!ayCRiZriCVtuCUpeLp:nixos.org

Nix Cross Compiling

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14 Feb 2025
@artturin:matrix.orgArtturinRedacted or Malformed Event18:56:47
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18:56:52
@artturin:matrix.orgArtturin here's a nix-diff 18:56:57
@artturin:matrix.orgArtturin I'm not sure if gcc really needs those 2 flags because cc-wrapper has -mcpu and -march 18:59:19
@rosssmyth:matrix.org@rosssmyth:matrix.orgYeah that's what I was hoping it would set 😅. 19:00:10
@artturin:matrix.orgArtturin stdenv = overrideCC stdenv (buildPackages.wrapCC (stdenv.cc // { stdenv.cc.targetPlatform = stdenv.cc.targetPlatform // { gcc = stdenv.cc.targetPlatform.gcc // { arch = "arv6m"; cpu = "cortex-m0"; thumb = true; }; }; })) 19:07:09
@artturin:matrix.orgArtturin * stdenv = overrideCC stdenv (buildPackages.wrapCC (stdenv.cc // { stdenv.cc.targetPlatform = stdenv.cc.targetPlatform // { gcc = stdenv.cc.targetPlatform.gcc // { arch = "arv6m"; cpu = "cortex-m0"; thumb = true; }; }; })); 19:07:11
@artturin:matrix.orgArtturinShould work if the gcc flags aren't really needed19:08:06
@artturin:matrix.orgArtturin* Should work if the gcc build flags aren't really needed19:08:51
@rosssmyth:matrix.org@rosssmyth:matrix.org If I put that in my default.nix it results in an infinite recursion. My plan with this is to be able to build for both the armv6m target and my x86 host as I have tests that meson runs as well. I am currently using the arm-embedded-gcc packages in a noCC derivation. 19:17:36
@artturin:matrix.orgArtturin Change the variable name or put it in the callPackage overrides 19:18:36
@artturin:matrix.orgArtturin callPackage ./file.nix { <here> 19:18:47
@artturin:matrix.orgArtturin * callPackage ./file.nix { <here> } 19:18:49
@rosssmyth:matrix.org@rosssmyth:matrix.org

It still errors with infinite recursion. I have it setup as

highPower = with armPkgs;
  callPackage ./default.nix {
    stdenv = with pkgs;
      overrideCC stdenv (buildPackages.wrapCC (stdenv.cc
        // {
          stdenv.cc.targetPlatform =
            stdenv.cc.targetPlatform
            // {
              gcc =
                stdenv.cc.targetPlatform.gcc
                // {
                  arch = "arv6m";
                  cpu = "cortex-m0";
                  thumb = true;
                };
            };
        }));
  };
20:04:05
@rosssmyth:matrix.org@rosssmyth:matrix.orgoh wait20:04:14
@rosssmyth:matrix.org@rosssmyth:matrix.orgI think I see the error20:04:26
@rosssmyth:matrix.org@rosssmyth:matrix.org *

It still errors with infinite recursion. I have it setup as

highPower = with armPkgs;
  callPackage ./default.nix {
    stdenv = 
      overrideCC stdenv (buildPackages.wrapCC (stdenv.cc
        // {
          stdenv.cc.targetPlatform =
            stdenv.cc.targetPlatform
            // {
              gcc =
                stdenv.cc.targetPlatform.gcc
                // {
                  arch = "arv6m";
                  cpu = "cortex-m0";
                  thumb = true;
                };
            };
        }));
  };
20:05:06
@rosssmyth:matrix.org@rosssmyth:matrix.orgNo, I don't20:06:35
@artturin:matrix.orgArtturinLook through the trace20:17:09
@alexfmpe:matrix.orgalexfmpe
In reply to @emilazy:matrix.org
fwiw still personally happy to mentor bringing iOS support up to date in line with my previous statements about how it should work :P
I remember, it's just taking longer than I expected to get through pkgsCross.ghcjs so not enough budget yet for iOS
20:26:24
@alexfmpe:matrix.orgalexfmpeThere's also the, heh, cross cutting concern of template haskell20:27:09
@rosssmyth:matrix.org@rosssmyth:matrix.orgThat still ends up building it in ARM mode. Oh well.20:44:36
@lucassong:matrix.orglucassong joined the room.20:53:29
@lucassong:matrix.orglucassonghello20:53:47
15 Feb 2025
@alexfmpe:matrix.orgalexfmpe hmm the types.h errors are gone in staging-next, someone must have fixed something in between 00:45:47
@alexfmpe:matrix.orgalexfmpe though android-ndk-toolchain fails from the recent noBrokenSymlinks 00:46:23
@alexfmpe:matrix.orgalexfmpe * though android-ndk-toolchain still fails from the recent noBrokenSymlinks 00:57:01
@alexfmpe:matrix.orgalexfmpe ah yeah no false alarm, I was building the wrong thing, the types.h and other errors are present in staging(-next) 01:06:05
@alexfmpe:matrix.orgalexfmpefixed this one at least: https://github.com/NixOS/nixpkgs/pull/38218201:23:07
@benjb83:matrix.orgBenjB83 joined the room.10:14:34

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