Re: terminfo entries over 4096 bytes and non-default build configurations

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On Mon, Jul 20, 2026 at 06:05:40PM +0200, Sven Joachim wrote:
> When building with --disable-widec or --with-abi-version=3D5, the size of
> terminfo entries is limited to 4096 bytes (MAX_ENTRY_SIZE in
> include/tic.h).  Since popular entries like xterm or xterm-256color are
> now larger than that limit, problems arise:
>=20
> - When installing the terminfo database from such a build, these entries
>   are missing (tic reports that they are larger than 4096 bytes, so the
>   builder might at least notice that they are skipped).
>=20
> - The libraries cannot open such an entry, for instance newterm() fails
>   with a "cannot initialize terminal type" error message.
>=20
> Note that the second problem does not ensue if libncurses.so.6 and
> libncursesw.so.6 share a common libtinfo.so.6 from the wide build, as is
> the case in Debian and Fedora.
>=20
> Can the limit be increased to 32768 in all configurations?  After all,

maybe (it would be a simple solution -- the alternative seems to be to
omit part or all of the extended capabilities, which also is simple).

> compatibility with current terminfo entries seems to be more important
> than compatibility with SVr2.
>=20
> Cheers,
>        Sven
>=20
>=20

--=20
Thomas E. Dickey <[email protected]>
https://invisible-island.net

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