-sub require_subdir ($) {
- # => list of descendant subdirs
- my ($here) = (@_);
- my $prefix = $here eq '.' ? qr{} : qr{$prefix/};
- my @children = grep { m{^$prefix[^/]+$} } @allsubdirs;
- my @descendants;
- foreach my $child (@children) {
- push @descendants, require_subdir(
+sub filter_subdir_mk ($$$$$) {
+ my ($dir_prefix, $dir_suffix, $dir_name,
+ $var_prefix, $targets) = @_;
+
+ #use Data::Dumper;
+ #print STDERR "filter @_\n";
+
+ my $in = "${srcdir}/${dir_prefix}Subdir.mk.in";
+ open I, '<', $in or die "open $in: $!\n";
+ my $caps_re = qr{[A-Z][0-9_A-Z]*(?=\W)};
+ my $lc_re = qr{[a-z][-+,0-9_a-z]*(?=\W)};
+ my $esclit = '&';
+ my $esc = '\\&';
+
+ while (<I>) {
+ for (;;) {
+ unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
+ o $1;
+ if ($2) { o $esclit; next; }
+ s{^$esc}{} or die "$_ ?";
+ if (s{^$esc}{}) { o "$esclit$esclit" }
+ elsif (s{^TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
+ my $t = $1 // 'all';
+ o target_varname($var_prefix, $t);
+ $targets->{$t}=1;
+ }
+ elsif (m{^(?=$caps_re)}) { o $var_prefix }
+ elsif (m{^(?=$lc_re)}) { o $dir_prefix }
+ elsif (s{^_}{}) { o $var_prefix }
+ elsif (s{^/}{}) { o $dir_prefix }
+ elsif (s{^=_}{}) { o $var_prefix }
+ elsif (s{^=/}{}) { o $dir_name }
+ elsif (s{^\^}{}) { o "\$(top_srcdir)${dir_suffix}" }
+ elsif (s{^\}}{}) { o "\$(abs_top_srcdir)${dir_suffix}" }
+ elsif (s{^(?:[ \t]+([~^]))?(?=[ \t])}{}) {
+ my $prefix =
+ !$1 ? $dir_prefix :
+ $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
+ $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
+ die;
+ my $after='';
+ if (m{([ \t])$esc}) { ($_,$after) = ($`, $1.$'); }
+ s{(?<=[ \t])(?=\S)(?!\\\s*$)}{$prefix}g;
+ o $_;
+ $_ = $after;
+ } elsif (s{^![ \t]+}{}) {
+ o $_;
+ $_ = '';
+ } elsif (s{^!(\pPosixWord+|\pPosixPunct+)[ \t]*}{}) {
+ $esclit = $1;
+ $esc = $esclit;
+ $esc =~ s/\W/\\$&/g;
+ } else {
+ die "bad escape $esclit$_ ";
+ }
+ }
+ }
+}
+
+sub process_subtree ($$);
+sub process_subtree ($$) {
+ # => list of descendants (in form SUBDIR/)
+ # recursive, children first
+ my ($node, $path) = @_;