[sane-devel] mystery why sane-backend umax_pp always builds

[Ralph Little]

Hi,

On 2022-07-21 12:19, r. a. schmied wrote:
> saners
>
> the missing '/' on line ending umax
> (see rcsdiff -uBitwb configure.ac below)
> might be why the umax_pp always
> builds even with an envvar like
> export BACKENDS='genesys net test'
> passed to configure.
>
> yet to determine 1) why the backends
> umax1220u v4l xerox_mfp p5
> *do not get* built along with umax_pp and
> 2) if the added '/' will have any actual effect.
>
> i doubt this will have desired effect, as the
> Makefile(s) do have 'BACKENDS =  genesys net test'
> and do not have umax_pp (or any other backend)
> in any obviously related envvar/macro.
>
> same missing '/' and build situation exists for
> sane-backends-1.0.32.86-911be
> and
> sane-backends-1.0.28
>
>
> ras
>
> --- configure.ac    2022/07/21 17:45:34    1.1
> +++ configure.ac    2022/07/21 17:45:51
> @@ -671,7 +671,7 @@
>          mustek_usb mustek_usb2 nec net niash pie pieusb pint \
>          pixma plustek plustek_pp qcam ricoh ricoh2 rts8891 s9036 \
>          sceptre sharp sm3600 sm3840 snapscan sp15c st400 \
> -        stv680 tamarack teco1 teco2 teco3 test u12 umax
> +        stv680 tamarack teco1 teco2 teco3 test u12 umax \
>          umax_pp umax1220u v4l xerox_mfp p5"
>
>  # If user specifies backends manually then cause configure
>
OK, I looked into this a little bit.

The issue is actually caused by the tools/ directory which builds a tool 
called umax_pp.
This tool has a dependency on umax_pp_low which is why, despite the 
umax_pp backend being disabled, the umax_pp_low.c source is built.
There doesn't appear to be a configured way to disable this being built 
so I will add something.

Thanks for raising this issue.

Cheers,
Ralph