AC_HELP_STRING and quotes

[Alexandre Duret-Lutz]

Hi!

>>> "Pavel" == Pavel Roskin <address@hidden> writes:

[...]
 Pavel> # m4_unquote(STRING)
 Pavel> # ------------------
 Pavel> # Remove one pair of the quotes if they exist
[...]

This just recall me of a place where I would like quotes not
to be removed...

I'd like to use AC_HELP_STRING to construct lines like

  --enable-foobar[=DIR]   short description here
                 ^    ^

Unfortunately, it appears there are no ways to obtain this
(except not using AC_HELP_STRING).

AC_ARG_ENABLE([foobar],
 [AC_HELP_STRING([--enable-foobar[=DIR]], [short description here])])

would produce

Optional Features:
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --enable-foobar=DIR   short description here

other forms of quoting are even worst

AC_ARG_ENABLE([foobar],
 [AC_HELP_STRING([--enable-foobar[[=DIR]]], [short description here])])
AC_ARG_ENABLE([foobar],
 [AC_HELP_STRING([[--enable-foobar[=DIR]]], [short description here])])
AC_ARG_ENABLE([foobar],
 [AC_HELP_STRING([--enable-foobar@<:@=DIR@:>@], [short description here])])

gives this:

Optional Features:
  --disable-FEATURE       do not include FEATURE (same as--enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --enable-foobar=DIR short description here
  --enable-foobar=DIR short description here
  --enable-foobar[=DIR]   
                          short description here

Any idea?  (of course I need to use AC_HELP_STRING or something
similar, because I call AC_ARG_ENABLE in a function where the
name `foobar' is unknown, i.e., it is an argument).
-- 
Alexandre Duret-Lutz