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Nixpkgs Architecture Team

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13 Feb 2024
@infinisil:matrix.orginfinisil 9999years: ^ 18:20:01
@infinisil:matrix.orginfinisilit might be though, I need to take a closer look18:21:12
@infinisil:matrix.orginfinisilSame for your new PR (https://github.com/NixOS/nixpkgs/pull/288431)18:21:55
14 Feb 2024
@syphoxy:matrix.org@syphoxy:matrix.org changed their display name from sy to Stalled Engine.13:06:09
@aliarokapis:matrix.orgAlexandros LiarokapisHi all. After much experimentation, I managed to add support for cross building using the precompiled "gcc-arm-embedded" toolchain. This includes taking care of the ccWrapper and binutilsWrapper. In order to avoid actually building gcc from source I had to use replaceStdenvStages and share the cross stages but change the last stage. Maybe it would be useful to add support upstream? It is non-trivial but very useful since it avoids building the toolchain for each difelferent arm-none-eabi configuration and the toolchain is already cached. The ideal way forward would perhaps be to add proper multilib support when cross building for many configurations like arm does with its toolchain. Is any of this worth considering for upstreaming to nixpkgs?15:54:39
@aliarokapis:matrix.orgAlexandros Liarokapis* Hi all. After much experimentation, I managed to add support for cross building using the precompiled "gcc-arm-embedded" toolchain. This includes taking care of the ccWrapper and binutilsWrapper. In order to avoid actually building gcc from source I had to use replaceStdenvStages and share the cross stages except the last one and properly handle float abis naming conventions and more. Maybe it would be useful to add support upstream? It is non-trivial but very useful since it avoids building the toolchain for each difelferent arm-none-eabi configuration and the toolchain is already cached. The ideal way forward would perhaps be to add proper multilib support when cross building for many configurations like arm does with its toolchain. Is any of this worth considering for upstreaming to nixpkgs?15:55:57
@infinisil:matrix.orginfinisil Ping John Ericson ^ 16:39:44
@qyriad:matrix.org@qyriad:matrix.org infinisil: what kind of solution would you prefer? re extendMkDerivation 16:41:57
@infinisil:matrix.orginfinisil Qyriad: A solution that unifies existing approaches in a way as backwards compatible as possible, along with a plan on how the existing approaches can be cleaned up 16:43:45
@infinisil:matrix.orginfinisilI guess in short: Making solutions converge instead of diverge (just adding more alternate approaches)16:44:49
@infinisil:matrix.orginfinisil * I guess in short: Making solutions converge (unifying and cleaning up approaches) instead of diverge (just adding more alternate approaches)16:45:05
@infinisil:matrix.orginfinisilThis takes a whole bunch more effort, but is ultimately what we need to actually clean up Nixpkgs16:46:26
@qyriad:matrix.org@qyriad:matrix.org is extendMkDerivation not a step in that direction though? it adds API surface but would reduce the complexity for the existing alternate approaches 16:50:18
@9999years:matrix.org9999years yeah being able to get the functionality of overridePythonAttrs and overrideCabal in the existing overrideAttrs function is very appealing 16:53:33
@9999years:matrix.org9999yearsi'm a little nervous about the complexity of the code itself -- it seems like it's fairly easy to cause infinite recursion errors -- but it's definitely a step in the right direction16:54:12

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