| 7 May 2025 |
 szlend | This is my understanding of how perspective shifts, but I could be very wrong: https://gist.github.com/szlend/62bfa710ff89b7dc3a871693ca34c94c | 21:22:38 |
| szlend | So I kinda wanna confirm it :D | 21:22:45 |
 SomeoneSerge (back on matrix) | Does root refer to the current derivation? | 21:25:44 |
 K900 | Can you not overlay it on pkgs? | 21:27:35 |
| szlend | I'm thinking about it like root == pkgsCross.<platform> == pkgsCross.<platform>.pkgsHostTarget (assuming those are equivalent) | 21:27:44 |
| szlend | so pkgsCross.<platform>.pkgsBuildHost.pkgsBuildTarget == pkgsCross.<platform>.pkgsHostHost | 21:28:39 |
| szlend | * so pkgsCross.<platform>.pkgsBuildHost.pkgsTargetTarget == pkgsCross.<platform>.pkgsHostHost | 21:28:57 |
| szlend | or maybe root.pkgsBuildHost.pkgsTargetTarget == root.pkgsHostTarget (since targetTarget is +1,+1) | 21:36:15 |
| SomeoneSerge (back on matrix) | It's the former, because ps: ps.pkgsTargetTarget translates by the vector of (1, 0), which is how you get from the point (0, 1) (pkgs = pkgsHostTarget) to the point (1, 1) (pkgs.pkgsTargetTarget) | 21:41:55 |
| SomeoneSerge (back on matrix) | Setup-hooks here print the accumulated vectors, but not the result of translating the current' derivation's platforms (0, 1) by that vector | 21:44:01 |
| szlend | I see yeah, thanks! I think I actually got it then | 21:48:52 |
| 8 May 2025 |
|  98765abc changed their profile picture. | 11:35:04 |
 @curid:matrix.org | Redacted or Malformed Event | 19:03:13 |
| @curid:matrix.org | Is there a better way to write this?
NIX_CFLAGS_COMPILE = if pkgs.system == "aarch64-unknown-linux-gnu" then "" else "-msse4.2" | 19:14:52 |
| K900 | if !stdenv.hostPlatform.isx86 | 19:17:58 |
| K900 | Or rather | 19:18:10 |
| K900 | lib.optionalString stdenv.hostPlatform.isx86 "-msse4.2" | 19:18:21 |
| 9 May 2025 |
| @curid:matrix.org | let
# latest unstable
pkgs = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/b3582c75c7f21ce0b429898980eddbbf05c68e55.tar.gz")
{
crossSystem = "aarch64-unknown-linux-gnu";
}).__splicedPackages;
in pkgs.mkShell {
buildInputs = [ pkgs.cpuid ];
}
src/x86/cpuid.c:138:10: fatal error: cpuid.h: No such file or directory
138 | #include <cpuid.h>
It seems to build x86 specific files https://github.com/pytorch/cpuinfo/blob/main/CMakeLists.txt
| 16:15:48 |
 Tristan Ross |
- Use
packages
- Add
cmake (& optionally ninja) to packages
| 16:24:51 |
| @curid:matrix.org | I'm stupid, the cpuid package has nothing to do with cpuid.h | 16:37:11 |
| @curid:matrix.org | 🤔
> CMake Error at CMakeLists.txt:71 (MESSAGE):
> Unrecognized CMAKE_SYSTEM_PROCESSOR value "x86_64"
https://github.com/google/XNNPACK/blob/659147817805d17c7be2d60bd7bbca7e780f9c82/CMakeLists.txt#L71
| 18:30:29 |
| 10 May 2025 |
| @curid:matrix.org | How can I tell mkDerivation that the CMakeLists.txt isn't in the root dir? https://github.com/google/gemmlowp/tree/master/contrib | 17:16:18 |
| @curid:matrix.org | I'd ask in the main room if I could join it | 17:16:23 |
| K900 | sourceRoot | 17:16:35 |
| K900 | Also invited to the main room | 17:16:50 |
| 11 May 2025 |
| @curid:matrix.org | is cmake message(${CMAKE_SYSTEM_PROCESSOR}) suppose to print x86_64? | 08:04:19 |
| @curid:matrix.org |
When cross-compiling, a CMAKE_TOOLCHAIN_FILE should set the CMAKE_SYSTEM_PROCESSOR variable to match target architecture that it specifies (via CMAKE_<LANG>COMPILER and perhaps CMAKE<LANG>_COMPILER_TARGET).
Am I suppose to set it manually?
| 08:05:35 |
| @curid:matrix.org | Redacted or Malformed Event | 19:16:46 |
| @curid:matrix.org | I finally managed to get tensorflow lite to cross-compile to aarch64 by using cmake instead of bazel: https://paste.debian.net/1374172/ | 19:17:16 |
| @curid:matrix.org | should I upstream it? | 19:33:39 |
