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 ($$) {
38 my ($var_prefix, $target) = @_;
39 return $var_prefix.'TARGETS'.($target eq 'all' ? '' : "_$target");
45 sub close_any_output_file() {
46 return unless defined $writing_output;
47 O->error and die "error writing $writing_output.tmp: $! (?)\n";
48 close O or die "error closing $writing_output.tmp: $!\n";
49 $writing_output = undef;
52 sub start_output_file ($) {
53 close_any_output_file();
54 ($writing_output) = @_;
55 die if $output_files{$writing_output}++;
56 my $tmp = "$writing_output.tmp";
57 open O, ">", $tmp or die "create $tmp: $!\n";
60 sub install_output_files () {
61 close_any_output_file();
62 foreach my $f (sort keys %output_files) {
63 rename "$f.tmp", $f or die "install new $f: $!\n";
68 die unless defined $writing_output;
69 print O @_ or die "error writing $writing_output.tmp: $!\n";
72 sub write_makefile ($$) {
73 my ($dir_prefix,$depth) = @_;
74 start_output_file("${dir_prefix}Makefile");
75 my $cd = $depth ? join('/', ('..',) x $depth) : '.';
79 \$(MAKE) -C $cd ${dir_prefix}$@
83 sub filter_subdir_mk ($$$$$) {
84 my ($dir_prefix, $dir_suffix, $dir_name,
85 $var_prefix, $targets) = @_;
87 my $in = "${srcdir}/${dir_prefix}Subdir.mk.in";
88 open I, '<', $in or die "open $in: $!\n";
89 my $caps_re = qr{[A-Z][0-9_A-Z]*(?=\W)};
90 my $lc_re = qr{[a-z][-+,0-9_a-z]*(?=\W)};
96 unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
98 if ($2) { o $esclit; next; }
99 s{^$esc}{} or die "$_ ?";
100 if (s{^$esc}{}) { o "$esclit$esclit" }
101 elsif (s{^TARGETS(?:_[0-9a-zA-Z_]+)?(?=\W)}{}) {
103 o target_varname($var_prefix, $t);
106 elsif (m{^(?=$caps_re)}) { o "${var_prefix}_" }
107 elsif (m{^(?=$lc_re)}) { o $dir_prefix }
108 elsif (s{^_}{}) { o "${var_prefix}_" }
109 elsif (s{^/}{}) { o $dir_prefix }
110 elsif (s{^=_}{}) { o $var_prefix }
111 elsif (s{^=/}{}) { o $dir_name }
112 elsif (s{^\^}{}) { o "\$(top_srcdir)${dir_suffix}" }
113 elsif (s{^\}}{}) { o "\$(abs_top_srcdir)${dir_suffix}" }
114 elsif (s{^(?:[ \t]+([~^]))?(?=[ \t]){}}{}) {
117 $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
118 $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
121 if (m{([ \t])$esc}) { ($_,$after) = ($`, $1.$'); }
122 s{(?<=[ \t])(?=\S)(?!\\\s*$)}{$prefix}g;
125 } elsif (s{^![ \t]+}{}) {
128 } elsif (s{^!(\pPosixWord+|\pPosixPunct+)[ \t]*}{}) {
133 die "bad escape $esclit$_ ";
139 sub process_subtree ($$);
140 sub process_subtree ($$) {
141 # => list of descendants (in form SUBDIR/)
142 # recursive, children first
145 my $dir_prefix = join '', map { "$_/" } @$path;
146 my $dir_suffix = join '', map { "/$_" } @$path;
147 my $dir_name = join '/', @$path ? @$path : '.';
148 my $var_prefix = map { "${_}_" } @$path ? @$path : qw(TOP);
150 write_makefile($dir_prefix, scalar @$path);
152 my %targets = qw(all 1);
154 foreach my $child (@{ $node->[1] }) {
155 my @childpath = (@$path, $child->[0]);
156 push @child_subdirs, join '/', @childpath;
157 $targets{$_}++ foreach
158 process_subtree($child, [ ]);
160 start_output_file("${dir_prefix}Subdir.mk.tmp");
162 filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
163 $var_prefix, \%targets);
165 my @targets = sort keys %targets;
166 foreach my $target (@targets) {
167 my $target_varname = target_varname($var_prefix, $target);
169 ${dir_prefix}${target}: \$($target_varname)
171 if (@child_subdirs) {
172 print O "${dir_prefix}${target}:";
173 foreach my $child_subdir (@child_subdirs) {
174 print O " $child_subdir/$target";
184 process_subtree($root, [ ]);
185 start_output_file("subdirs.mk");
186 o "include Subdir.mk\n";
187 foreach my $subdir (@subdirs) {
188 o "include $subdir/Subdir.mk";
194 install_output_files();