RISC-V linux cross compilation failing since staging-next merge

[Madouura]

Describe the bug

At least since #168737 was merged into master, #168826 has failed to compile.
I suspect a GCC change causing this issue.

riscv64-linux-gcc -DHAVE_CONFIG_H -I. -I../..  -DLOCALEDIR=\"/nix/store/84q2jjw95gh7qy3iqvqb45jn2zbhvj88-xz-riscv64-linux-5.2.5/share/locale\" -I../../src/common -I../../src/liblzma/api -I../../lib  -pthread -fvisibility=hidden -Wall -Wextra -Wvla -Wformat=2 -Winit-self -Wmissing-include-dirs -Wstrict-aliasing -Wfloat-equal -Wundef -Wshadow -Wpointer-arith -Wbad-function-cast -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-noreturn -Wredundant-decls -g -O2 -c -o xz-tuklib_mbstr_width.o `test -f '../common/tuklib_mbstr_width.c' || echo './'`../common/tuklib_mbstr_width.c
   riscv64-linux-g++     ...  servls.cpp
  CC       setlocale_null.o
checking for pthread_join in -lpthread... yes
checking for isblank... yes
riscv64-linux-gcc -I.  -DHAVE_CONFIG_H -g -O2 -ggdb3 -Wall -W -Wno-sign-compare   -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes   -Wpointer-arith -Wbad-function-cast -Wnested-externs -fpic  -c rsa-sec-compute-root.c \
&& true
../arch/riscv/include/asm/vdso/gettimeofday.h: Assembler messages:
../arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a4,0xc01'
../arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a5,0xc01'
../arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a4,0xc01'
../arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a5,0xc01'
make[2]: *** [../scripts/Makefile.build:288: arch/riscv/kernel/vdso/vgettimeofday.o] Error 1
/nix/store/fcd0m68c331j7nkdxvnnpb8ggwsaiqac-bash-5.1-p16/bin/bash ./libtool  --tag=CC   --mode=compile riscv64-linux-gcc -DHAVE_CONFIG_H -I.     -g -O2 -c -o mips/mips_init.lo mips/mips_init.c
Enabled Schematron support
make[1]: *** [../arch/riscv/Makefile:120: vdso_prepare] Error 2
make[1]: Leaving directory '/build/source/build'
make: *** [Makefile:219: __sub-make] Error 2
/nix/store/fcd0m68c331j7nkdxvnnpb8ggwsaiqac-bash-5.1-p16/bin/bash ../libtool  --tag=CC   --mode=compile riscv64-linux-gcc -DHAVE_CONFIG_H -I. -I..    -I/nix/store/agic7qa5l02cfy2vyq2nabpg2dq6px1v-libgpg-error-riscv64-linux-1.42-dev/include  -g -O2 -fvisibility=hidden -fno-delete-null-pointer-checks -Wall -c -o libgcrypt_la-global.lo `test -f 'global.c' || echo './'`global.c
riscv64-linux-gcc -DHAVE_CONFIG_H -I. -I../..  -DLOCALEDIR=\"/nix/store/84q2jjw95gh7qy3iqvqb45jn2zbhvj88-xz-riscv64-linux-5.2.5/share/locale\" -I../../src/common -I../../src/liblzma/api -I../../lib  -pthread -fvisibility=hidden -Wall -Wextra -Wvla -Wformat=2 -Winit-self -Wmissing-include-dirs -Wstrict-aliasing -Wfloat-equal -Wundef -Wshadow -Wpointer-arith -Wbad-function-cast -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-noreturn -Wredundant-decls -g -O2 -c -o xz-tuklib_mbstr_fw.o `test -f '../common/tuklib_mbstr_fw.c' || echo './'`../common/tuklib_mbstr_fw.c
builder for '/nix/store/qbplv2xrhm7vykirys4p4fdpvs5l6vdz-linux-riscv64-linux-5.17.1-visionfive.drv' failed with exit code 2
cannot build derivation '/nix/store/5ncfqz7m4nqhawfwdcib850dccd59p3b-nixos-system-nixos-22.05pre-git.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/ykl76jhdjahkhx22zk00pk26a7jrhg88-ext4-fs.img.zst-riscv64-linux.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/9b2w7mdbh54n82g3xy2xnfgzlij0m3mr-nixos-sd-image-22.05pre-git-riscv64-linux-visionfive.img-riscv64-linux.drv': 1 dependencies couldn't be built
error: build of '/nix/store/9b2w7mdbh54n82g3xy2xnfgzlij0m3mr-nixos-sd-image-22.05pre-git-riscv64-linux-visionfive.img-riscv64-linux.drv' failed

Same issue with linux-5.15.34 with no changes.

  LINK     resolve_btfids
  LDS     arch/riscv/kernel/vdso/vdso.lds
  AS      arch/riscv/kernel/vdso/rt_sigreturn.o
  CC      arch/riscv/kernel/vdso/vgettimeofday.o
../arch/riscv/include/asm/vdso/gettimeofday.h: Assembler messages:
../arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a4,0xc01'
../arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a4,0xc01'
make[2]: *** [../scripts/Makefile.build:277: arch/riscv/kernel/vdso/vgettimeofday.o] Error 1
make[1]: *** [../arch/riscv/Makefile:121: vdso_prepare] Error 2
make[1]: Leaving directory '/build/linux-5.15.34/build'
make: *** [Makefile:219: __sub-make] Error 2
builder for '/nix/store/nbmmmcbrnrhr6c8hcznw0ybjzn55sj5b-linux-riscv64-unknown-linux-gnu-5.15.34.drv' failed with exit code 2
error: build of '/nix/store/nbmmmcbrnrhr6c8hcznw0ybjzn55sj5b-linux-riscv64-unknown-linux-gnu-5.15.34.drv' failed

Expected behavior

Successful (starfive variant) linux kernel cross compilation from x86_64 to risc64.

Additional context

Attempting to build #168826

Notify maintainers

@fabianhjr @mweinelt (#168737 (comment))

Metadata

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 5.16.20, NixOS, 21.11 (Porcupine)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.16`
 - channels(root): `"nixos-21.11, home-manager-21.11"`
 - channels(mado): `"home-manager-21.11, nixos-21.11.337100.7b38b03d76a, nixos-unstable-22.05pre369988.1ffba9f2f68"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[Madouura]

Interestingly, adding stdenv = pkgs.overrideCC pkgs.stdenv pkgs.buildPackages.gcc11; to the proper entry in linux-kernels.nix fixes this.

[NickCao]

Maybe it's a chance to bump the default stdenv for riscv64-linux to gcc11? I'd like to test if it works out.

[NickCao]

Maybe it's a chance to bump the default stdenv for riscv64-linux to gcc11? I'd like to test if it works out.

It worked out way better than I anticipated, https://hydra.nichi.co/eval/707, the only major regression is gccForLibs failing, drowning the llvmPackages.

[Madouura]

Will be fixed by #170991.