| 3 Nov 2021 |
 symphorien | here you need to inspect targetPlatform I think | 20:09:58 |
| symphorien | hostPlatform is the platform that runs the compiler you are building | 20:10:26 |
| symphorien | so it's likely to be x86 64 | 20:11:03 |
 @AleXoundOS:matrix.org | In reply to @symphorien:xlumurb.eu
hostPlatform is the platform that runs the compiler you are building Hmm. When I patched boost for mips32r2, the code after optionals (stdenv.hostPlatform != stdenv.buildPlatform) was significant and responsible to setting the architecture. | 20:14:22 |
| @AleXoundOS:matrix.org | In reply to @symphorien:xlumurb.eu
hostPlatform is the platform that runs the compiler you are building * Hmm. When I patched boost for mips32r2, the code after optionals (stdenv.hostPlatform != stdenv.buildPlatform) was significant and responsible fpr setting the architecture. | 20:14:38 |
| symphorien | boost is not a compiler | 20:14:48 |
| @AleXoundOS:matrix.org | * Hmm. When I patched boost for mips32r2, the code after optionals (stdenv.hostPlatform != stdenv.buildPlatform) was significant and responsible for setting the architecture. | 20:15:00 |
| symphorien | host platform is the platform the code you compile runs on -> for a lib, it's where you put the .so so mips | 20:15:21 |
| @AleXoundOS:matrix.org | In my mind these two statements about what is host platform come into conflict :) | 20:17:22 |
| symphorien | when you compile a compiler for mips but that runs on x86, hostplatform = x86 and target = mips | 20:18:59 |
| symphorien | when you compile boost for mips, hostplatform = mips, target = whatever | 20:19:15 |
| symphorien | because $out/bin/gcc is x86 and $out/lib/boost is mips | 20:19:31 |
| symphorien | phrased differently, hostplatform is the platform of executables that go in $out | 20:20:28 |
| symphorien | modulo the fact that gcc contains some libs for the target platforms but let's keep it simple and approximate | 20:21:14 |
| @AleXoundOS:matrix.org | Btw, if somebody interested getting ldd for host platform when cross-compiling I managed to get this with (pkgs.glibcCross.overrideAttrs (_: { preFixup = null; })).bin. Full command:
nix-build --dry-run -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz -E 'with import <nixpkgs> { overlays = [ (self: super: { wrapCC = cc: super.wrapCC (cc.overrideAttrs (def: { configureFlags = def.configureFlags ++ [ "--disable-libsanitizer" ]; })); }) ]; crossSystem = { config = "mipsel-linux"; gcc.arch = "mips32r2"; gcc.abi = "32"; }; }; (glibcCross.overrideAttrs (_: { preFixup = null; })).bin'.
And it runs fine on the hardware. | 21:45:00 |
| @AleXoundOS:matrix.org | The trick is to use glibcCross instead of glibc. | 21:45:59 |
| @AleXoundOS:matrix.org | * Btw, if somebody interested getting ldd for host platform when cross-compiling I managed to get this with (pkgs.glibcCross.overrideAttrs (_: { preFixup = null; })).bin. Full command:
nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz -E 'with import <nixpkgs> { overlays = [ (self: super: { wrapCC = cc: super.wrapCC (cc.overrideAttrs (def: { configureFlags = def.configureFlags ++ [ "--disable-libsanitizer" ]; })); }) ]; crossSystem = { config = "mipsel-linux"; gcc.arch = "mips32r2"; gcc.abi = "32"; }; }; (glibcCross.overrideAttrs (_: { preFixup = null; })).bin'.
And it runs fine on the hardware. | 21:55:38 |
|  piegames set a profile picture. | 22:01:14 |
 trofi | @AleXoundOS:matrix.org: yeah, I think you should be able to apply --disable-libsanitizer only for cross-compiler (or set more specific constraints). def is a set of known attributes being evaluated. Probably something like if (def.stdenv.buildPlatform != def.stdenv.hostPlatform) then [ "--disable-libsanitizer" ] else []. Totally untested. | 22:31:23 |
 Sandro | lib.optional is shorter for this usecase | 22:38:32 |
| 4 Nov 2021 |
 sterni | @AleXoundOS:matrix.org: btw I looked into it and it seems fine to install ldd etc in the cross case as well: https://github.com/NixOS/nixpkgs/pull/144417 | 01:10:13 |
| sterni | * @AleXoundOS:matrix.org: btw I looked into it and it seems fine to install ldd etc in the cross case for the normal derivation as well: https://github.com/NixOS/nixpkgs/pull/144417 | 01:10:24 |
| 5 Nov 2021 |
| @AleXoundOS:matrix.org | In reply to @trofi:matrix.org
@AleXoundOS:matrix.org: yeah, I think you should be able to apply --disable-libsanitizer only for cross-compiler (or set more specific constraints). def is a set of known attributes being evaluated. Probably something like if (def.stdenv.buildPlatform != def.stdenv.hostPlatform) then [ "--disable-libsanitizer" ] else []. Totally untested. stdenv is not there: error: attribute 'stdenv' missing, at .... And nixpkgs manual states:
The function overrideAttrs allows overriding the attribute set passed to a stdenv.mkDerivation call
stdenv is not in attribute set.
| 16:02:49 |
| @AleXoundOS:matrix.org | What finally worked is easy (after symphorien explained platforms terms):
overlay-embedded = self: super: { wrapCC = cc: super.wrapCC ( cc.overrideAttrs ( def: { configureFlags = def.configureFlags ++ ( super.lib.optional def.stdenv.targetPlatform.isMips "--disable-libsanitizer" ); } ) ); }; | 16:03:59 |
| @AleXoundOS:matrix.org | * What finally worked is easy (after symphorien explained platforms terms):
self: super: { wrapCC = cc: super.wrapCC ( cc.overrideAttrs ( def: { configureFlags = def.configureFlags ++ ( super.lib.optional def.stdenv.targetPlatform.isMips "--disable-libsanitizer" ); } ) ); }; | 16:04:18 |
| @AleXoundOS:matrix.org | * What finally worked is easy (after symphorien explained platforms terms):
self: super: { wrapCC = cc: super.wrapCC ( cc.overrideAttrs ( def: { configureFlags = def.configureFlags ++ ( super.lib.optional super.stdenv.targetPlatform.isMips "--disable-libsanitizer" ); } ) ); }; | 16:05:52 |
| @AleXoundOS:matrix.org | * What finally worked is easy (after symphorien explained platforms terms):
self: super: { wrapCC = cc: super.wrapCC ( cc.overrideAttrs ( def: { configureFlags = def.configureFlags ++ (super.lib.optional super.stdenv.targetPlatform.isMips "--disable-libsanitizer" ); } ) ); }; | 16:08:00 |
| 6 Nov 2021 |
|  Tseb joined the room. | 09:18:43 |
| 7 Nov 2021 |
|  Mic92 set a profile picture. | 17:25:38 |
| 9 Nov 2021 |
|  nurelin set a profile picture. | 16:05:03 |
