Fail to compile

[paucazou]

Hello,
thanks for this library which I find pretty interesting because I considered writing it myself before finding yours !
I tried to compile a simple example project but building failed. This is the backtrace :

error: failed to run custom build command for `rtmidi v0.2.0`

Caused by:
  process didn't exit successfully: `/home/partage/.scripts/rust/rtmidi/target/debug/build/rtmidi-0c2e706d61bdb0f5/build-script-build` (exit status: 101)
  --- stdout
  cargo:rustc-link-lib=rtmidi
  cargo:rerun-if-changed=wrapper.h
  cargo:rerun-if-env-changed=RTMIDI_NO_PKG_CONFIG
  cargo:rerun-if-env-changed=PKG_CONFIG
  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
  cargo:rustc-cfg=rtmidi_version="v4_0_0"

  --- stderr
  wrapper.h:3:10: fatal error: 'rtmidi_c.h' file not found
  wrapper.h:3:10: fatal error: 'rtmidi_c.h' file not found, err: true
  thread 'main' panicked at 'Unable to generate bindings: ()', /home/philippe/.cargo/registry/src/github.com-1ecc6299db9ec823/rtmidi-0.2.0/build.rs:41:10
  stack backtrace:
     0: rust_begin_unwind
               at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/std/src/panicking.rs:493:5
     1: core::panicking::panic_fmt
               at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/panicking.rs:92:14
     2: core::result::unwrap_failed
               at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/result.rs:1355:5
     3: core::result::Result<T,E>::expect
               at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/result.rs:997:23
     4: build_script_build::main
               at ./build.rs:36:20
     5: core::ops::function::FnOnce::call_once
               at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/ops/function.rs:227:5
  note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

My questions are:

• is the C++ lib supposed to be compiled before compiling the wrapper?
• where should be the C++ files (and the binary)?

[Tolsi]

For now, you need to download, compile and install the outdated rtmidi 4.0.0.

Just unpack and call:

./configure
make install

[wyleu]

Upon attempting the above on a Pi4 I receive....

 Running `target/debug/rust_duo_piano`

target/debug/rust_duo_piano: error while loading shared libraries: librtmidi.so.5: cannot open shared object file: No such file or directory
I've tried downloading the v5.0.0 file and
./configure
sudo make install...

which produces...

thread 'main' panicked at 'Unsupported RtMidi version '5.0.0'', /home/wyleu/duopiano/rtmidi-rs/build.rs:32:20

as a python programmer I'm a little lost on how to proceed from here.

[wyleu]

as simple as telling the OS where the libraries are...

LD_LIBRARY_PATH=/usr/local/lib cargo run