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lib/systems/inspect.nix: add isILP32 predicate

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I've run into a few packages that need an extra flag on platforms
where `int` has more bits than `void*` does.  I know of three such
platforms:

* [aarch64ilp32], used on both Linux and also on the [Apple Watch]
* [x32], the x86 ILP32 ABI
* [mips64n32], used on [Longsoon] and Cavium Octeon routers.

This PR introduces a predicate so the package flags can be added in
a generic way.

[Apple Watch]: https://gist.github.com/woachk/943828f37c14563a607a26116435bf27#watch
[mips64n32]: https://en.wikipedia.org/wiki/MIPS_architecture#Calling_conventions
[Longsoon]: https://en.wikipedia.org/wiki/Loongson
[x32]: https://en.wikipedia.org/wiki/X32_ABI
This commit is contained in:
Adam Joseph 2022-08-13 02:47:31 -07:00
parent 47fd756154
commit 14f337afb6
1 changed files with 1 additions and 0 deletions
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lib/systems/inspect.nix
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@ -48,6 +48,7 @@ rec {
is32bit = { cpu = { bits = 32; }; };
is64bit = { cpu = { bits = 64; }; };
isILP32 = map (a: { abi = { abi = a; }; }) [ "n32" "ilp32" "x32" ];
isBigEndian = { cpu = { significantByte = significantBytes.bigEndian; }; };
isLittleEndian = { cpu = { significantByte = significantBytes.littleEndian; }; };