+sub filter_subdir_mk ($) {
+ my ($subdir) = @_;
+ my $in = "$srcdir/$subdir/Subdir.mk.in";
+ open I, '<' $in or die "open $in: $!\n";
+ my $caps_re = qr{[A-Z][0-9_A-Z]*(?!\w)};
+ my $lc_e = qr{[a-z][-+,0-9_a-z]*(?!\w)};
+ my $esclit = '&';
+ my $esc = '\\&';
+ while (<I>) {
+ for (;;) {
+ s{^(.*?)(?=$esc)}{};
+ o $1;
+ last if m{^\n};
+ s{^$esc}{} or die "$_ ?";
+ if (s{^$esc}{}) {
+ o $esclit;
+ }
+ elsif (m{^(?=$caps_re)}) { o "${for_var}_" }
+ elsif (m{^(?=$lc_re)}) { o $dir_prefix }
+ elsif (s{^_}{}) { o "${for_var}_" }
+ elsif (s{^/}{}) { o $dir_prefix }
+ elsif (s{^=_}{}) { o $for_var }
+ elsif (s{^=/}{}) { o $dir_name }
+ elsif (s{^\^}{}) { o "\$(top_srcdir)${dir_suffix}" }
+ elsif (s{^\}}{}) { o "\$(abs_top_srcdir)${dir_suffix}" }
+ elsif (m{^[ \t]}) {
+ for (;;) {
+ if (s{^[ \t]+($caps_re)}{}) {
+ o "
+
+ s{^
+ } else
+ }
+ s{^~}{$dir_name} ||
+
+
+[A-Z][0-9A-Z_](?!\w
+(=?)([/.~])}{}) {
+ my ($val,
+ o $subdir;
+ } elsif (s{^[_/]}{}) {
+ o
+ }
+}
+
+sub process_subtree ($$) {
+ # => list of descendants (in form SUBDIR/)
+ # recursive, children first
+ my ($node, $path);
+ my $dprefix = join '', map { "${_}/" } @$path;
+ my $vprefix = join '', map { "${_}_" } @$path;
+ my $subdir = @$path ? (join '/', @$path) : '.';
+ write_makefile($subdir, scalar @$path);
+
+ my %targets = qw(all 1);
+ my @child_subdirs;
+ foreach my $child (@{ $node->[1] }) {
+ my @childpath = (@$path, $child->[0]);
+ push @child_subdirs, join '/', @childpath;
+ $targets{$_}++ foreach
+ process_subtree($child, [ ]);
+ }
+ start_output_file("$subdir/Subdir.mk.tmp");
+
+ filter_subdir_mk();
+
+ $targets{$_}++ foreach
+ write_subdir($child);
+
+ my @targets = sort keys %targets;
+ foreach my $target (@targets) {
+ $vsuffix = $target eq 'all' ? '' : "_$target";
+ print O <<END;
+${dprefix}${target}: \$(${vprefix}TARGETS${vsuffix})
+END
+ if (@child_subdirs) {
+ print O "${dprefix}${target}:";
+ foreach my $child_subdir (@child_subdirs) {
+ print O " $child_subdir/$target";
+ }
+ print O "\n";
+ }
+ }
+
+
+ foreach my $descendant (@descendants) {
+ foreach my $target (@$targets) {
+ print O <<END;
+END
+
+