undefined reference to `pthread_create'

[thewh1teagle]

Checklist

• I've looked through the issues and pull requests for similar reports

Describe your issue

I'm trying to compile the crate espeak-rs-sys with cross for linux arm64 but it failed with this error:

  [ 95%] Linking CXX executable espeak-ng

  --- stderr
  Failed to run rustfmt: cannot find binary path (non-fatal, continuing)
  make: warning: -j8 forced in submake: resetting jobserver mode.
  /usr/lib/gcc-cross/aarch64-linux-gnu/9/../../../../aarch64-linux-gnu/bin/ld: libespeak-ng/libespeak-ng.a(event.c.o): in function `event_init':
  event.c:(.text.event_init+0xd0): undefined reference to `pthread_create'
  /usr/lib/gcc-cross/aarch64-linux-gnu/9/../../../../aarch64-linux-gnu/bin/ld: libespeak-ng/libespeak-ng.a(event.c.o): in function `event_terminate':
  event.c:(.text.event_terminate+0x60): undefined reference to `pthread_join'
  /usr/lib/gcc-cross/aarch64-linux-gnu/9/../../../../aarch64-linux-gnu/bin/ld: libespeak-ng/libespeak-ng.a(fifo.c.o): in function `fifo_init':
  fifo.c:(.text.fifo_init+0x1d0): undefined reference to `pthread_create'
  /usr/lib/gcc-cross/aarch64-linux-gnu/9/../../../../aarch64-linux-gnu/bin/ld: libespeak-ng/libespeak-ng.a(fifo.c.o): in function `fifo_terminate':
  fifo.c:(.text.fifo_terminate+0x70): undefined reference to `pthread_join'
  collect2: error: ld returned 1 exit status
  make[2]: *** [src/CMakeFiles/espeak-ng-bin.dir/build.make:100: src/espeak-ng] Error 1
  make[1]: *** [CMakeFiles/Makefile2:940: src/CMakeFiles/espeak-ng-bin.dir/all] Error 2
  make: *** [Makefile:166: all] Error 2
  thread 'main' panicked at /Users/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cmake-0.1.51/src/lib.rs:1100:5:

  command did not execute successfully, got: exit status: 2

  build script failed, must exit now
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

cross config:
https://github.com/thewh1teagle/piper-rs/blob/5191355716a2818913381e01d8a8ac8e7d3b6525/Cargo.toml#L34-L39

What target(s) are you cross-compiling for?

aarch64-unknown-linux-gnu

Which operating system is the host (e.g computer cross is on) running?

• macOS
• Windows
• Linux / BSD
• other OS (specify in description)

What architecture is the host?

• x86_64 / AMD64
• arm32
• arm64 (including Mac M1)

What container engine is cross using?

• docker
• podman
• other container engine (specify in description)

cross version

cross 0.2.5 (4090bec 2024-10-15)

Example

git clone --recursive --branch feat/linux-arm64 https://github.com/thewh1teagle/piper-rs
cd piper-rs
cross build --no-default-features -p espeak-rs-sys --target aarch64-unknown-linux-gnu

Additional information / notes

it builds in thewh1teagle/piper-rs#5 manually on ubuntu 22.04 x64
Also in Dockerfile.linux.arm64