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add generic x86_32 support (#52634)

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* add generic x86_32 support

- Add support for i386-i586.
- Add `isx86_32` predicate that can replace most uses of `isi686`.
- `isi686` is reinterpreted to mean "exactly i686 arch, and not say i585 or i386".
- This branch was used to build working i586 kernel running on i586 hardware.

* revert `isi[345]86`, remove dead code

- Remove changes to dead code in `doubles.nix` and `for-meta.nix`.
- Remove `isi[345]86` predicates since other cpu families don't have specific model predicates.

* remove i386-linux since linux not supported on that cpu
This commit is contained in:
Daniel Goertzen
2019-01-06 12:57:36 -06:00
committed by Matthew Bauer
parent a4250d1478
commit 1c10efc912
11 changed files with 15 additions and 10 deletions
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pkgs/build-support/bintools-wrapper/default.nix
+1 -1
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@@ -177,7 +177,7 @@ stdenv.mkDerivation {
/**/ if targetPlatform.isAarch64 then endianPrefix + "aarch64"
else if targetPlatform.isAarch32 then endianPrefix + "arm"
else if targetPlatform.isx86_64 then "x86-64"
else if targetPlatform.isx86 then "i386"
else if targetPlatform.isx86_32 then "i386"
else if targetPlatform.isMips then {
"mips" = "btsmipn32"; # n32 variant
"mipsel" = "ltsmipn32"; # n32 variant