boost: Do not force numpy support from 1.65#33359
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Instead of doing a mass rebuild, we can just change the fallback value like so. I think that would be better?
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enableNumpy = args.enableNumpy or stdenv.hostPlatform == stdenv.buildPlatform;`
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Yes could do this but it is not ideal: the same logic is repeated in the generic.nix and for each version. And the proper logic would also take into account if enablePython is passed into args: if that is false, enableNumpy should be false too.
Ideally it could all be handled in generic.nix?
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diito
(enableNumpy = args.enableNumpy or stdenv.hostPlatform == stdenv.buildPlatform;`)
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Good points in https://github.com/NixOS/nixpkgs/pull/33359/files#r15934008 . How does this look?
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This more directly implements 19dbfb6's description "In order to manipulate Python arrays numpy is needed from boost 1.65 on".
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The reason is that if cross compiling (or for other reasons) python bindings as a whole are turned off. Those two lines then trigger assertion errors unless manually overridden for cross compilation. This way: 1. The `enableNumpy` default respects the `enablePython deafult. 2. Cross works by default 3. Absurd manual overrides still break as they should 4. The `>= 1.65` logic is direct and not a maintaince gotcha.
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That’s great, thanks
From: Frederik Rietdijk [mailto:notifications@github.com]
Sent: 03 January 2018 07:38
To: NixOS/nixpkgs <nixpkgs@noreply.github.com>
Cc: bnikolic <bojan@bnikolic.co.uk>; Mention <mention@noreply.github.com>
Subject: Re: [NixOS/nixpkgs] boost: Do not force numpy support from 1.65 (#33359)
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Motivation for this change
The reason is that if cross compiling (or for other reasons) python bindings as a whole are turned off. Those two lines then trigger assertion errors unless manually overridden for cross compilation.
This way:
enableNumpydefault respects the `enablePython deafult.>= 1.65logic is direct and not a maintaince gotcha.Things done
build-use-sandboxinnix.confon non-NixOS)nix-shell -p nox --run "nox-review wip"./result/bin/)