Linking failure when cross compiling for ARM64 on AMD64

[aurabindo]

Bug Report

Environment

Host: amd64
Target: aarch64-unknown-linux-gnu

Zola version: 14

Step to reproduce

export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=/usr/bin/aarch64-linux-gnu-gcc
cargo build --release --target=aarch64-unknown-linux-gnu --verbose

Error:

   Compiling zola v0.14.0 (/home/daes/git/zola)
     Running `rustc --crate-name zola --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C opt-level=3 -C lto -C codegen-units=1 -C metadata=e61bf94b5c4edab4 -C extra-filename=-e61bf94b5c4edab4 --out-dir /home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps --target aarch64-unknown-linux-gnu -C linker=/usr/bin/aarch64-linux-gnu-gcc -L dependency=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps -L dependency=/home/daes/git/zola/target/release/deps --extern atty=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libatty-8beaa8438e67c42f.rlib --extern chrono=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libchrono-190bc08a3c2a3137.rlib --extern clap=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libclap-44b172aead2a0fa4.rlib --extern ctrlc=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libctrlc-5d0f9fc087aadbca.rlib --extern errors=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/liberrors-6fa92b1a94af5ddf.rlib --extern front_matter=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libfront_matter-7911f48831fe4ee9.rlib --extern globset=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libglobset-3b0d67e8f5a4373c.rlib --extern hyper=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libhyper-f0cfc338fbe8a1bc.rlib --extern lazy_static=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/liblazy_static-9ccf4f30a9e50f28.rlib --extern mime_guess=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libmime_guess-aa2f11bf696ea42e.rlib --extern notify=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libnotify-36e75e5ac2735928.rlib --extern open=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libopen-419377b7d5f1dcdd.rlib --extern percent_encoding=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libpercent_encoding-d9e5ea65a81abd81.rlib --extern relative_path=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/librelative_path-f655ba494cdabb54.rlib --extern search=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libsearch-ccf9afcb30599017.rlib --extern serde_json=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libserde_json-9711dd4b59cb6673.rlib --extern site=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libsite-75ff580d7b761f60.rlib --extern termcolor=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libtermcolor-9cdf49124c0a307b.rlib --extern tokio=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libtokio-980a9c044797f93a.rlib --extern url=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/liburl-ec4a8ab13fbb0e7f.rlib --extern utils=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libutils-5ce44656c65e4cd8.rlib --extern ws=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/libws-bacc24ae5785093c.rlib -L native=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/onig_sys-1b3f9df4a6d1537c/out -L native=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/ring-18a27d3f87f491b3/out -L native=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/libwebp-sys-39d345070046bdc8/out -L native=/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/sass-sys-4da13cf9d4cca085/out/build/lib`
error: linking with `/usr/bin/aarch64-linux-gnu-gcc` failed: exit status: 1
  |
  = note: "/usr/bin/aarch64-linux-gnu-gcc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-Wl,--as-needed" "-L" "/home/daes/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/zola-e61bf94b5c4edab4.zola.1bzlaou2-cgu.0.rcgu.o" "-o" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps/zola-e61bf94b5c4edab4" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-Wl,-O1" "-nodefaultlibs" "-L" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/deps" "-L" "/home/daes/git/zola/target/release/deps" "-L" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/onig_sys-1b3f9df4a6d1537c/out" "-L" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/ring-18a27d3f87f491b3/out" "-L" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/libwebp-sys-39d345070046bdc8/out" "-L" "/home/daes/git/zola/target/aarch64-unknown-linux-gnu/release/build/sass-sys-4da13cf9d4cca085/out/build/lib" "-L" "/home/daes/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/tmp/rustcYmSDfi/liblibwebp_sys-7bf01effd812e655.rlib" "/tmp/rustcYmSDfi/libring-294d111b49accdfc.rlib" "/tmp/rustcYmSDfi/libsass_sys-85794fb30020c0c1.rlib" "/tmp/rustcYmSDfi/libonig_sys-6c23c9b552f5a72e.rlib" "-Wl,--start-group" "-Wl,--end-group" "/home/daes/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib/libcompiler_builtins-8e0dea81c2814a1a.rlib" "-Wl,-Bdynamic" "-lstdc++" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
  = note: /usr/lib/gcc/aarch64-linux-gnu/11.1.0/../../../../aarch64-linux-gnu/bin/ld: /tmp/rustcYmSDfi/libsass_sys-85794fb30020c0c1.rlib(sass_context.o): Relocations in generic ELF (EM: 62)
          /usr/lib/gcc/aarch64-linux-gnu/11.1.0/../../../../aarch64-linux-gnu/bin/ld: /tmp/rustcYmSDfi/libsass_sys-85794fb30020c0c1.rlib(sass_context.o): Relocations in generic ELF (EM: 62)

[Keats]

Eh libsass again..
At this point I would wait for #1535 which will happen probably in the next major version of Zola.
Or if you know how to, I would take a PR to fix https://github.com/compass-rs/sass-rs/blob/master/sass-sys/build.rs in the build process for that arch

[aurabindo]

I was able to fix sass-rs compile individually by overriding the linker for the architecture I want to build via .cargo/config.toml

[target.aarch64-unknown-linux-gnu]
rustflags = [
    "-C", "linker=aarch64-linux-gnu-gcc",
]

However, using the local version of sass-rs with this fix, hyper fails to build, which ended up being due to reqwest not cross compiling because of pkg-config not having the right cross compiling config, owing to openssl directory not being found:

error: failed to run custom build command for `openssl-sys v0.9.65`

Caused by:
  process didn't exit successfully: `/home/daes/git/reqwest/target/release/build/openssl-sys-5870f37698241082/build-script-main` (exit status: 101)
  --- stdout
  cargo:rustc-cfg=const_fn
  cargo:rerun-if-env-changed=AARCH64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR
  AARCH64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
  OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=AARCH64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR
  AARCH64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
  OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=AARCH64_UNKNOWN_LINUX_GNU_OPENSSL_DIR
  AARCH64_UNKNOWN_LINUX_GNU_OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_DIR
  OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS_aarch64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS_aarch64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG_ALLOW_CROSS
  cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS
  cargo:rerun-if-env-changed=PKG_CONFIG_aarch64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_aarch64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_aarch64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_aarch64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
  run pkg_config fail: "pkg-config has not been configured to support cross-compilation.\n\n                Install a sysroot for the target platform and configure it via\n                PKG_CONFIG_SYSROOT_DIR and PKG_CONFIG_PATH, or install a\n                cross-compiling wrapper for pkg-config and set it via\n                PKG_CONFIG environment variable."

  --- stderr
  thread 'main' panicked at '

  Could not find directory of OpenSSL installation, and this `-sys` crate cannot
  proceed without this knowledge. If OpenSSL is installed and this crate had
  trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the
  compilation process.

  Make sure you also have the development packages of openssl installed.
  For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.

  If you're in a situation where you think the directory *should* be found
  automatically, please open a bug at https://github.com/sfackler/rust-openssl
  and include information about your system as well as this message.

  $HOST = x86_64-unknown-linux-gnu
  $TARGET = aarch64-unknown-linux-gnu
  openssl-sys = 0.9.65

[Keats]

Hm where would openssl come from? By default it should use rust-tls everywhere...

[pvonmoradi]

@Keats I think we're having a related issue here: termux/termux-packages#11941

[Keats]

Any idea why openssl is being pulled?

[Keats]

Found in the reqwest README:

Reqwest uses rust-native-tls, which will use the operating system TLS framework if available, meaning Windows and macOS. On Linux, it will use OpenSSL 1.1.