END
}
+our %varref;
+
our ($dir_prefix, $dir_suffix, $dir_name,
$var_prefix, $var_prefix_name);
die "subdirmk: ${err_file}:$.: $m\n";
}
+sub wrn ($) {
+ my ($m) = @_;
+ print STDERR "subdirmk: warning: ${err_file}:$.: $m\n";
+}
+
sub ddbl_only ($) {
my ($e) = @_;
return if $ddbl;
local $ddbl;
my @nest = (['']);
+ my $evalcall_brackets;
my $push_nest = sub {
my ($nk, $nndbl, $what) = @_;
$ddbl = (shift @nest)[1];
};
+ # Our detection of variable settings does not have to be completely
+ # accurate, since it is only going to be used for advice to the user.
+ my $note_varref = sub {
+ my ($vn,$amp) = @_;
+ $varref{$vn}{$amp}{"$f:$."} = 1;
+ };
+
while (<$input>) {
+ if (m#^\s*($esc)?(\w+)\s*(?:=|\+=|\?=|:=)# ||
+ m#^\s*(?:$esc\:macro|define)\s+($esc)?(\S+)\s#) {
+ $note_varref->($2,!!$1);
+ }
if (s#^\s*$esc\:changequote\s+(\S+)\s+$##) {
$$esclitr = $1;
$set_esc->();
err "unknown directive &:$1 or bad argumnt syntax";
} elsif (s{^\s*${esc}TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
my $t = $1 // 'all';
- od target_varname($var_prefix, $t);
+ my $vn = target_varname($var_prefix, $t);
+ $note_varref->($vn,1);
+ od $vn;
$targets->{$t} //= [ ];
}
for (;;) {
err 'cannot $-double &-processed RHS of directive'
if $ddbl && defined $buffering_output;
unless ($nest[0][0] eq 'eval'
- ? s{^(.*?)($esc|[{}])}{}
- : s{^(.*?)($esc)}{}) { od $_; last; }
+ ? s{^(.*?)($esc|\$|[{}])}{}
+ : s{^(.*?)($esc|\$)}{}) { od $_; last; }
od $1;
if ($2 eq '{') {
- $ddbl++;
+ od $2;
+ $evalcall_brackets++;
next;
} elsif ($2 eq '}') {
- next if --$ddbl;
+ od $2;
+ next if --$evalcall_brackets;
$pop_nest->('eval');
- od '}}';
+ od '}';
+ next;
+ } elsif ($2 eq '$') {
+ od $2;
+ if (s{^\$}{}) { od $&; }
+ elsif (m{^[a-zA-Z]\w}) {
+ wrn
+ 'possibly confusing unbracketed single-char $-expansion';
+ }
+ elsif (m{^\(($esc)?([^()\$]+)\)} ||
+ m{^\{($esc)?([^{}\$]+)\}}) {
+ $note_varref->($2,!!$1);
+ }
next;
}
if (s{^\\$esc}{}) { od "$$esclitr" }
elsif (s{^\\\s+$}{}) { }
elsif (s{^$esc}{}) { od "$$esclitr$$esclitr" }
elsif (m{^(?=$caps_re)}) { od $var_prefix }
- elsif (s{^\$([A-Za-z]\w+)}{}) { od "\$(${var_prefix}$1)" }
+ elsif (s{^\$([A-Za-z]\w+)}{}) {
+ $note_varref->($1,1);
+ od "\$(${var_prefix}$1)";
+ }
elsif (s{^([~^]?)(?=$lc_re)}{}) { od $pfxmap{$1} }
elsif (s{^_}{}) { od $var_prefix }
elsif (s{^=}{}) { od $var_prefix_name }
elsif (s{^([~^])\.}{}) { od $srcdirmap{$1} }
elsif (s{^\$\-}{}) { $ddbl=undef; }
elsif (s{^\$\+}{}) { $ddbl=1; }
- elsif (s{^\$\(}{}) { ddbl_only($&); oud "\$("; }
+ elsif (s{^\$\(}{}) {
+ ddbl_only($&); oud "\$(";
+ $note_varref->($2,!!$1) if m{^($esc)?([^()\$]+\))};
+ }
elsif (s{^\$(\d+)}{}) { ddbl_only($&); oud "\$($1)"; }
elsif (s{^\$\{}{}) {
err 'macro invocation cannot be re-$-doubled' if $ddbl;
od '${eval ${call ';
+ $evalcall_brackets = 1;
$push_nest->('eval',1, '&${...}');
+ $note_varref->($2,!!$1) if m{^\s*($esc)?([^,{}\$]+)};
} elsif (s{^([~^]?)(?=[ \t])}{}) {
my $prefix = $pfxmap{$1} // die "internal error ($1?)";
my $after='';
oraw "include \$(SUBDIRMK_MAKEFILES)\n";
}
+sub print_varref_warnings () {
+ foreach my $vn (sort keys %varref) {
+ my $vv = $varref{$vn};
+ next unless $vv->{''} && $vv->{1};
+ print STDERR "subdirmk: warning: saw both $vn and &$vn\n";
+ foreach my $amp ('', 1) {
+ printf STDERR " saw %s%s at %s\n",
+ ($amp ? '&' : ''), $vn, $_
+ foreach sort keys %{ $vv->{$amp} };
+ }
+ }
+}
+
build_tree();
process_tree();
+print_varref_warnings();
install_output_files();