pkg-config reports missing dependencies

[oswald2]

Hi,

I am trying to cross compile to a Raspberry Pi Zero 2 W with help of cross. I need some system dependencies, so the current Cross.toml file is like this:

[target.aarch64-unknown-linux-gnu]
image = "ghcr.io/cross-rs/aarch64-unknown-linux-gnu:main"
pre-build = [
    "dpkg --add-architecture $CROSS_DEB_ARCH",
    "apt-get update",
    "apt-get install --assume-yes libdbus-1-dev:$CROSS_DEB_ARCH pkg-config:$CROSS_DEB_ARCH"
]

But then on compilation, the libdbus-sys crate reports:

error: failed to run custom build command for `libdbus-sys v0.2.5`

Caused by:
  process didn't exit successfully: `/target/release/build/libdbus-sys-6d49800a54e2f33f/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-changed=build.rs
  cargo:rerun-if-changed=build_vendored.rs
  cargo:rerun-if-env-changed=DBUS_1_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=DBUS_1_STATIC
  cargo:rerun-if-env-changed=DBUS_1_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
  cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_aarch64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_aarch64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_aarch64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_aarch64_unknown_linux_gnu
  cargo:rerun-if-env-changed=TARGET_PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
  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

  --- stderr
  pkg_config failed: 
  pkg-config exited with status code 1
  > PKG_CONFIG_PATH=/usr/lib/aarch64-linux-gnu/pkgconfig/: PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 pkg-config --libs --cflags dbus-1 dbus-1 >= 1.6

  The system library `dbus-1` required by crate `libdbus-sys` was not found.
  The file `dbus-1.pc` needs to be installed and the PKG_CONFIG_PATH environment variable must contain its parent directory.
  PKG_CONFIG_PATH contains the following:
      - /usr/lib/aarch64-linux-gnu/pkgconfig/
      - 

  HINT: you may need to install a package such as dbus-1, dbus-1-dev or dbus-1-devel.

  One possible solution is to check whether packages
  'libdbus-1-dev' and 'pkg-config' are installed:
  On Ubuntu:
  sudo apt install libdbus-1-dev pkg-config
  On Fedora:
  sudo dnf install dbus-devel pkgconf-pkg-config

So it can't find the libdbus, although there is the pre-build to install it.

I am obviously doing something wrong, so what am I missing here?

[Emilgardis]

what version of cross are you using? Can you try to install the version from the main branch?

cargo install cross --git https://github.com/cross-rs/cross

[oswald2]

Ok, cross was on version 0.2.5, installed it now from the main branch:

> cross --version
cross 0.2.5 (4090bec 2024-10-15)
[cross] note: Falling back to `cargo` on the host.
cargo 1.84.0 (66221abde 2024-11-19)

But this unfortunately gives the same result.