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* [gentoo-user] USE flag "unsupported" for "sci-libs/hdf5"
@ 2020-12-31 16:54 Dr Rainer Woitok
  2020-12-31 17:28 ` netfab
  0 siblings, 1 reply; 3+ messages in thread
From: Dr Rainer Woitok @ 2020-12-31 16:54 UTC (permalink / raw
  To: gentoo-user

Greetings,

after  having decided to  globally set the "threads"  USE flag I get the
following:

These are the packages that would be merged, in order:

Calculating dependencies... done!

!!! The ebuild selected to satisfy "sci-libs/hdf5[mpi]" has unmet requirements.
- sci-libs/hdf5-1.10.5-r1::gentoo USE="fortran hl mpi threads zlib -cxx -debug -examples -szip -unsupported" ABI_X86="(64)"

  The following REQUIRED_USE flag constraints are unsatisfied:
    !unsupported? ( threads? ( !mpi !fortran !hl ) )

  The above constraints are a subset of the following complete expression:
    !unsupported? ( at-most-one-of ( cxx mpi ) threads? ( !cxx !mpi !fortran !hl ) )

(dependency required by "sci-libs/flann-1.9.1-r3::gentoo[mpi]" [installed])
...

Since USE flag "mpi" is required by at least one other package, it seems
I have exactly two options:

   - Set "-threads" for this package thus leaving everything as is,

   - set "unsupported" for this package, without really knowing what the
     consequences would be.

Asking "equery" isn't really enlighting in this case, is it?

$ equery --no-color --no-pipe uses sci-libs/hdf5
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for sci-libs/hdf5-1.10.5-r1:
 U I
 - - cxx         : Build support for C++ (bindings, extra libraries, code
                   generation, ...)
 - - debug       : Enable extra debug codepaths, like asserts and extra output.
                   If you want to get meaningful backtraces see https://wiki.ge
                   ntoo.org/wiki/Project:Quality_Assurance/Backtraces
 - - examples    : Install examples, usually source code
 + + fortran     : Add support for fortran
 + + hl          : Enable high level API
                   (https://support.hdfgroup.org/HDF5/doc/HL/index.html) 
 + + mpi         : Add MPI (Message Passing Interface) layer to the apps that
                   support it
 - - szip        : Use the szip compression library
 + - threads     : Add threads support for various packages. Usually pthreads
 - - unsupported : Enable unsupported combinations of configuration options 
 + + zlib        : Add support for zlib (de)compression
$

Anybody having an educated guess what the risk would be?   Is it save to
set a USE flag even if its name is "unsupported"?

Sincerely,
  Rainer


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [gentoo-user] USE flag "unsupported" for "sci-libs/hdf5"
  2020-12-31 16:54 [gentoo-user] USE flag "unsupported" for "sci-libs/hdf5" Dr Rainer Woitok
@ 2020-12-31 17:28 ` netfab
  2021-01-01 15:53   ` Dr Rainer Woitok
  0 siblings, 1 reply; 3+ messages in thread
From: netfab @ 2020-12-31 17:28 UTC (permalink / raw
  To: gentoo-user


Hi,

Le 31/12/20 à 17:54, Dr Rainer Woitok a tapoté :
> Anybody having an educated guess what the risk would be?   Is it save
> to set a USE flag even if its name is "unsupported"?

Full story here :

	https://bugs.gentoo.org/710986




^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [gentoo-user] USE flag "unsupported" for "sci-libs/hdf5"
  2020-12-31 17:28 ` netfab
@ 2021-01-01 15:53   ` Dr Rainer Woitok
  0 siblings, 0 replies; 3+ messages in thread
From: Dr Rainer Woitok @ 2021-01-01 15:53 UTC (permalink / raw
  To: gentoo-user, netfab

Netfab,

On Thursday, 2020-12-31 18:28:07 +0100, you wrote:

> ...
> > Anybody having an educated guess what the risk would be?   Is it save
> > to set a USE flag even if its name is "unsupported"?
> 
> Full story here :
> 
> 	https://bugs.gentoo.org/710986

Hmmm, not very enlighting either.  I think I'll set "-threads" for this
package, just to be safe.

Sincerely,
  Rainer


^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-01-01 15:53 UTC | newest]

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2020-12-31 16:54 [gentoo-user] USE flag "unsupported" for "sci-libs/hdf5" Dr Rainer Woitok
2020-12-31 17:28 ` netfab
2021-01-01 15:53   ` Dr Rainer Woitok

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