Compilation error on 'unknown-linux'

[Dentrax]

I am trying to build the project on Travis. But unknown-linux distributions won't compiling.

Error:

error: failed to run custom build command for `libdbus-sys v0.1.5`
process didn't exit successfully: `/home/travis/build/Dentrax/Netlyser/target/debug/build/libdbus-sys-6b2f4649fdb71c20/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: 
Failure { 
command: "\"pkg-config\" \"--libs\" \"--cflags\" \"dbus-1 >= 1.6\"", 
output: Output { status: ExitStatus(ExitStatus(256)), stdout: "", 
stderr: "Package dbus-1 was not found in the pkg-config search path.
Perhaps you should add the directory containing `dbus-1.pc\'\nto the PKG_CONFIG_PATH environment variable
No package \'dbus-1\' found\n" } }', src/libcore/result.rs:997:5

How can i fix this problem on Travis? @diwic

Thank you!

[diwic]

I'm not familiar with travis but make sure you have development headers for dbus installed. In Debian/Ubuntu based distributions, this means installing the package libdbus-1-dev.

[diwic]

Here are instructions on how to install dependencies: https://docs.travis-ci.com/user/installing-dependencies

It seems like Travis is running some Ubuntu version rather than "unknown-linux"?

[Dentrax]

@diwic

Hey, thank you. It compiles successfully on x86_64-unknown-linux-gnu

But it is not compiling for i686-unknown-linux-musl Although libdbus-1-dev is installed.

before_install:
  - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get install -y libdbus-1-dev

Output:

error: failed to run custom build command for `libdbus-sys v0.1.5`
process didn't exit successfully: `/home/travis/build/Dentrax/Netlyser/target/debug/build/libdbus-sys-6b2f4649fdb71c20/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: CrossCompilation', src/libcore/result.rs:997:5

OS:

Operating System Details
Distributor ID:	Ubuntu
Description:	Ubuntu 14.04.5 LTS
Release:	14.04
Codename:	trusty

[diwic]

I have not done cross compilation myself but according to this comment: #134 (comment)

...a workaround is possibly to set PKG_CONFIG_ALLOW_CROSS=1.

[Dentrax]

@levex

Ty, After After dozens of tries, i am getting this error:

Env:

- os: linux
      rust: stable
      env: 
      - TARGET=i686-unknown-linux-musl
      - PKG_CONFIG_ALLOW_CROSS=1
      - CC_x86_64_unknown_linux_musl=x86_64-linux-musl-gcc

before_install:

- if [ $TRAVIS_OS_NAME = "linux" ]; then sudo apt-get install -y libdbus-1-dev libdbus-glib-1-dev musl-tools; fi

error: linking with `cc` failed: exit code: 1
  |
= note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-Wl,--eh-frame-hdr" "-m32" "-Wl,-melf_i386" "-nostdlib" " ........................................"
= note: /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libdbus-1.so when searching for -ldbus-1
          /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libdbus-1.a when searching for -ldbus-1
          /usr/bin/ld: cannot find -ldbus-1
          /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libsqlite3.so when searching for -lsqlite3
          /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libsqlite3.a when searching for -lsqlite3
          /usr/bin/ld: cannot find -lsqlite3
          collect2: error: ld returned 1 exit status
error: aborting due to previous error
error: Could not compile `netlyser`.
Caused by:
  process didn't exit successfully: `rustc --crate-name netlyser src/main.rs --color always --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=b65deb703a1f6236 -C extra-filename=-b65deb703a1f6236 --out-dir /home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps --target i686-unknown-linux-musl -C incremental=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/incremental -L dependency=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps -L dependency=/home/travis/build/Dentrax/Netlyser/target/debug/deps --extern chrono=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libchrono-1704a347ccb015cf.rlib --extern clap=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libclap-d4f2b963d38806ef.rlib --extern console=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libconsole-4015382a9b92883e.rlib --extern env_logger=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libenv_logger-0056f2899fae3fcc.rlib --extern lazy_static=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/liblazy_static-c510b2dc9c7da186.rlib --extern log=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/liblog-cdb71ae66673285d.rlib --extern netlyser=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libnetlyser-9abcce0fe9ef2dea.rlib --extern notify_rust=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libnotify_rust-a3a1feb682c4b0ad.rlib --extern pnet=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libpnet-7785acefe25fba00.rlib --extern regex=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libregex-57eb209a6e6f7630.rlib --extern rusqlite=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/librusqlite-3a610f8e8a961a30.rlib --extern serde=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libserde-96302cb691af04b3.rlib --extern serde_xml_rs=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libserde_xml_rs-5275ad59a7ca4bcd.rlib --extern serde_derive=/home/travis/build/Dentrax/Netlyser/target/debug/deps/libserde_derive-143ecae19981d119.so --extern serde_yaml=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libserde_yaml-1f427a9eba6f481f.rlib --extern tempfile=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/deps/libtempfile-9a2052bcd29665f8.rlib -L native=/usr/lib/x86_64-linux-gnu -L native=/home/travis/build/Dentrax/Netlyser/target/i686-unknown-linux-musl/debug/build/backtrace-sys-333fff48593f7482/out` (exit code: 1)
The command "cargo build --target $TARGET --verbose" exited with 101.

[diwic]

Let's try without pkg-config instead. Could you try putting something like this in your .cargo/config :

[target.armv7-unknown-linux-gnueabihf.dbus]
rustc-link-search = ["putyourlibshere"]
rustc-link-lib = ["dbus-1"]

[target.armv7-unknown-linux-gnueabihf]
linker = "arm-linux-gnueabihf-gcc-8"

...replace arm-linux-gnueabihf-gcc-8 with your cross compiler version, and putyourlibshere with wherever you've installed your target libraries.

See https://doc.rust-lang.org/cargo/reference/build-scripts.html#overriding-build-scripts

Also if you get this to work could you help me documenting it for the next person who wants to cross compile dbus-rs?

[diwic]

Also there is a reddit thread here: https://www.reddit.com/r/rust/comments/bn0xn1/trying_to_cross_compile_for_32_bit_system_from_64/
...that looks what you're trying to do, maybe you are the same person as that reddit poster?

[Dentrax]

@diwic No, I am not that person. :)

I tried what you said. And now I am getting this:

error: linker x86_64-linux-musl-gcc not found

Is my .cargo/config file correct?

[target.i686-unknown-linux-musl.dbus]
rustc-link-search = ["/usr/lib/x86_64-linux-gnu/libdbus-1.so"]
rustc-link-lib = ["dbus-1"]

[target.i686-unknown-linux-musl]
linker = "x86_64-linux-musl-gcc"

Should I just use musl-gcc or something like that?

Project: https://github.com/Dentrax/Netlyser
Also you can check Travis here: https://travis-ci.org/Dentrax/Netlyser/builds/531214406

This bug bothers me now and I don't want to challenge it anymore. :(

[diwic]

@Dentrax I've started to write some cross compilation instructions, but I can't get it to work myself. I'm closing this bug in favor of #184