3 # $(srcdir)/build-aux/subdirmk-setup SUBDIR...
14 die unless $ARGV[0] eq '--srcdir';
17 ($srcdir, @subdirs) = @ARGV;
19 our $root = [ '.', [ ] ];
20 # each node is [ 'relative subdir name', \@children ]
23 foreach my $subdir (@subdirs) {
24 my @path = $subdir eq '.' ? () : split m{/+}, $subdir;
26 foreach my $d (@path) {
27 my ($c,) = grep { $_->[0] eq $d } @{ $node->[1] };
30 push @{ $node->[1] }, $c;
37 sub target_varname ($$) {
38 my ($var_prefix, $target) = @_;
39 return $var_prefix.'TARGETS'.($target eq 'all' ? '' : "_$target");
45 sub close_any_output_file() {
46 return unless defined $writing_output;
47 O->error and die "error writing $writing_output.tmp: $! (?)\n";
48 close O or die "error closing $writing_output.tmp: $!\n";
49 $writing_output = undef;
52 sub start_output_file ($) {
53 close_any_output_file();
54 ($writing_output) = @_;
55 die if $output_files{$writing_output}++;
56 my $tmp = "$writing_output.tmp";
57 open O, ">", $tmp or die "create $tmp: $!\n";
61 die unless defined $writing_output;
62 print O @_ or die "error writing $writing_output.tmp: $!\n";
65 sub write_makefile ($$) {
66 my ($dir_prefix,$depth) = @_;
67 start_output_file("${dir_prefix}Makefile");
68 my $cd = $depth ? join('/', ('..',) x $depth) : '.';
72 \$(MAKE) -C $cd ${dir_prefix}$@
76 sub filter_subdir_mk ($$$$$) {
77 my ($dir_prefix, $dir_suffix, $dir_name,
78 $var_prefix, $targets) = @_;
80 my $in = "${srcdir}/${dir_prefix}Subdir.mk.in";
81 open I, '<', $in or die "open $in: $!\n";
82 my $caps_re = qr{[A-Z][0-9_A-Z]*(?=\W)};
83 my $lc_e = qr{[a-z][-+,0-9_a-z]*(?=\W)};
89 unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
91 if ($2) { o $esclit; next; }
92 s{^$esc}{} or die "$_ ?";
93 if (s{^$esc}{}) { o "$esclit$esclit" }
94 elsif (m{^TARGETS(?:_[0-9a-zA-Z_]+)?(?=\W)}{}) {
96 o target_varname($varname_prefix, $t);
99 elsif (m{^(?=$caps_re)}) { o "${var_prefix}_" }
100 elsif (m{^(?=$lc_re)}) { o $dir_prefix }
101 elsif (s{^_}{}) { o "${var_prefix}_" }
102 elsif (s{^/}{}) { o $dir_prefix }
103 elsif (s{^=_}{}) { o $var_prefix }
104 elsif (s{^=/}{}) { o $dir_name }
105 elsif (s{^\^}{}) { o "\$(top_srcdir)${dir_suffix}" }
106 elsif (s{^\}}{}) { o "\$(abs_top_srcdir)${dir_suffix}" }
107 elsif (s{^(?:[ \t]+([~^]))?(?=[ \t]){}}{}) {
110 $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
111 $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
114 if (m{([ \t])$esc}) { ($_,$after) = ($`, $1.$'); }
115 s{(?<=[ \t])(?=\S)(?!\\\s*$)}{$prefix}g;
118 } elsif (s{^![ \t]+}{}) {
121 } elsif (s{^!(\pPosixWord+|\pPosixPunct+)[ \t]*}{}) {
126 die "bad escape $esclit$_ ";
132 sub process_subtree ($$) {
133 # => list of descendants (in form SUBDIR/)
134 # recursive, children first
137 my $dir_prefix = join '', map { "$_/" } @$path;
138 my $dir_suffix = join '', map { "/$_" } @$path;
139 my $dir_name = join '/', @$path ? @$path : '.';
140 my $var_prefix = map { "${_}_" } @$path ? @$path : qw(TOP);
142 write_makefile($subdir, scalar @$path);
144 my %targets = qw(all 1);
146 foreach my $child (@{ $node->[1] }) {
147 my @childpath = (@$path, $child->[0]);
148 push @child_subdirs, join '/', @childpath;
149 $targets{$_}++ foreach
150 process_subtree($child, [ ]);
152 start_output_file("$subdir/Subdir.mk.tmp");
154 filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
155 $var_prefix, \%targets);
157 my @targets = sort keys %targets;
158 foreach my $target (@targets) {
159 my $target_varname = target_varname($var_prefix, target);
161 ${dprefix}${target}: \$($target_varname)
163 if (@child_subdirs) {
164 print O "${dprefix}${target}:";
165 foreach my $child_subdir (@child_subdirs) {
166 print O " $child_subdir/$target";
176 process_subtree($root, [ ]);
177 start_output_file("subdirs.mk");
178 o "include Subdir.mk\n";
179 foreach my $subdir (@subdirs) {
180 o "include $subdir/Subdir.mk";
186 install_output_files();