Is there a way to pass through custom flags?

[Eugene Sandulenko]

Hi gettext devs,

I have a question. We are using Weblate for our translations, which takes .pot/.po files generated by xgettext from our C++ sources.

Weblate supports a number of additional flags which it understands from the .pot file comments.

Is there a way to somehow provide these flags via the C++ source, in a fashion of the `--add-comments` option, but for the flags.

That is, I write something like

  // POTFLAGS: max-length:20, ignore-end-exclamation

  const char *s = _("Hello world! %s");

and xgettext produces

  #: example.cpp:15

  #, max-length:20, ignore-end-exclamation, c-format

  msgid "Hello world! %s"

  msgstr ""

Eugene