and
# a library spec could be resolved via a logical name, we go to some trouble
# to ensure that the copy in the local tree is used, rather than one to
# which a system-wide logical may point.
if ($self->perl_src) {
my($lib,$locspec,$type);
foreach $lib (@crtls) {
if (($locspec,$type) = $lib =~ m{^([\w\$-]+)(/\w+)?} and $locspec =~ /perl/i) {
if (lc $type eq '/share') { $locspec .= $self->{'config'}{'exe_ext'}; }
elsif (lc $type eq '/library') { $locspec .= $self->{'config'}{'lib_ext'}; }
else { $locspec .= $self->{'config'}{'obj_ext'}; }
$locspec = catfile($self->perl_src, $locspec);
$lib = "$locspec$type" if -e $locspec;
}
}
}
$crtlstr = @crtls ? join(' ',@crtls) : '';

unless ($potential_libs) {
warn "Result:\n\tEXTRALIBS: \n\tLDLOADLIBS: $crtlstr\n" if $verbose;
return ('', '', $crtlstr, '', ($give_libs ? [] : ()));
}

my(@dirs,@libs,$dir,$lib,%found,@fndlibs,$ldlib);
my $cwd = cwd();
my($so,$lib_ext,$obj_ext) = @{$self->{'config'}}{'so','lib_ext','obj_ext'};
# List of common Unix library names and their VMS equivalents
# (VMS equivalent of '' indicates that the library is automatically
# searched by the linker, and should be skipped here.)
my(@flibs, %libs_seen);
my %libmap = ( 'm' => '', 'f77' => '', 'F77' => '', 'V77' => '', 'c' => '',
'malloc' => '', 'crypt' => '', 'resolv' => '', 'c_s' => '',
'socket' => '', 'X11' => 'DECW$XLIBSHR',
'Xt' => 'DECW$XTSHR', 'Xm' => 'DECW$XMLIBSHR',
'Xmu' => 'DECW$XMULIBSHR');
if ($self->{'config'}{'vms_cc_type'} ne 'decc') { $libmap{'curses'} = 'VAXCCURSE'; }

warn "Potential libraries are '$potential_libs'\n" if $verbose;

# First, sort out directories and library names in the input
foreach $lib (split ' ',$potential_libs) {
push(@dirs,$1), next if $lib =~ /^-L(.*)/;
push(@dirs,$lib), next if $lib =~ /[:>\]]$/;
push(@dirs,$lib), next if -d $lib;
push(@libs,$1), next if $lib =~ /^-l(.*)/;
push(@libs,$lib);
}
push(@dirs,split(' ',$self->{'config'}{'libpth'}));

# Now make sure we've got VMS-syntax absolute directory specs
# (We don't, however, check whether someone's hidden a relative
# path in a logical name.)
foreach $dir (@dirs) {
unless (-d $dir) {
warn "Skipping nonexistent Directory $dir\n" if $verbose > 1;
$dir = '';
next;
}
warn "Resolving directory $dir\n" if $verbose;
if (!File::Spec->file_name_is_absolute($dir)) {
$dir = catdir($cwd,$dir);
}
}
@dirs = grep { length($_) } @dirs;
unshift(@dirs,''); # Check each $lib without additions first

LIB: foreach $lib (@libs) {
if (exists $libmap{$lib}) {
next unless length $libmap{$lib};
$lib = $libmap{$lib};
}

my(@variants,$variant,$cand);
my($ctype) = '';

# If we don't have a file type, consider it a possibly abbreviated name and
# check for common variants. We try these first to grab libraries before
# a like-named executable image (e.g. -lperl resolves to perlshr.exe
# before perl.exe).
if ($lib !~ /\.[^:>\]]*$/) {
push(@variants,"${lib}shr","${lib}rtl","${lib}lib");
push(@variants,"lib$lib") if $lib !~ /[:>\]]/;
}
push(@variants,$lib);
warn "Looking for $lib\n" if $verbose;
foreach $variant (@variants) {
my($fullname, $name);

foreach $dir (@dirs) {
my($type);

$name = "$dir$variant";
warn "\tChecking $name\n" if $verbose > 2;
$fullname = VMS::Filespec::rmsexpand($name);
if (defined $fullname and -f $fullname) {
# It's got its own suffix, so we'll have to figure out the type
if ($fullname =~ /(?:$so|exe)$/i) { $type = 'SHR'; }
elsif ($fullname =~ /(?:$lib_ext|olb)$/i) { $type = 'OLB'; }
elsif ($fullname =~ /(?:$obj_ext|obj)$/i) {
warn "Note (probably harmless): "
."Plain object file $fullname found in library list\n";
$type = 'OBJ';
}
else {
warn "Note (probably harmless): "
."Unknown library type for $fullname; assuming shared\n";
$type = 'SHR';
}
}
elsif (-f ($fullname = VMS::Filespec::rmsexpand($name,$so)) or
-f ($fullname = VMS::Filespec::rmsexpand($name,'.exe'))) {
$type = 'SHR';
$name = $fullname unless $fullname =~ /exe;?\d*$/i;
}
elsif (not length($ctype) and # If we've got a lib already,
# don't bother
( -f ($fullname = VMS::Filespec::rmsexpand($name,$lib_ext)) or
-f ($fullname = VMS::Filespec::rmsexpand($name,'.olb')))) {
$type = 'OLB';
$name = $fullname unless $fullname =~ /olb;?\d*$/i;
}
elsif (not length($ctype) and # If we've got a lib already,
# don't bother
( -f ($fullname = VMS::Filespec::rmsexpand($name,$obj_ext)) or
-f ($fullname = VMS::Filespec::rmsexpand($name,'.obj')))) {
warn "Note (probably harmless): "
."Plain object file $fullname found in library list\n";
$type = 'OBJ';
$name = $fullname unless $fullname =~ /obj;?\d*$/i;
}
if (defined $type) {
$ctype = $type; $cand = $name;
last if $ctype eq 'SHR';
}
}
if ($ctype) {
# This has to precede any other CRTLs, so just make it first
if ($cand eq 'VAXCCURSE') { unshift @{$found{$ctype}}, $cand; }
else { push @{$found{$ctype}}, $cand; }
warn "\tFound as $cand (really $fullname), type $ctype\n"
if $verbose > 1;
push @flibs, $name unless $libs_seen{$fullname}++;
next LIB;
}
}
warn "Note (probably harmless): "
."No library found for $lib\n";
}

push @fndlibs, @{$found{OBJ}} if exists $found{OBJ};
push @fndlibs, map { "$_/Library" } @{$found{OLB}} if exists $found{OLB};
push @fndlibs, map { "$_/Share" } @{$found{SHR}} if exists $found{SHR};
$lib = join(' ',@fndlibs);

$ldlib = $crtlstr ? "$lib $crtlstr" : $lib;
warn "Result:\n\tEXTRALIBS: $lib\n\tLDLOADLIBS: $ldlib\n" if $verbose;
wantarray ? ($lib, '', $ldlib, '', ($give_libs ? \@flibs : ())) : $lib;
}

1;