Native bootstrap for RISC-V on Gentoo Linux (failure)

[dlan17]

Trying to do the native rust bootstrap on Gentoo Linux for RISC-V ARCH, but fail at 'compiler_builtins' crate.

I tried this code:
both tried & failed for rust-1.50.0 and 1.51.0, same error

the downstream bug report can be found here:
https://bugs.gentoo.org/747460

the full build log for 1.51.0:
https://bugs.gentoo.org/attachment.cgi?id=698247

any suggestion for how I could further debug this? or could someone shed some lights on this ..

==== snip of error logs ===

Did not run successfully: signal: 11
rustc exited with signal: 11
"/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1/bin/rustc" "--crate-name" "compiler_builtins" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/vendor/compiler_bui
ltins/src/lib.rs" "--error-format=json" "--json=diagnostic-rendered-ansi,artifacts" "--crate-type" "lib" "--emit=dep-info,metadata,link" "-C" "opt-level=3" "-C" "embed-bitcode=no" "-C" "codegen-units=10000" "-C" "debuginfo=0" "--cfg" "f
eature=\"c\"" "--cfg" "feature=\"cc\"" "--cfg" "feature=\"compiler-builtins\"" "--cfg" "feature=\"core\"" "--cfg" "feature=\"default\"" "--cfg" "feature=\"rustc-dep-of-std\"" "-C" "metadata=bd9daff102317ab4" "-C" "extra-filename=-bd9daf
f102317ab4" "--out-dir" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps" "--target" "riscv64gc-unknown-linux-gnu" "-C" "linker=riscv6
4-unknown-linux-gnu-gcc" "-L" "dependency=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps" "-L" "dependency=/var/notmpfs/portage/dev-l
ang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/release/deps" "--extern" "core=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unk
nown-linux-gnu/release/deps/librustc_std_workspace_core-154d9dce115223e5.rmeta" "--cap-lints" "allow" "-Zmacro-backtrace" "-Zsave-analysis" "-Cprefer-dynamic" "-Cembed-bitcode=yes" "-Cforce-unwind-tables=yes" "-Z" "binary-dep-depinfo" "
-L" "native=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/build/compiler_builtins-dee9282c2b696383/out" "--cfg" "feature=\"unstable\"" "-
-cfg" "__absvdi2=\"optimized-c\"" "--cfg" "__absvsi2=\"optimized-c\"" "--cfg" "__absvti2=\"optimized-c\"" "--cfg" "__addvdi3=\"optimized-c\"" "--cfg" "__addvsi3=\"optimized-c\"" "--cfg" "__addvti3=\"optimized-c\"" "--cfg" "__clzdi2=\"op
timized-c\"" "--cfg" "__clzsi2=\"optimized-c\"" "--cfg" "__clzti2=\"optimized-c\"" "--cfg" "__cmpdi2=\"optimized-c\"" "--cfg" "__cmpti2=\"optimized-c\"" "--cfg" "__ctzdi2=\"optimized-c\"" "--cfg" "__ctzsi2=\"optimized-c\"" "--cfg" "__ct
zti2=\"optimized-c\"" "--cfg" "__divdc3=\"optimized-c\"" "--cfg" "__divsc3=\"optimized-c\"" "--cfg" "__divxc3=\"optimized-c\"" "--cfg" "__extendhfsf2=\"optimized-c\"" "--cfg" "__ffsti2=\"optimized-c\"" "--cfg" "__int_util=\"optimized-c\
"" "--cfg" "__muldc3=\"optimized-c\"" "--cfg" "__mulsc3=\"optimized-c\"" "--cfg" "__mulvdi3=\"optimized-c\"" "--cfg" "__mulvsi3=\"optimized-c\"" "--cfg" "__mulvti3=\"optimized-c\"" "--cfg" "__mulxc3=\"optimized-c\"" "--cfg" "__negdf2=\"
optimized-c\"" "--cfg" "__negdi2=\"optimized-c\"" "--cfg" "__negsf2=\"optimized-c\"" "--cfg" "__negti2=\"optimized-c\"" "--cfg" "__negvdi2=\"optimized-c\"" "--cfg" "__negvsi2=\"optimized-c\"" "--cfg" "__negvti2=\"optimized-c\"" "--cfg" 
"__paritydi2=\"optimized-c\"" "--cfg" "__paritysi2=\"optimized-c\"" "--cfg" "__parityti2=\"optimized-c\"" "--cfg" "__popcountdi2=\"optimized-c\"" "--cfg" "__popcountsi2=\"optimized-c\"" "--cfg" "__popcountti2=\"optimized-c\"" "--cfg" "_
_powixf2=\"optimized-c\"" "--cfg" "__subvdi3=\"optimized-c\"" "--cfg" "__subvsi3=\"optimized-c\"" "--cfg" "__subvti3=\"optimized-c\"" "--cfg" "__truncdfhf2=\"optimized-c\"" "--cfg" "__truncdfsf2=\"optimized-c\"" "--cfg" "__truncsfhf2=\"
optimized-c\"" "--cfg" "__ucmpdi2=\"optimized-c\"" "--cfg" "__ucmpti2=\"optimized-c\"" "--cfg" "apple_versioning=\"optimized-c\"" "-l" "static=compiler-rt" "-Wrust_2018_idioms" "-Wunused_lifetimes" "-Dwarnings" "--sysroot" "/var/notmpfs
/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1" "-C" "panic=abort" "--remap-path-prefix" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src=/rustc/1.51.0" "-Z" "force-unstable-
if-unmarked"
-------------
error: could not compile `compiler_builtins`

Caused by:
  process didn't exit successfully: `/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/bootstrap/debug/rustc --crate-name compiler_builtins /var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/vendor/compi
ler_builtins/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C codegen-units=10000 -C debuginfo=0 --cfg 'feature="c"' --cfg 'fea
ture="cc"' --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=bd9daff102317ab4 -C extra-filename=-bd9daff102317ab4 --out-dir /var/notmpfs/portage/dev-lang/
rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps --target riscv64gc-unknown-linux-gnu -C linker=riscv64-unknown-linux-gnu-gcc -L dependency=/var/notmpfs/portage/dev-
lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps -L dependency=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/release/deps --extern core=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps/librustc_std_workspace_core-154d9dce115223e5.rmeta --cap-lints allow -Zmacro-backtrace -Zsave-analysis -Cprefer-dynamic -Cembed-bitcode=yes -Cforce-unwind-tables=yes -Z binary-dep-depinfo -L native=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/build/compiler_builtins-dee9282c2b696383/out --cfg 'feature="unstable"' --cfg '__absvdi2="optimized-c"' --cfg '__absvsi2="optimized-c"' --cfg '__absvti2="optimized-c"' --cfg '__addvdi3="optimized-c"' --cfg '__addvsi3="optimized-c"' --cfg '__addvti3="optimized-c"' --cfg '__clzdi2="optimized-c"' --cfg '__clzsi2="optimized-c"' --cfg '__clzti2="optimized-c"' --cfg '__cmpdi2="optimized-c"' --cfg '__cmpti2="optimized-c"' --cfg '__ctzdi2="optimized-c"' --cfg '__ctzsi2="optimized-c"' --cfg '__ctzti2="optimized-c"' --cfg '__divdc3="optimized-c"' --cfg '__divsc3="optimized-c"' --cfg '__divxc3="optimized-c"' --cfg '__extendhfsf2="optimized-c"' --cfg '__ffsti2="optimized-c"' --cfg '__int_util="optimized-c"' --cfg '__muldc3="optimized-c"' --cfg '__mulsc3="optimized-c"' --cfg '__mulvdi3="optimized-c"' --cfg '__mulvsi3="optimized-c"' --cfg '__mulvti3="optimized-c"' --cfg '__mulxc3="optimized-c"' --cfg '__negdf2="optimized-c"' --cfg '__negdi2="optimized-c"' --cfg '__negsf2="optimized-c"' --cfg '__negti2="optimized-c"' --cfg '__negvdi2="optimized-c"' --cfg '__negvsi2="optimized-c"' --cfg '__negvti2="optimized-c"' --cfg '__paritydi2="optimized-c"' --cfg '__paritysi2="optimized-c"' --cfg '__parityti2="optimized-c"' --cfg '__popcountdi2="optimized-c"' --cfg '__popcountsi2="optimized-c"' --cfg '__popcountti2="optimized-c"' --cfg '__powixf2="optimized-c"' --cfg '__subvdi3="optimized-c"' --cfg '__subvsi3="optimized-c"' --cfg '__subvti3="optimized-c"' --cfg '__truncdfhf2="optimized-c"' --cfg '__truncdfsf2="optimized-c"' --cfg '__truncsfhf2="optimized-c"' --cfg '__ucmpdi2="optimized-c"' --cfg '__ucmpti2="optimized-c"' --cfg 'apple_versioning="optimized-c"' -l static=compiler-rt` (exit code: 254)
warning: build failed, waiting for other jobs to finish...

Did not run successfully: signal: 11
rustc exited with signal: 11
"/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1/bin/rustc" "--crate-name" "libc" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/vendor/libc/src/lib.rs" "--error-format=json" "--json=diagnostic-rendered-ansi,artifacts" "--crate-type" "lib" "--emit=dep-info,metadata,link" "-C" "opt-level=3" "-C" "embed-bitcode=no" "-C" "codegen-units=1" "-C" "debuginfo=0" "--cfg" "feature=\"align\"" "--cfg" "feature=\"rustc-dep-of-std\"" "--cfg" "feature=\"rustc-std-workspace-core\"" "-C" "metadata=043964802a47f292" "-C" "extra-filename=-043964802a47f292" "--out-dir" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps" "--target" "riscv64gc-unknown-linux-gnu" "-C" "linker=riscv64-unknown-linux-gnu-gcc" "-L" "dependency=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps" "-L" "dependency=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/release/deps" "--extern" "rustc_std_workspace_core=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1-std/riscv64gc-unknown-linux-gnu/release/deps/librustc_std_workspace_core-154d9dce115223e5.rmeta" "--cap-lints" "allow" "-Zmacro-backtrace" "-Zsave-analysis" "-Cprefer-dynamic" "-Cembed-bitcode=yes" "-Cforce-unwind-tables=yes" "-Z" "binary-dep-depinfo" "--cfg" "freebsd11" "--cfg" "libc_priv_mod_use" "--cfg" "libc_union" "--cfg" "libc_const_size_of" "--cfg" "libc_align" "--cfg" "libc_core_cvoid" "--cfg" "libc_packedN" "--cfg" "libc_cfg_target_vendor" "--cfg" "libc_thread_local" "-Wrust_2018_idioms" "-Wunused_lifetimes" "-Dwarnings" "--sysroot" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1" "--remap-path-prefix" "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src=/rustc/1.51.0" "-Z" "force-unstable-if-unmarked"

[eggyal]

@rustbot label: +A-rustbuild +T-compiler +O-linux +O-riscv

[dlan17]

@almindor @Disasm
ping, do you have any suggestion regarding this? I'd really appreciate your help..

[almindor]

Sorry, I've been out of the RiscV loop for a while now, this looks like a core issue with Rustc/core tho. compiler_builtins not compiling.

I don't see much from the cause tho, could you try running this with a debugger? I understand this might be difficult given this is a stage1 recompile. Signal 11 is SEGFAULT during compilation which points to a bigger issue.

[Disasm]

@dlan17 I'd also suggest running the last command under gdb. Also check that you have enough RAM.

[dlan17]

@almindor @Disasm
thanks for your comments, I don't think it's the problem of lacking RAM, I've both tested on sifive unleashed board (8GB mem) and qemu virtual machine (with 20GB mem), same error

I'm trying to debug with gdb, but can't get useful backtrace info, not sure if there is anything I missed..
or is the problem that the stage1 rustc is built as release version? [1]

also I need to set extra ENVs variables to run the error command manually, please help checking if ever I did this correctly? [2]

[1] c Sysroot { compiler: Compiler { stage: 1, host: TargetSelection { triple: "riscv64gc-unknown-linux-gnu", file: None } } }
Copy "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage0-rustc/riscv64gc-unknown-linux-gnu/release/rustc-main" to "/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1/bin/rustc"

[2] check the script and full gdb log here: https://dev.gentoo.org/~dlan/riscv/logs/run_rust.txt

basically the script is something like this
#!/bin/bash

export RUSTC_REAL=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1/bin/rustc
export RUST_BACKTRACE=full
export RUSTC_STAGE=1
export RUSTC_SYSROOT=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1
export RUSTC_LIBDIR=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib
export LD_LIBRARY_PATH=/var/notmpfs/portage/dev-lang/rust-1.51.0/work/rustc-1.51.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib
export RUSTC_BOOTSTRAP=1

${RUST_LAST_COMMAND}

[istankovic]

@dlan17 is this still relevant? Could you please check with latest rust?

[dlan17]

yes, it works for me now, I have several machines with rust-1.66.0, 1.71.1, 1.73.0 installed, thanks for ping this