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Sender	Message	Time
30 Oct 2021
sterni	yeah can reproduce as well, hmmm	10:21:00
@AleXoundOS:matrix.org	I use 21.05 nixpkgs pin. But not the latest. Maybe should try the latest...	10:21:50
sterni	seems like something goes wrong while compiling libsanitizer for mips?	10:21:58
sterni	@AleXoundOS:matrix.org: no need, compiled on recent-ish master	10:22:07
@AleXoundOS:matrix.org	More precisely the build failed with `cc1: error: no include path in which to search for stdc-predef.h`.	10:23:19
@AleXoundOS:matrix.org	* More precisely, the build failed with `cc1: error: no include path in which to search for stdc-predef.h`.	10:23:26
@AleXoundOS:matrix.org	But I forgot to add the same `-I nixpkgs` pin for your test case. Will try now. It seems errors are different but both when trying to build gcc.	10:24:35
sterni	ah okay then the error is different to nixpkgs master…	10:24:54
@AleXoundOS:matrix.org	@sterni, running `$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz -E 'with import <nixpkgs> { crossSystem = "mipsel-linux"; }; hello'` results in same errors as when I tried `pkgsCross.fuloongminipc.hello`: `../../../../gcc-10.3.0/libsanitizer/sanitizer_common/sanitizer_syscall_generic.inc:19:24: error: '__NR_mmap2' was not declared in this scope` ... `../../../../gcc-10.3.0/libsanitizer/sanitizer_common/sanitizer_linux.cpp:247:23: error: 'struct stat64' has no member named 'st_atim'; did you mean 'st_atime'?` and a few more errors `builder for '/nix/store/jqxv6pgil8n0bb95c6hgw5bs7ghmrcdg-mipsel-unknown-linux-gnu-stage-final-gcc-debug-10.3.0.drv' failed with exit code 2`	10:37:31
@AleXoundOS:matrix.org	In reply to @sternenseemann:systemli.org seems like something goes wrong while compiling libsanitizer for mips? So yes, you're right.	12:06:38
@AleXoundOS:matrix.org	Following https://github.com/NixOS/nixpkgs/issues/77732, https://hydra.nixos.org/job/nixpkgs/cross-trunk/fuloongminipc.buildPackages.gcc.x86_64-linux, https://hydra.nixos.org/build/108244977, latest successful build is mipsel-unknown-linux-gnu-stage-final-gcc-debug-wrapper-8.3.0.	12:08:49
symphorien	In reply to @AleXoundOS:matrix.org So yes, you're right. you can probably disable it here for your arch: https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/compilers/gcc/common/configure-flags.nix#L92-L95	12:12:56
@AleXoundOS:matrix.org	Ok, I will try. Btw, I'm not against using uclibc, but `uclibc-ng-1.0.37` "is not supported on ‘mipsel-linux’, refusing to evaluate". That is strange, because uclibc is compatible with mipsel.	12:18:16
@AleXoundOS:matrix.org	* Ok, I will try. Btw, I'm not against using uclibc, but `uclibc-ng-1.0.37` "is not supported on ‘mipsel-linux’, refusing to evaluate". That is strange, because uclibc is compatible with mipsel. `nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz '<nixpkgs>' -A pkgsCross.ben-nanonote.hello`.	12:18:47
symphorien	What I had in mind is you could clone nixpkgs, and edit the file to add `or stdenv.isMyArch` to the conditional	12:21:59
symphorien	if that works you could even PR it to nixpkgs	12:22:20
@AleXoundOS:matrix.org	In reply to @symphorien:xlumurb.eu What I had in mind is you could clone nixpkgs, and edit the file to add `or stdenv.isMyArch` to the conditional I haven't yet understand how to add new `stdenv.isMyArch` with custom compiler (that was my original plan).	13:20:13
symphorien	apparently stdenv.isMips exists	13:23:55
symphorien	but as sterni said, maybe first focus on making nixpkgs's gcc work	13:25:02
symphorien	there are probably bugs in nixpkgs regarding mips support that you will find quicker with gcc	13:25:58
symphorien	and that are common to all compilers	13:26:09
@AleXoundOS:matrix.org	In reply to @symphorien:xlumurb.eu What I had in mind is you could clone nixpkgs, and edit the file to add `or stdenv.isMyArch` to the conditional * I haven't yet understood how to add new `stdenv.isMyArch` with custom compiler (that was my original plan).	13:27:55
trofi	libsanitizer probably needs to be disabled on mips.	17:39:40
trofi	`pkgs/development/compilers/gcc/common/configure-flags.nix` has a few cases when `--disable-libsanitizer` is passed. I think it makes sense to throw a mipsel variant there.	17:50:35
trofi	I had an imprssion that libsanitizer supports only 64-bit userspace. And mipsel- should be 32-bit as well. https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libsanitizer/configure.tgt;h=5a59ea6a1b5e7e37c5e5ab4de5fc3b76a9279a86;hb=HEAD#l61 claims to have some non-64-bit mips support (probably did bitrot).	17:53:13
@AleXoundOS:matrix.org	In reply to @trofi:matrix.org libsanitizer probably needs to be disabled on mips. How can I override this? `nix-build --show-trace --dry-run -E 'with import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz) { overlays = [ (self: super: { gcc = super.gcc.overrideAttrs (def: { configureFlags = def.configureFlags ++ [ "--disable-libsanitizer" ]; }); }) ]; }; pkgsCross.fuloongminipc.hello'` fails with `attribute 'configureFlags' missing`.	17:56:01
@AleXoundOS:matrix.org	In reply to @trofi:matrix.org libsanitizer probably needs to be disabled on mips. * How can I override this? `nix-build -E 'with import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz) { overlays = [ (self: super: { gcc = super.gcc.overrideAttrs (def: { configureFlags = def.configureFlags ++ [ "--disable-libsanitizer" ]; }); }) ]; }; pkgsCross.fuloongminipc.hello'` fails with `attribute 'configureFlags' missing`.	17:56:15
@AleXoundOS:matrix.org	* How can I override this? `nix-build -E 'with import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz) { overlays = [ (self: super: { gcc = super.gcc.overrideAttrs (def: { configureFlags = def.configureFlags ++ [ "--disable-libsanitizer" ]; }); }) ]; }; pkgsCross.fuloongminipc.hello'` fails with `attribute 'configureFlags' missing`.	17:57:45
@AleXoundOS:matrix.org	* How can I override this? `nix-build -E 'with import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/d4590d21006387dcb190c516724cb1e41c0f8fdf.tar.gz) { overlays = [ (self: super: { gcc = super.gcc.overrideAttrs (def: { configureFlags = def.configureFlags ++ [ "--disable-libsanitizer" ]; }); }) ]; }; pkgsCross.fuloongminipc.hello'` fails with `attribute 'configureFlags' missing`.	17:58:00
trofi	I think it's a bit more complicated than that due to gcc bootstrapping and wrapping. But maybe overlay would work with a bit more tweaking. Let's see where those flags are actually passed.	18:11:57

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