[tlbuild] Building svn57874.tar.gz (from github)

[texlive at schoepfer.info]

On 2021-03-05 00:58, Karl Berry wrote:
> I'd assume that configure should stop immediately if an unsupported
>     option is used,
> 
> --with and --enable are exceptions to that; there, unrecognized options
> are simply ignored. Per GNU standards, since the beginning.

Thanks for the explanation. It is sufficient to me to know that these 
options shouldn't
be used anymore.
I still don't understand why then "--with-system-xpdf" makes a 
difference for configure.

Johannes