Re: WITHOUT_BZIP2?

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> On Mar 29, 2026, at 9:34=E2=80=AFAM, Dag-Erling Sm=C3=B8rgrav =
<[email protected]> wrote:
>=20
> Daniel Engberg <[email protected]> writes:
>> Lexi Winter <[email protected]> writes:
>>> src.conf(5) documents the WITHOUT_BZIP2 knob.   however, unless i'm
>>> missing something, this knob doesn't actually do anything, i.e. it
>>> has no effect on the built system.
>>>=20
>>> we could fix this in two ways:
>>>=20
>>> - actually implement the option, to not build bzip2(1), libz2, etc.
>>>=20
>>> - remove the option.
>>>=20
>>> i am inclined towards the second option, since no one has complained
>>> about the option not working, and therefore almost certainly isn't
>>> using it.
>> Hi, Having pola in mind and the practical impact I think it's safe to
>> assume that you don't need to implement a functional variant if it is
>> broken, just remove it.  If libarchive (bsdtar) had native builtin
>> support perhaps it would be worth considering implement it and/or
>> removing the library itself (and move it to a package repo) but that
>> doesn't seem to be the case at least not as of writing.
>=20
> Libarchive has had native support for bzip2 compression since at least
> 2012.  That, however, is only tangentially related to the BZIP2 =
option.
>=20
> We have two build options related to bzip2:
>=20
> 1) The BZIP2_SUPPORT option is supposed to enable / disable support =
for
>   the bzip2 algorithm / file format in various utilities such as tar,
>   zcat etc.  It currently only affects zcat (usr.bin/gzip).  It =
should,
>   but does not, also cover libarchive and its consumers, and control
>   whether libbz2 is built.
>=20
> 2) The BZIP2 option is supposed to control whether bzip2, bunzip2, and
>   bzip2recover are built, but does not.
>=20
> We should probably drop both options outright, since we've never
> provided corresponding options for gzip, xz / lzma, or zstd.

	If there was a way to build bootloaders without bzip2 support, =
that could save boot loader blocks for other things. That=E2=80=99s one =
case I can think of where it makes sense making the support work as =
desired.
Thanks!
-Enji


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