Compiling to x86_64-unknown-linux-gnu with alsa using libudev dependency

[cBournhonesque]

My compilation fails:

called `Result::unwrap()` on an `Err` value: "`PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=\"1\" PKG_CONFIG_ALLOW_SYSTEM_LIBS=\"1\" \"pkg-config\" \"--libs\" \"--cflags\" \"libudev\"` did not exit successfully: exit status: 1\nerror: could not find system library 'libudev' required by the 'libudev-sys' crate\n\n--- stderr\nPackage libudev was not found in the pkg-config search path.\nPerhaps you should add the directory containing `libudev.pc'\nto the PKG_CONFIG_PATH environment variable\nNo package 'libudev' found\n"

even though I added this to my Cross.toml:

[target.x86_64-unknown-linux-gnu]
pre-build = [
    "dpkg --add-architecture $CROSS_DEB_ARCH",
    "apt-get update && apt-get install --assume-yes pkg-config:$CROSS_DEB_ARCH libssl-dev:$CROSS_DEB_ARCH ca-certificates:$CROSS_DEB_ARCH libasound2-dev:$CROSS_DEB_ARCH libpulse-dev:$CROSS_DEB_ARCH libdbus-1-dev:$CROSS_DEB_ARCH portaudio19-dev:$CROSS_DEB_ARCH libudev-dev:$CROSS_DEB_ARCH"
]

My run command is cross build --release --target x86_64-unknown-linux-gnu.

I searched online and it looks like I might be missing from complicated linker env variables?

[Emilgardis]

I'm not able to replicate this, neither with v0.2.5 or using main. Can you post the entire build log

here's my try at reproducing it

cargo init
cargo add libudev-sys

# Cross.toml
[target.x86_64-unknown-linux-gnu]
pre-build = [
    "dpkg --add-architecture $CROSS_DEB_ARCH",
    """apt-get update && apt-get install --assume-yes \
        pkg-config:$CROSS_DEB_ARCH \
        libssl-dev:$CROSS_DEB_ARCH \
        ca-certificates:$CROSS_DEB_ARCH \
        libasound2-dev:$CROSS_DEB_ARCH \
        libpulse-dev:$CROSS_DEB_ARCH \
        libdbus-1-dev:$CROSS_DEB_ARCH \
        portaudio19-dev:$CROSS_DEB_ARCH \
        libudev-dev:$CROSS_DEB_ARCH \
    """
]

❯ cross build --release --target x86_64-unknown-linux-gnu
   Compiling pkg-config v0.3.29
   Compiling libc v0.2.153
   Compiling libudev-sys v0.1.4
   Compiling libudev-test v0.1.0 (/project)
    Finished release [optimized] target(s) in 44.24s

[cBournhonesque]

Hm i'm not too sure why but the error I get now is related to alsa:

error: failed to run custom build command for `alsa-sys v0.3.1`

Caused by:
  process didn't exit successfully: `/target/release/build/alsa-sys-6d9c1bff4963f07a/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-env-changed=ALSA_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  cargo:rerun-if-env-changed=ALSA_STATIC
  cargo:rerun-if-env-changed=ALSA_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_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_PATH
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64-unknown-linux-gnu
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64_unknown_linux_gnu
  cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR

  --- stderr
  thread 'main' panicked at /Users/cbournhonesque/dev/rust/.cargo/registry/src/index.crates.io-6f17d22bba15001f/alsa-sys-0.3.1/build.rs:13:18:
  `PKG_CONFIG_ALLOW_SYSTEM_CFLAGS="1" PKG_CONFIG_ALLOW_SYSTEM_LIBS="1" "pkg-config" "--libs" "--cflags" "alsa"` did not exit successfully: exit status: 1
  error: could not find system library 'alsa' required by the 'alsa-sys' crate

  --- stderr
  Package alsa was not found in the pkg-config search path.
  Perhaps you should add the directory containing `alsa.pc'
  to the PKG_CONFIG_PATH environment variable
  No package 'alsa' found