Build fails on armv6

[martinbrook]

Any chance to detect armv6 and add -DOPENSSL_NO_ASM?

Running with gitlab-ci-multi-runner 9.0.1 (a3da309)
on docker-auto-scale (4e4528ca)
Using Docker executor with image ethcore/rust-armv6:latest ...
Using docker image sha256:1576be0f294d429cb79e08ab536f8d785bb2ac06802f2e2c0b2e950079b6b2e2 ID=sha256:1576be0f294d429cb79e08ab536f8d785bb2ac06802f2e2c0b2e950079b6b2e2 for predefined container...
Pulling docker image ethcore/rust-armv6:latest ...
Using docker image ethcore/rust-armv6:latest ID=sha256:9940d33bf5fa7e73373785ac43d7edc2ff5f13a7e5ea76585ec5457326d01e7b for build container...
Running on runner-4e4528ca-project-3122475-concurrent-0 via runner-4e4528ca-machine-1492431847-e9a7547d-digital-ocean-2gb...
Cloning repository for vgrade with git depth set to 3...
Cloning into '/builds/vgrade/parity'...
Checking out 250f7e72 as vgrade...
Skipping Git submodules setup
Checking cache for build/vgrade...
Successfully extracted cache
$ export CC=arm-linux-gnueabi-gcc
$ export CXX=arm-linux-gnueabi-g++
$ export HOST_CC=gcc
$ export HOST_CXX=g++
$ export PLATFORM=arm-unknown-linux-gnueabi
$ export OPENSSL_NO_ASM
$ rm -rf .cargo
$ mkdir -p .cargo
$ echo "[target.$PLATFORM]" >> .cargo/config
$ echo "linker= "arm-linux-gnueabi-gcc"" >> .cargo/config
$ cat .cargo/config
[target.arm-unknown-linux-gnueabi]
linker= "arm-linux-gnueabi-gcc"
$ cargo build -j $(nproc) --target $PLATFORM --features final --release $CARGOFLAGS
Updating registry https://github.com/rust-lang/crates.io-index
Updating git repository https://github.com/ethcore/rust-ctrlc.git
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Compiling term v0.4.5
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Compiling owning_ref v0.2.2
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Compiling cfg-if v0.1.0
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Compiling ethcore-bloom-journal v0.1.0 (file:///builds/vgrade/parity/util/bloom)
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Compiling hamming v0.1.3
Compiling sha1 v0.2.0
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Compiling slab v0.2.0 (https://github.com/carllerche/slab?rev=5476efcafb#5476efca)
Compiling bit-vec v0.4.3
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Compiling semver v0.1.20
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Compiling using_queue v0.1.0 (file:///builds/vgrade/parity/util/using_queue)
Compiling httparse v1.1.2
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Compiling nix v0.6.0
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Compiling strsim v0.3.0
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Compiling typeable v0.1.2
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Compiling table v0.1.0 (file:///builds/vgrade/parity/util/table)
Compiling bit-set v0.4.0
Compiling stable-heap v0.1.0 (https://github.com/carllerche/stable-heap?rev=3c5cd1ca47#3c5cd1ca)
Compiling bytes v0.4.0-dev (https://github.com/carllerche/bytes#6529f639)
Compiling unicode-normalization v0.1.2
Compiling take v0.1.0
Compiling ethcore-signer v1.6.0 (file:///builds/vgrade/parity/signer)
Compiling hyper v0.10.4
Compiling ansi_term v0.7.2
Compiling openssl v0.9.3
Compiling bitflags v0.5.0
Compiling slab v0.3.0
Compiling odds v0.2.12
Compiling heapsize v0.3.6
Compiling nodrop v0.1.6
Compiling arrayvec v0.3.16
Compiling ethcore-light v1.6.0 (file:///builds/vgrade/parity/ethcore/light)
Compiling antidote v1.0.0
Compiling log v0.3.6
Compiling mime v0.2.0
Compiling dtoa v0.4.0
Compiling regex-syntax v0.3.1
Compiling toml v0.2.0
Compiling phf_shared v0.7.14
Compiling bitflags v0.4.0
Compiling phf v0.7.14
Compiling primal-bit v0.2.3
Compiling futures v0.1.10
Compiling hpack v0.2.0
Compiling solicit v0.4.4
Compiling tokio-service v0.1.0
Compiling num-iter v0.1.32
Compiling ring v0.7.1
Compiling num-complex v0.1.32
Compiling lazy_static v0.2.1
Compiling stats v0.1.0 (file:///builds/vgrade/parity/util/stats)
Compiling pkg-config v0.3.8
Compiling openssl-sys v0.9.3
Compiling winapi-build v0.1.1
Compiling ws2_32-sys v0.2.1
Compiling vecio v0.1.0
Compiling quote v0.3.10
Compiling target_info v0.1.0
Compiling podio v0.1.5
Compiling nix v0.7.0
Compiling untrusted v0.3.2
Compiling bigint v1.0.0
Compiling bloomchain v0.1.0
error: failed to run custom build command for ring v0.7.1
process didn't exit successfully: /builds/vgrade/parity/target/release/build/ring-5f9a5456e1949b66/build-script-build (exit code: 101)
--- stdout
CI_PROJECT_NAME: parity
CI_REGISTRY: registry.gitlab.com
CI_BUILD_TOKEN: xxxxxxxxxxxxxxxxxxxx
HOSTNAME: runner-4e4528ca-project-3122475-concurrent-0
CI_PROJECT_URL: https://gitlab.com/vgrade/parity
RUST_TARGETS: arm-unknown-linux-gnueabi
CI_REGISTRY_USER: gitlab-ci-token
CI_BUILD_BEFORE_SHA: 250f7e72d37bbbb77a1866001daf4a8a4a5a453b
CI_SERVER_VERSION: 9.1.0-rc2-ee
CI_BUILD_ID: 14459071
OLDPWD: /
GITLAB_USER_EMAIL: martin.brook100@googlemail.com
RUST_BACKTRACE: 1
CI_COMMIT_REF_NAME: vgrade
CI_JOB_TOKEN: xxxxxxxxxxxxxxxxxxxx
CI_PROJECT_ID: 3122475
CI_RUNNER_ID: 40788
SIMPLECOV: true
CI_PIPELINE_ID: 7680857
CI_BUILD_REF_NAME: vgrade
CI_BUILD_REF: 250f7e72d37bbbb77a1866001daf4a8a4a5a453b
CI_COMMIT_REF_SLUG: vgrade
CI_REPOSITORY_URL: https://gitlab-ci-token:xxxxxxxxxxxxxxxxxxxx@gitlab.com/vgrade/parity.git
PATH: /root/.cargo/bin:/root/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
CI_BUILD_STAGE: build
CI_PROJECT_DIR: /builds/vgrade/parity
CI_REGISTRY_PASSWORD: xxxxxxxxxxxxxxxxxxxx
CI_RUNNER_TAGS: git-annex, mongo, postgres, mysql, ruby, linux, docker, shared
CI_REGISTRY_IMAGE: registry.gitlab.com/vgrade/parity
PWD: /builds/vgrade/parity
CI_DEBUG_TRACE: false
RUSTFLAGS:
CI_JOB_STAGE: build
CI_SERVER_NAME: GitLab
CI_PROJECT_PATH: vgrade/parity
CARGOFLAGS:
GITLAB_CI: true
PLATFORM: arm-unknown-linux-gnueabi
CI_SERVER_REVISION: 79c4eaa
CXX: arm-linux-gnueabi-g++
CI_COMMIT_SHA: 250f7e72d37bbbb77a1866001daf4a8a4a5a453b
SHLVL: 1
CI_BUILD_NAME: linux-armv6
HOME: /root
CI_SERVER: yes
CI: true
CI_PROJECT_NAMESPACE: vgrade
TARGET: arm-unknown-linux-gnueabi
HOST_CXX: g++
GIT_DEPTH: 3
OPENSSL_DIR: /root/openssl
CI_BUILD_REF_SLUG: vgrade
CI_BUILD_REPO: https://gitlab-ci-token:xxxxxxxxxxxxxxxxxxxx@gitlab.com/vgrade/parity.git
CC: arm-linux-gnueabi-gcc
CI_RUNNER_DESCRIPTION: shared-runners-manager-2.gitlab.com
GITLAB_USER_ID: 603017
CI_JOB_ID: 14459071
CI_JOB_NAME: linux-armv6
HOST_CC: gcc
_: /root/.cargo/bin/cargo
LD_LIBRARY_PATH: /builds/vgrade/parity/target/release/deps:/root/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib
CARGO_HOME: /root/.cargo
RUST_RECURSION_COUNT: 1
RUSTUP_TOOLCHAIN: stable-x86_64-unknown-linux-gnu
RUSTUP_HOME: /root/.rustup
SSL_CERT_FILE: /usr/lib/ssl/certs/ca-certificates.crt
SSL_CERT_DIR: /usr/lib/ssl/certs
CARGO_CFG_DEBUG_ASSERTIONS:
RUSTC: rustc
CARGO_PKG_VERSION: 0.7.1
CARGO_PKG_DESCRIPTION: Safe, fast, small crypto using Rust.
CARGO_CFG_TARGET_ARCH: arm
NUM_JOBS: 2
CARGO_FEATURE_DEV_URANDOM_FALLBACK: 1
OUT_DIR: /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out
CARGO_PKG_AUTHORS: Brian Smith brian@briansmith.org
PROFILE: release
CARGO_CFG_TARGET_ENV: gnu
CARGO_PKG_NAME: ring
CARGO_CFG_TARGET_ENDIAN: little
OPT_LEVEL: 3
CARGO_CFG_TARGET_OS: linux
CARGO_PKG_VERSION_MINOR: 7
CARGO_PKG_VERSION_PRE:
DEBUG: false
CARGO_CFG_TARGET_FAMILY: unix
CARGO_CFG_PROC_MACRO:
CARGO_CFG_TARGET_POINTER_WIDTH: 32
CARGO_FEATURE_DEFAULT: 1
CARGO_CFG_UNIX:
CARGO_PKG_VERSION_PATCH: 1
CARGO_FEATURE_USE_HEAP: 1
RUSTDOC: rustdoc
HOST: x86_64-unknown-linux-gnu
CARGO_MANIFEST_DIR: /root/.cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.7.1
CARGO_PKG_VERSION_MAJOR: 0
CARGO_PKG_HOMEPAGE:
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/lib
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/chacha/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/cipher
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/curve25519
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/curve25519/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/ec
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/ec/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/limbs
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/modes
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/modes/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/poly1305/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/rand
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/sha/asm
mkdir -p /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/test
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes/aes.o crypto/aes/aes.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/add.o crypto/bn/add.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/bn.o crypto/bn/bn.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/cmp.o crypto/bn/cmp.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/convert.o crypto/bn/convert.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/div.o crypto/bn/div.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/exponentiation.o crypto/bn/exponentiation.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/gcd.o crypto/bn/gcd.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/generic.o crypto/bn/generic.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/montgomery.o crypto/bn/montgomery.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/montgomery_inv.o crypto/bn/montgomery_inv.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/mul.o crypto/bn/mul.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/random.o crypto/bn/random.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/shift.o crypto/bn/shift.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/cipher/e_aes.o crypto/cipher/e_aes.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/crypto.o crypto/crypto.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/curve25519/curve25519.o crypto/curve25519/curve25519.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/ec/ecp_nistz.o crypto/ec/ecp_nistz.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/ec/ecp_nistz256.o crypto/ec/ecp_nistz256.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/ec/gfp_p256.o crypto/ec/gfp_p256.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/ec/gfp_p384.o crypto/ec/gfp_p384.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/limbs/limbs.o crypto/limbs/limbs.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/mem.o crypto/mem.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/modes/gcm.o crypto/modes/gcm.c
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/rand/sysrand.o crypto/rand/sysrand.c
perl crypto/aes/asm/aes-armv4.pl linux32 /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes/asm/aes-armv4.S
perl crypto/aes/asm/bsaes-armv7.pl linux32 /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes/asm/bsaes-armv7.S
perl crypto/bn/asm/armv4-mont.pl linux32 /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/asm/armv4-mont.S
perl crypto/chacha/asm/chacha-armv4.pl linux32 /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/chacha/asm/chacha-armv4.S
arm-linux-gnueabi-gcc -std=c1x -Wbad-function-cast -Wmissing-field-initializers -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -fpic -fdata-sections -ffunction-sections -g3 -pedantic -pedantic-errors -Wall -Werror -Wextra -Wcast-align -Wcast-qual -Wenum-compare -Wfloat-equal -Wformat=2 -Winline -Winvalid-pch -Wmissing-declarations -Wmissing-field-initializers -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-compare -Wundef -Wuninitialized -Wwrite-strings -fstack-protector -DNDEBUG -O3 -MMD -Iinclude -D_XOPEN_SOURCE=700 -DBORINGSSL_IMPLEMENTATION -fno-strict-aliasing -fvisibility=hidden -Wno-cast-align -c -o /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/curve25519/asm/x25519-asm-arm.o crypto/curve25519/asm/x25519-asm-arm.S
rm /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/bn/asm/armv4-mont.S /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/chacha/asm/chacha-armv4.S /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes/asm/bsaes-armv7.S /builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/aes/asm/aes-armv4.S

--- stderr
crypto/curve25519/asm/x25519-asm-arm.S: Assembler messages:
crypto/curve25519/asm/x25519-asm-arm.S:44: Error: selected processor does not support ARM mode strd r4,[sp,#0]' crypto/curve25519/asm/x25519-asm-arm.S:45: Error: selected processor does not support ARM mode strd r6,[sp,#8]'
crypto/curve25519/asm/x25519-asm-arm.S:46: Error: selected processor does not support ARM mode strd r8,[sp,#16]' crypto/curve25519/asm/x25519-asm-arm.S:47: Error: selected processor does not support ARM mode strd r10,[sp,#24]'
crypto/curve25519/asm/x25519-asm-arm.S:2121: Error: selected processor does not support ARM mode ldrd r4,[sp,#0]' crypto/curve25519/asm/x25519-asm-arm.S:2122: Error: selected processor does not support ARM mode ldrd r6,[sp,#8]'
crypto/curve25519/asm/x25519-asm-arm.S:2123: Error: selected processor does not support ARM mode ldrd r8,[sp,#16]' crypto/curve25519/asm/x25519-asm-arm.S:2124: Error: selected processor does not support ARM mode ldrd r10,[sp,#24]'
make: *** [/builds/vgrade/parity/target/arm-unknown-linux-gnueabi/release/build/ring-da1300bcca9312e9/out/obj/crypto/curve25519/asm/x25519-asm-arm.o] Error 1

[briansmith]

Maybe a (temporary) solution is to just avoid using x25519-asm-arm.S on ARM earlier than ARMv7, falling back to the C implementation.

What ARMv6 thing are you targeting? I didn't realize anybody was trying to use ring with ARMv6 stuff.

[martinbrook]

Raspberry Pi Zero, I'll take a look at a fallback

[briansmith]

@martinbrook Ping? Did you have any success at implementing the fallback? Also, can you provide the exact --target you are using?

[jamesmunns]

@briansmith I also just ran into this with the ARMv5te architecture, however I am using Japaric's cross tool (as the current mainline rust armv5te target is broken due to atomic width issues).

I am attempting to build the dev branch of rocket, which depends on cookie, which depends on ring.

Here are the errors I get:

--- stderr
crypto/curve25519/asm/x25519-asm-arm.S: Assembler messages:
crypto/curve25519/asm/x25519-asm-arm.S:44: Error: selected processor does not support ARM mode `strd r4,[sp,#0]'
crypto/curve25519/asm/x25519-asm-arm.S:45: Error: selected processor does not support ARM mode `strd r6,[sp,#8]'
crypto/curve25519/asm/x25519-asm-arm.S:46: Error: selected processor does not support ARM mode `strd r8,[sp,#16]'
crypto/curve25519/asm/x25519-asm-arm.S:47: Error: selected processor does not support ARM mode `strd r10,[sp,#24]'
crypto/curve25519/asm/x25519-asm-arm.S:2121: Error: selected processor does not support ARM mode `ldrd r4,[sp,#0]'
crypto/curve25519/asm/x25519-asm-arm.S:2122: Error: selected processor does not support ARM mode `ldrd r6,[sp,#8]'
crypto/curve25519/asm/x25519-asm-arm.S:2123: Error: selected processor does not support ARM mode `ldrd r8,[sp,#16]'
crypto/curve25519/asm/x25519-asm-arm.S:2124: Error: selected processor does not support ARM mode `ldrd r10,[sp,#24]'
thread '<unnamed>' panicked at 'execution failed', /cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.11.0/build.rs:658:8
note: Run with `RUST_BACKTRACE=1` for a backtrace.
/cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.11.0/pregenerated/sha256-armv4-linux32.S: Assembler messages:
/cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.11.0/pregenerated/sha256-armv4-linux32.S:1881: Error: invalid constant (ffffffffffffef60) after fixup
thread '<unnamed>' panicked at 'execution failed', /cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.11.0/build.rs:658:8

I did also find another crypto library which ran into (what looks like) a similar issue: libressl/portable#41

Specifically the LLVM triple for my arch is armv5te-unknown-linux-gnueabi, and the GCC triple for my arch is armel-unknown-linux-gnueabi. Please let me know if I can provide any other helpful information.

[jamesmunns]

Following up, I believe that both ARMv5te and ARMv6 have support for these doubleword operations LDRD and STRD. From the compile/assembler output, it seems that they are instead reporting to the makefiles that they are ARMv4 target (normally this is fine, as lower numbers are a good "common denominator". It looks like there are three good options here:

1. Force *ring* to use the C definition for these targets
2. Patch the assembly to use other instructions LDRM and STRM, or maybe just two LDR and STR. This would be implemented one of two ways:
   • 2a: Split the file to "v4+" and "v5+" versions
   • 2b: Only support "v4+" (overwrite the existing file)
3. Correct the target specification to the lowest supported target (ARMv5te, from what I can tell).

I will be investigating option 3, since touching assembly always makes me cautious (I'm sure whoever wrote this has a better idea than I do), and option 1 seems unnecessary if this is just a build option problem. I am definitely open to ideas if you have any.

For reference, these pages back up what I said above regarding doubleword instructions:

• ARMv4T Key Features
• ARMv5TE Key Features
• ARMv6 Key Features

[jamesmunns]

Actually, I found an option number 4.

-march=... is never specified in any of the *ring* makefiles as far as I can find. I was able to get the build working successfully by setting the following environment variable:

CFLAGS_armel_unknown_linux_gnueabi="-march=armv5te -Wall -Os -fPIC -D__arm__ -mfloat-abi=soft" (note: the other arguments were already there for me, your mileage may vary).

I believe without specific -march guidance, this version of arm-linux-gnueabi-gcc defaults to the lowest common denominator, armv4, which does not support these doubleword instructions.

@briansmith I'm not sure the correct way to move forward, and would appreciate your input. On one hand, this is probably considered a workaround, and I'm not sure if it is ring's job (via its build.rs) to accurately detect the target and tune the CFLAGS accordingly. However, as *ring* becomes more common (as well as Rust on older linux/arm targets), it may be cumbersome to deal with people wondering why *ring* isn't working for them. I'm happy to do any legwork, however I am unsure what makes sense for *ring* here.

@martinbrook you might want to try adding CFLAGS_arm_unknown_linux_gnueabi="-march=armv6" to your environment variables. As a note, armv6 is the lowest common denominator, according to the gcc manpages you have the choice of ‘armv6’, ‘armv6j’, ‘armv6k’, ‘armv6kz’, ‘armv6t2’, ‘armv6z’, ‘armv6zk’, but armv6 is a safe bet here.

[briansmith]

@briansmith I'm not sure the correct way to move forward, and would appreciate your input.

Sorry this got lost.

x25519-asm-arm.S only contains NEON code. So if the target won't have NEON support at all (because it's armv5 or armv6) then we shouldn't even try to build x25519-asm-arm.S. However, I don't know, in build.rs, how to tell the difference between an ARM target that definitely won't have NEON from one that might have NEON. Help?

[pietro]

I think if the target string starts with armv7 it might have NEON. All other 32-bit targets won't, maybe except for arm-linux-androideabi, but I think we can either ignore it or tell people to use armv7-linux-androideabi, which since API 23 will have NEON.

[briansmith]

Will ARMv6 binaries run on ARMv7 unmodified? My understanding is that OpenSSL's assembly language code is written for ARMv4 (!) and up, and then it does runtime feature detection to see if NEON is available.

In other words, even if the target isn't an "armv7" or "thumbv7" target, the program might be run on an ARMv7 machine that has NEON.

[briansmith]

strd r4,[sp,#0]' crypto/curve25519/asm/x25519-asm-arm.S:45: Error: selected processor does not support ARM mode strd r6,[sp,#8]'

This seems to be the same problem as #813, so I'm closing this as a duplicate of that.