1.17.0 armv7-gnueabihf Debian: SIGILL: illegal instruction

[infinity0]

Build log: https://buildd.debian.org/status/fetch.php?pkg=rustc&arch=armhf&ver=1.17.0%2Bdfsg2-1&stamp=1495073322&raw=0

   Compiling rustc_llvm v0.0.0 (file:///«BUILDDIR»/rustc-1.17.0+dfsg2/src/librustc_llvm)
     Running `/«BUILDDIR»/rustc-1.17.0+dfsg2/build/bootstrap/debug/rustc --crate-name build_script_build src/librustc_llvm/build.rs --crate-type bin --emit=dep-info,link -C opt-level=2 -C metadata=7c8f3739ac3c0863 -C extra-filename=-7c8f3739ac3c0863 --out-dir '/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/build/rustc_llvm-7c8f3739ac3c0863' -L 'dependency=/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/deps' --extern 'build_helper=/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/deps/libbuild_helper-2e1c0ec5e6931b16.rlib' --extern 'gcc=/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/deps/libgcc-4503356c54b13195.rlib'`
   Compiling rustdoc v0.0.0 (file:///«BUILDDIR»/rustc-1.17.0+dfsg2/src/librustdoc)
     Running `/«BUILDDIR»/rustc-1.17.0+dfsg2/build/bootstrap/debug/rustc --crate-name build_script_build src/librustdoc/build.rs --crate-type bin --emit=dep-info,link -C opt-level=2 -C metadata=115269fc81eeaf48 -C extra-filename=-115269fc81eeaf48 --out-dir '/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/build/rustdoc-115269fc81eeaf48' -L 'dependency=/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/deps' --extern 'build_helper=/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/deps/libbuild_helper-2e1c0ec5e6931b16.rlib' --extern 'gcc=/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/deps/libgcc-4503356c54b13195.rlib'`
     Running `/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/build/rustc_llvm-7c8f3739ac3c0863/build-script-build`
error: failed to run custom build command for `rustc_llvm v0.0.0 (file:///«BUILDDIR»/rustc-1.17.0+dfsg2/src/librustc_llvm)`
process didn't exit successfully: `/«BUILDDIR»/rustc-1.17.0+dfsg2/build/armv7-unknown-linux-gnueabihf/stage1-rustc/release/build/rustc_llvm-7c8f3739ac3c0863/build-script-build` (signal: 4, SIGILL: illegal instruction)
--- stderr
thread panicked while processing panic. aborting.

Build failed, waiting for other jobs to finish...
error: build failed


command did not execute successfully: "/usr/bin/cargo" "build" "-j" "4" "--target" "armv7-unknown-linux-gnueabihf" "-v" "--release" "--frozen" "--features" " jemalloc" "--manifest-path" "/«BUILDDIR»/rustc-1.17.0+dfsg2/src/rustc/Cargo.toml"
expected success, got: exit code: 101

The differences between Debian and Rust LLVM are here but I couldn't see anything that seemed relevant:

$ grep -lri '\barm\b' *.patch
rust-0014-Import-of-fastcomp-commit-4105790f1549808c1f1daa5250.patch
rust-0016-Propagate-DBG_VALUE-entries-when-there-are-unvisited.patch
rust-0017-Teach-LiveDebugValues-about-lexical-scopes.patch
rust-0020-Backport-r285278-ARM-Predicate-UMAAL-selection-on-ha.patch
rust-0025-Add-relocations-for-fixups-fixup_arm_thumb_-br-bcc.patch
rust-0032-Fix-computeKnownBits-for-ARMISD-CMOV.patch

14 is not relevant, 16, 17 are for debuginfo, 20, 25 are for thumb targets not armhf-linux targets. 32 might be relevant but doesn't seem like it could cause a SIGILL.

[parched]

It's 32 I believe. See #41291

[infinity0]

Thanks, after seeing that bug report I'm more convinced. Will rebuild LLVM and confirm.

[infinity0]

That worked, closing.