[bug-gettext] not using sub-configure

[Vincent Torri]

Hello

the build system of gettext is using the sub-configure feature of
autoconf, hence the configuration time takes a lot of time (especially
same features are checked several times).

I would like to know if there is some work to port that build system
to only one configure.ac script, and even eventually to a non
recursive build ?

thank you

Vincent Torri