Compilation/linking issues

[alanszlosek]

I had some linking failures while compiling my own code, so I tried the sample code from Issue 6:

use std::sync::{Once, ONCE_INIT};
use mmal_sys as ffi;

fn main() {
    static INIT: Once = ONCE_INIT;
    INIT.call_once(|| unsafe {
        ffi::bcm_host_init();
        ffi::vcos_init();
        ffi::mmal_vc_init();
    });
}

I get the following output:

error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-Wl,--as-needed" "-L" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.0.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.1.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.10.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.11.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.12.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.2.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.3.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.4.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.5.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.6.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.7.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.8.rcgu.o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.testing.60157xxq-cgu.9.rcgu.o" "-o" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34" "/home/pi/rust-security/testing/target/debug/deps/testing-b0d24086c1dc3d34.20iabvxmbiywabro.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/home/pi/rust-security/testing/target/debug/deps" "-L" "/opt/vc/lib" "-L" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib" "-Wl,-Bstatic" "/home/pi/rust-security/testing/target/debug/deps/libmmal_sys-625e8ef038b80f67.rlib" "-Wl,--start-group" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-2ecff75c0f1dd056.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libpanic_unwind-4407d6e80eb2ab95.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libminiz_oxide-638c777da661a25b.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libadler-0c4178ac37ad5512.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libobject-efb25e1f32cb3559.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libaddr2line-379eeb521c099c36.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libgimli-00419cc0cb9d5147.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd_detect-6c859df9e5c06e7c.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/librustc_demangle-3283d3f03bb5049a.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libhashbrown-bd561d57a27dc1b9.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/librustc_std_workspace_alloc-6c69cfcba7996290.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libunwind-ddfb123d87237579.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libcfg_if-9ef6a0bc94fb85ae.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/liblibc-c506a67823d04a67.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/liballoc-80f7d54b5818ea70.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/librustc_std_workspace_core-5ab42311f69374fd.rlib" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libcore-7930b3e0f1a2487a.rlib" "-Wl,--end-group" "/home/pi/.rustup/toolchains/stable-armv7-unknown-linux-gnueabihf/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libcompiler_builtins-6003d0ba0f66a76e.rlib" "-Wl,-Bdynamic" "-lmmal_util" "-lmmal_core" "-lmmal_vc_client" "-lvcos" "-lbcm_host" "-lvchiq_arm" "-lvcsm" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
  = note: /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_port_buffer_header_callback'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_ports_free'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_component_action_trigger'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_ports_alloc'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_buffer_header_release'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_event_error_send'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_queue_get'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_buffer_header_replicate'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_event_format_changed_get'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_component_action_register'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_format_extradata_alloc'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_queue_put'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_component_supplier_register'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_port_alloc'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_log_category'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_port_event_get'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_queue_create'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_buffer_header_driver_data'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_queue_destroy'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_queue_length'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_port_free'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_4cc_to_string'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_format_copy'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_status_to_string'
          /usr/bin/ld: /opt/vc/lib/libmmal_vc_client.so: undefined reference to `mmal_port_event_send'
          collect2: error: ld returned 1 exit status
          

error: aborting due to previous error; 2 warnings emitted

In the meantime is there a way I can work around this by changing the link order in the dependency that Cargo pulls down, then rebuilding that dependency? I'm new to Rust so I don't know how to go about this.

Thanks for your help.