[MirageOS-devel] removal of deprecated config in mirage 3.0 (mirage configure --unix/--xen, add_to_opam_packages, add_to_libraries)

[Mindy <mindy@xxxxxxxxxxxxxxxxxxx>]

Hi all,

As part of the move to Functoria, a few things were deprecated:

* invoking mirage configure --unix and mirage configure --xen to build 
for UNIX/Xen targets.  Instead, use mirage configure -t unix or -t xen.
* using add_to_opam_packages to install extra required packages not 
detected by the mirage front-end tool.  Instead, pass the same list to 
`register` in the ~packages named argument.
* similarly, using add_to_ocamlfind_libraries to link against extra 
libraries.  Instead, pass the same list to `register` in the ~libraries 
named argument.
These have worked in `mirage` versions to this point, with an 
unfortunate side effect: an uncompileable `config.ml` results in a 
misleading error message telling the user they've supplied an invalid 
flag on the command line.  Fixing this bug is significantly easier if 
the deprecated functions are removed, so I'd like to remove them in 
Mirage 3.0.
Branches of Functoria and Mirage which remove this functionality (and 
fix the mentioned bug) can be previewed via the following PRs:
https://github.com/mirage/functoria/pull/65

https://github.com/mirage/mirage/pull/560

Thanks,

Mindy


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