cargo build --target=aarch64-unknown-fuchsia

[wfxxy]

Hi owner,
when cargo build --target=aarch64-unknown-fuchsia
some error occur,how to resolve this question?

build error log:
Compiling libc v0.2.155
Compiling foreign-types-shared v0.1.1
Compiling cfg-if v1.0.0
Compiling bitflags v2.5.0
Compiling once_cell v1.19.0
Compiling openssl-sys v0.9.102
Compiling openssl-macros v0.1.1
error: failed to run custom build command for openssl-sys v0.9.102

Caused by:
process didn't exit successfully: openssl/target/debug/build/openssl-sys-908aa9a24708f521/build-script-main (exit status: 101)
--- stdout
cargo:rerun-if-env-changed=AARCH64_UNKNOWN_FUCHSIA_OPENSSL_LIB_DIR
AARCH64_UNKNOWN_FUCHSIA_OPENSSL_LIB_DIR unset
cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
OPENSSL_LIB_DIR unset
cargo:rerun-if-env-changed=AARCH64_UNKNOWN_FUCHSIA_OPENSSL_INCLUDE_DIR
AARCH64_UNKNOWN_FUCHSIA_OPENSSL_INCLUDE_DIR unset
cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
OPENSSL_INCLUDE_DIR unset
cargo:rerun-if-env-changed=AARCH64_UNKNOWN_FUCHSIA_OPENSSL_DIR
AARCH64_UNKNOWN_FUCHSIA_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-fuchsia
cargo:rerun-if-env-changed=PKG_CONFIG_ALLOW_CROSS_aarch64_unknown_fuchsia
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-fuchsia
cargo:rerun-if-env-changed=PKG_CONFIG_aarch64_unknown_fuchsia
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-fuchsia
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_aarch64_unknown_fuchsia
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.

Install a sysroot for the target platform and configure it via
PKG_CONFIG_SYSROOT_DIR and PKG_CONFIG_PATH, or install a
cross-compiling wrapper for pkg-config and set it via
PKG_CONFIG environment variable.

--- stderr
thread 'main' panicked at openssl/vendor/openssl-sys/build/find_normal.rs:190:5:

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-fuchsia
openssl-sys = 0.9.102

note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...

[Skepfyr]

How are you expecting this to work? It looks like you're trying to cross-compile from x86 Linux to aarch64 Fuchsia? You need a version of OpenSSL to link to. Unfortunately I don't think openssl-src supports Fuchsia, so I think you'll need to do one of:

1. Add support for Fuchsia to openssl-src, allowing you to use that to build OpenSSL and then you can use the vendored feature
2. Obtain a version of OpenSSL for AArch64 Fuchsia and configure pkg-config for cross compilation https://docs.rs/pkg-config/latest/pkg_config/#cross-compilation
3. Cross-compile OpenSSL yourself and configure the openssl crate to use that https://docs.rs/openssl/latest/openssl/#manual