add_lic();
flush STDOUT or die $!;
-$!=0; $?=0; system qw(sh -ec), "exec $usvg - -c" and die "exec usvg: $? $!";
-rename "$out.tmp", $out or die $!;
+my $cmd = "$usvg";
+
+open OPTS, "src/USVG_DEFAULT_ARGS.txt" or die $!;
+while (<OPTS>) {
+ s/^\s*$//; s/\s*$//;
+ next unless m/^[^#]/;
+ $cmd .= " '$_'";
+}
+
+$cmd .= " - -c";
+
+my $cmd_m = "$cmd <$in >$out.tmp";
+print STDERR "+ $cmd_m\n";
+
+$!=0; $?=0; system qw(sh -ec), "exec $cmd" and die "exec usvg: $cmd_m: $? $!";
+rename "$out.tmp", $out or die "'$cmd_m': $!";