Cross compilation issue (x86_64 → aarch64) with a WIP new package (build_style: cargo)

[dvergeylen]

Hi!

I would like to enrich the support of the Matrix ecosystem in void-linux, alongside the (always up to date) synapse package. I am thus preparing a few template files, namely for:

• matrix-authentication-service (OIDC support for synapse)
• livekit (audio and video callings)
• lk-jwt-service ('bridge' between synapse and livekit)
• authelia (OIDC provider, not specifically linked to matrix use case)

This question is about matrix-authentication-service packaging, where a draft template can be found here.

The template file compiles correctly on native x86_64 and when chrooting to aarch64 (./xbps-src -A aarch64 pkg mas-cli), but doesn't work when cross-compiling to aarch64 (./xbps-src -a aarch64 pkg mas-cli).

The aws-lc-sys crates doesn't compile, for some reason (see error below).
Cross-compiling the rust part (x86_64 → aarch64) manually works (see below, from an ArchLinux distribution).

My understanding is that the rust target seems to be ignored because some CFLAGS are being passed (see this comment) but I don't get why.

I would be more than happy to get some help making the cross-compilation work. I detected aws-lc-rs recently submitted a new release affecting cross compilation to Armv8, so I forked matrix-authentication-service here, updated the crates in Cargo.lock and made a release but this didn't change anything. (I added two commented lines in the template file for anyone willing to test the fork).

Does anyone have any clue on how to solve the issue?

Error when cross compiling from x86_64 → aarch64

$ ./xbps-src -A aarch64 pkg mas-cli
[... redacted ...]
Compiling rustls-native-certs v0.8.1
warning: aws-lc-sys@0.31.0: Environment Variable found 'CFLAGS': '-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.'
warning: aws-lc-sys@0.31.0: Building with: CC
warning: aws-lc-sys@0.31.0: Symbol Prefix: Some("aws_lc_0_31_0")
warning: aws-lc-sys@0.31.0: cc1: error: bad value 'armv8-a' for '-march=' switch
warning: aws-lc-sys@0.31.0: cc1: note: valid arguments to '-march=' switch are: nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids graniterapids-d arrowlake arrowlake-s lunarlake pantherlake bonnell atom silvermont slm goldmont goldmont-plus tremont gracemont sierraforest grandridge clearwaterforest knl knm x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui yongfeng k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 znver5 btver1 btver2 native
warning: aws-lc-sys@0.31.0: Compilation of 'c11.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): LC_ALL=\"C\" \"gcc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-m64\" \"-Werror\" \"-Wno-unused-parameter\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-O2\" \"-o\" \"/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/out-c11/7dfda64fdf5a526c-c11.o\" \"-c\" \"/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/c11.c\"" }).
warning: aws-lc-sys@0.31.0: Environment Variable found 'CC': 'aarch64-linux-gnu-gcc'
warning: aws-lc-sys@0.31.0: Setting CC_x86_64_unknown_linux_gnu: aarch64-linux-gnu-gcc
warning: aws-lc-sys@0.31.0: Environment Variable found 'CXX': 'aarch64-linux-gnu-c++'
warning: aws-lc-sys@0.31.0: Setting CXX_x86_64_unknown_linux_gnu: aarch64-linux-gnu-c++
warning: aws-lc-sys@0.31.0: Setting CFLAGS_x86_64_unknown_linux_gnu: -fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.
warning: aws-lc-sys@0.31.0: aarch64-linux-gnu-gcc: error: unrecognized command-line option '-m64'
warning: aws-lc-sys@0.31.0: Compilation of 'stdalign_check.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): LC_ALL=\"C\" \"aarch64-linux-gnu-gcc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-m64\" \"-Werror\" \"-Wno-unused-parameter\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-O2\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-o\" \"/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/out-stdalign_check/7dfda64fdf5a526c-stdalign_check.o\" \"-c\" \"/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/stdalign_check.c\"" }).
warning: aws-lc-sys@0.31.0: aarch64-linux-gnu-gcc: error: unrecognized command-line option '-m64'
warning: aws-lc-sys@0.31.0: Compilation of 'builtin_swap_check.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): LC_ALL=\"C\" \"aarch64-linux-gnu-gcc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-m64\" \"-Werror\" \"-Wno-unused-parameter\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-O2\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-o\" \"/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/out-builtin_swap_check/7dfda64fdf5a526c-builtin_swap_check.o\" \"-c\" \"/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/builtin_swap_check.c\"" }).
error: failed to run custom build command for 'aws-lc-sys v0.31.0'

Caused by:
  process didn't exit successfully: '/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-bb85dc70f3ebf01d/build-script-main' (exit status: 101)
  --- stdout
  cargo:rerun-if-env-changed=AWS_LC_SYS_NO_PREFIX_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_NO_PREFIX
  cargo:rerun-if-env-changed=AWS_LC_SYS_PREGENERATING_BINDINGS_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_PREGENERATING_BINDINGS
  cargo:rerun-if-env-changed=AWS_LC_SYS_EXTERNAL_BINDGEN_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_EXTERNAL_BINDGEN
  cargo:rerun-if-env-changed=AWS_LC_SYS_NO_ASM_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_NO_ASM
  cargo:rerun-if-env-changed=AWS_LC_SYS_CFLAGS_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_CFLAGS
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=CFLAGS
  cargo:warning=Environment Variable found 'CFLAGS': '-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.'
  cargo:rerun-if-env-changed=AWS_LC_SYS_PREBUILT_NASM_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_PREBUILT_NASM
  cargo:rerun-if-env-changed=AWS_LC_SYS_C_STD_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_C_STD
  cargo:rerun-if-env-changed=AWS_LC_SYS_CMAKE_BUILDER_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_CMAKE_BUILDER
  cargo:rerun-if-env-changed=AWS_LC_SYS_NO_PREGENERATED_SRC_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_NO_PREGENERATED_SRC
  cargo:rerun-if-env-changed=AWS_LC_SYS_EFFECTIVE_TARGET_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_EFFECTIVE_TARGET
  cargo:rustc-cfg=x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_STATIC_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_STATIC
  default_for Target: 'x86_64-unknown-linux-gnu'
  cargo:rerun-if-env-changed=CARGO_FEATURE_SSL
  cargo:warning=Building with: CC
  cargo:warning=Symbol Prefix: Some("aws_lc_0_31_0")
  default_for Target: 'x86_64-unknown-linux-gnu'
  cargo:rerun-if-env-changed=CARGO_FEATURE_SSL
  cargo:root=/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out
  default_for Target: 'x86_64-unknown-linux-gnu'
  OPT_LEVEL = Some(0)
  OUT_DIR = Some(/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out)
  TARGET = Some(x86_64-unknown-linux-gnu)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CC
  HOST_CC = Some(gcc)
  cargo:rerun-if-env-changed=CC_KNOWN_WRAPPER_CUSTOM
  CC_KNOWN_WRAPPER_CUSTOM = None
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(false)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CC_SHELL_ESCAPED_FLAGS
  CC_SHELL_ESCAPED_FLAGS = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = Some(-O2)
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  CARGO_ENCODED_RUSTFLAGS = Some()
  OPT_LEVEL = Some(0)
  TARGET = Some(x86_64-unknown-linux-gnu)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CC
  HOST_CC = Some(gcc)
  cargo:rerun-if-env-changed=CC_KNOWN_WRAPPER_CUSTOM
  CC_KNOWN_WRAPPER_CUSTOM = None
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(false)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CC_SHELL_ESCAPED_FLAGS
  CC_SHELL_ESCAPED_FLAGS = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = Some(-O2)
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  CARGO_ENCODED_RUSTFLAGS = Some()
  cargo:warning=cc1: error: bad value 'armv8-a' for '-march=' switch
  cargo:warning=cc1: note: valid arguments to '-march=' switch are: nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids graniterapids-d arrowlake arrowlake-s lunarlake pantherlake bonnell atom silvermont slm goldmont goldmont-plus tremont gracemont sierraforest grandridge clearwaterforest knl knm x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui yongfeng k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 znver5 btver1 btver2 native
  cargo:warning=Compilation of 'c11.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): LC_ALL=\"C\" \"gcc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-m64\" \"-Werror\" \"-Wno-unused-parameter\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-O2\" \"-o\" \"/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/out-c11/7dfda64fdf5a526c-c11.o\" \"-c\" \"/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/c11.c\"" }).
  cargo:rerun-if-env-changed=AWS_LC_SYS_CC_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_CC
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=CC
  cargo:warning=Environment Variable found 'CC': 'aarch64-linux-gnu-gcc'
  cargo:warning=Setting CC_x86_64_unknown_linux_gnu: aarch64-linux-gnu-gcc
  cargo:rerun-if-env-changed=AWS_LC_SYS_CXX_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=AWS_LC_SYS_CXX
  cargo:rerun-if-env-changed=CXX_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=CXX
  cargo:warning=Environment Variable found 'CXX': 'aarch64-linux-gnu-c++'
  cargo:warning=Setting CXX_x86_64_unknown_linux_gnu: aarch64-linux-gnu-c++
  cargo:warning=Setting CFLAGS_x86_64_unknown_linux_gnu: -fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.
  OPT_LEVEL = Some(0)
  TARGET = Some(x86_64-unknown-linux-gnu)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = Some(aarch64-linux-gnu-gcc)
  cargo:rerun-if-env-changed=CC_KNOWN_WRAPPER_CUSTOM
  CC_KNOWN_WRAPPER_CUSTOM = None
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(false)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CC_SHELL_ESCAPED_FLAGS
  CC_SHELL_ESCAPED_FLAGS = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = Some(-O2)
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  CARGO_ENCODED_RUSTFLAGS = Some()
  cargo:warning=aarch64-linux-gnu-gcc: error: unrecognized command-line option '-m64'
  cargo:warning=Compilation of 'stdalign_check.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): LC_ALL=\"C\" \"aarch64-linux-gnu-gcc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-m64\" \"-Werror\" \"-Wno-unused-parameter\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-O2\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-o\" \"/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/out-stdalign_check/7dfda64fdf5a526c-stdalign_check.o\" \"-c\" \"/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/stdalign_check.c\"" }).
  OPT_LEVEL = Some(0)
  TARGET = Some(x86_64-unknown-linux-gnu)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = Some(aarch64-linux-gnu-gcc)
  cargo:rerun-if-env-changed=CC_KNOWN_WRAPPER_CUSTOM
  CC_KNOWN_WRAPPER_CUSTOM = None
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(false)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CC_SHELL_ESCAPED_FLAGS
  CC_SHELL_ESCAPED_FLAGS = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = Some(-O2)
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  CARGO_ENCODED_RUSTFLAGS = Some()
  cargo:warning=aarch64-linux-gnu-gcc: error: unrecognized command-line option '-m64'
  cargo:warning=Compilation of 'builtin_swap_check.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): LC_ALL=\"C\" \"aarch64-linux-gnu-gcc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-m64\" \"-Werror\" \"-Wno-unused-parameter\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-O2\" \"-fstack-clash-protection\" \"-D_FORTIFY_SOURCE=2\" \"-O2\" \"-pipe\" \"-march=armv8-a\" \"-I/usr/aarch64-linux-gnu/usr/include\" \"-ffile-prefix-map=/builddir/mas-cli-1.5.0=.\" \"-o\" \"/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/out-builtin_swap_check/7dfda64fdf5a526c-builtin_swap_check.o\" \"-c\" \"/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/builtin_swap_check.c\"" }).
  OPT_LEVEL = Some(0)
  OUT_DIR = Some(/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out)
  TARGET = Some(x86_64-unknown-linux-gnu)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = Some(aarch64-linux-gnu-gcc)
  cargo:rerun-if-env-changed=CC_KNOWN_WRAPPER_CUSTOM
  CC_KNOWN_WRAPPER_CUSTOM = None
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(false)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CC_SHELL_ESCAPED_FLAGS
  CC_SHELL_ESCAPED_FLAGS = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = Some(-O2)
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = Some(-fstack-clash-protection -D_FORTIFY_SOURCE=2 -O2 -pipe -march=armv8-a   -I/usr/aarch64-linux-gnu/usr/include -ffile-prefix-map=/builddir/mas-cli-1.5.0=.)
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  CARGO_ENCODED_RUSTFLAGS = Some()

  --- stderr

  thread 'main' panicked at /host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/builder/cc_builder.rs:495:9:
  COMPILER: aarch64-linux-gnu-gccARGS: ["-O0", "-ffunction-sections", "-fdata-sections", "-fPIC", "-m64", "-fstack-clash-protection", "-D_FORTIFY_SOURCE=2", "-O2", "-pipe", "-march=armv8-a", "-I/usr/aarch64-linux-gnu/usr/include", "-ffile-prefix-map=/builddir/mas-cli-1.5.0=.", "-O2", "-fstack-clash-protection", "-D_FORTIFY_SOURCE=2", "-O2", "-pipe", "-march=armv8-a", "-I/usr/aarch64-linux-gnu/usr/include", "-ffile-prefix-map=/builddir/mas-cli-1.5.0=.", "/host/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.31.0/aws-lc/tests/compiler_features_tests/memcmp_invalid_stripped_check.c", "-Wno-unused-parameter", "-o", "/builddir/mas-cli-1.5.0/target/release/build/aws-lc-sys-10e10da35ab03f2c/out/memcmp_invalid_stripped_check"]EXECUTED: trueERROR: aarch64-linux-gnu-gcc: error: unrecognized command-line option '-m64'
  OUTPUT: Failed to compile memcmp_invalid_stripped_check
              
  note: run with 'RUST_BACKTRACE=1' environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
=> ERROR: mas-cli-1.5.0_1: do_build: '${make_cmd} build --release --locked --target ${RUST_TARGET} ${configure_args} ${make_build_args}' exited with 101
=> ERROR:   in do_build() at common/build-style/cargo.sh:8

Manual cross compilation commands

# Installing packages
sudo pacman -S rustup aarch64-linux-gnu-gcc aarch64-linux-gnu-binutils aarch64-linux-gnu-glibc

# Setting up Rustup
rustup default stable
rustup target add  aarch64-unknown-linux-gnu

# Building
git clone --recurse-submodules https://github.com/aws/aws-lc-rs
cd aws-lc-rs
export CARGO_TARGET_UNKNOWN_LINUX_GNU_LINKER=/usr/bin/aarch64-linux-gnu-gcc
cargo build --release --locked --target aarch64-unknown-linux-gnu