use strict;
+our $srcdir;
+our @subdirs = @ARGV;
+
+die unless $ARGV[0] eq '--srcdir';
+die unless @ARGV>=2;
+shift @ARGV;
+($srcdir, @subdirs) = @ARGV;
+
our $root = [ '.', [ ] ];
# each node is [ 'relative subdir name', \@children ]
sub build_tree () {
- foreach my $subdir (@ARGV) {
+ foreach my $subdir (@subdirs) {
my @path = $subdir eq '.' ? () : split m{/+}, $subdir;
my $node = $root;
foreach my $d (@path) {
}
}
+sub target_varname ($$) {
+ my ($var_prefix, $target) = @_;
+ return $var_prefix.'TARGETS'.($target eq 'all' ? '' : "_$target");
+}
+
+our $writing_output;
+our %output_files;
+
+sub close_any_output_file() {
+ return unless defined $writing_output;
+ O->error and die "error writing $writing_output.tmp: $! (?)\n";
+ close O or die "error closing $writing_output.tmp: $!\n";
+ $writing_output = undef;
+}
+
+sub start_output_file ($) {
+ close_any_output_file();
+ ($writing_output) = @_;
+ die if $output_files{$writing_output}++;
+ my $tmp = "$writing_output.tmp";
+ open O, ">", $tmp or die "create $tmp: $!\n";
+}
+
+sub o {
+ die unless defined $writing_output;
+ print O @_ or die "error writing $writing_output.tmp: $!\n";
+}
+
sub write_makefile ($$) {
- my ($subdir,$depth) = @_;
- start_output_file("$subdir/Makefile");
+ my ($dir_prefix,$depth) = @_;
+ start_output_file("${dir_prefix}Makefile");
my $cd = $depth ? join('/', ('..',) x $depth) : '.';
- o <<END;
+ o sprintf <<'END', $cd, $dir_prefix;
default: all
-%:
- $(MAKE) -C $cd $subdir/$@
+%%:
+ $(MAKE) -C %s %s$@
END
}
-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)};
+sub filter_subdir_mk ($$$$$) {
+ my ($dir_prefix, $dir_suffix, $dir_name,
+ $var_prefix, $targets) = @_;
+
+ 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_e = qr{[a-z][-+,0-9_a-z]*(?=\W)};
my $esclit = '&';
my $esc = '\\&';
+
while (<I>) {
for (;;) {
- s{^(.*?)(?=$esc)}{};
+ unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
o $1;
- last if m{^\n};
+ if ($2) { o $esclit; next; }
s{^$esc}{} or die "$_ ?";
- if (s{^$esc}{}) {
- o $esclit;
+ if (s{^$esc}{}) { o "$esclit$esclit" }
+ elsif (m{^TARGETS(?:_[0-9a-zA-Z_]+)?(?=\W)}{}) {
+ my $t = $2 // 'all';
+ o target_varname($varname_prefix, $t);
+ $targets->{$t}=1;
}
- elsif (m{^(?=$caps_re)}) { o "${for_var}_" }
+ elsif (m{^(?=$caps_re)}) { o "${var_prefix}_" }
elsif (m{^(?=$lc_re)}) { o $dir_prefix }
- elsif (s{^_}{}) { o "${for_var}_" }
+ elsif (s{^_}{}) { o "${var_prefix}_" }
elsif (s{^/}{}) { o $dir_prefix }
- elsif (s{^=_}{}) { o $for_var }
+ 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 (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
+ 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$_ ";
+ }
+ }
}
}
# => 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) : '.';
+
+ my $dir_prefix = join '', map { "$_/" } @$path;
+ my $dir_suffix = join '', map { "/$_" } @$path;
+ my $dir_name = join '/', @$path ? @$path : '.';
+ my $var_prefix = map { "${_}_" } @$path ? @$path : qw(TOP);
+
write_makefile($subdir, scalar @$path);
my %targets = qw(all 1);
}
start_output_file("$subdir/Subdir.mk.tmp");
- filter_subdir_mk();
-
- $targets{$_}++ foreach
- write_subdir($child);
+ filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
+ $var_prefix, \%targets);
my @targets = sort keys %targets;
foreach my $target (@targets) {
- $vsuffix = $target eq 'all' ? '' : "_$target";
+ my $target_varname = target_varname($var_prefix, target);
print O <<END;
-${dprefix}${target}: \$(${vprefix}TARGETS${vsuffix})
+${dprefix}${target}: \$($target_varname)
END
if (@child_subdirs) {
print O "${dprefix}${target}:";
}
}
-
- foreach my $descendant (@descendants) {
- foreach my $target (@$targets) {
- print O <<END;
-END
-
-
-sub process_subdir ($$) {
- my ($subdir) = @_;
- my $depth = $subdir eq '.' ? 0 : scalar split m{/+}, $subdir;
- write_makefile($subdir,$depth);
- filter_subdir_mk();
+ return @targets;
}
+sub process_tree() {
+ process_subtree($root, [ ]);
+ start_output_file("subdirs.mk");
+ o "include Subdir.mk\n";
+ foreach my $subdir (@subdirs) {
+ o "include $subdir/Subdir.mk";
+ }
+}
-
build_tree();
-process_subtree($root, [ ]);
+process_tree();
+install_output_files();