- my $prefix = $has_context ? 'pTHX_' : '';
- my $args = scalar @args;
- push @attrs, sprintf "__attribute__format__(__printf__,%s%d,%s%d)",
- $prefix, $args - 1, $prefix, $args;
+ my $prefix = $has_context ? 'pTHX_' : '';
+ my $args = scalar @args;
+ my $pat = $args - 1;
+ my $macro = @nonnull && $nonnull[-1] == $pat
+ ? '__attribute__format__'
+ : '__attribute__format__null_ok__';
+ push @attrs, sprintf "%s(__printf__,%s%d,%s%d)", $macro,
+ $prefix, $pat, $prefix, $args;