Building liblsl-rust in github actions

[LangArthur]

Hi!

I tried to build a projetc with the liblsl inside a github action, but it fails to build liblsl with the following error :

 In file included from /usr/include/pthread.h:33,
                   from /usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:35,
                   from /usr/include/x86_64-linux-gnu/c++/13/bits/gthr.h:148,
                   from /usr/include/c++/13/ext/atomicity.h:35,
                   from /usr/include/c++/13/bits/ios_base.h:39,
                   from /usr/include/c++/13/ios:44,
                   from /usr/include/c++/13/ostream:40,
                   from /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/boost/system/error_code.hpp:17,
                   from /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/boost/system/system_error.hpp:11,
                   from /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/boost/thread/exceptions.hpp:22,
                   from /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/boost/thread/pthread/thread_data.hpp:10,
                   from /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/boost/thread/thread_only.hpp:17,
                   from /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/libs/thread/src/pthread/thread.cpp:11:
  /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/lsl-sys-0.1.1/liblsl/lslboost/boost/thread/pthread/thread_data.hpp:60:5: error: missing binary operator before token "("
     60 | #if PTHREAD_STACK_MIN > 0
        |     ^~~~~~~~~~~~~~~~~

I fond an issue on boost, which seems to be my problem
boostorg/thread#364

However it should have been fixed several years ago, and it seems you are using boost 1.78, which sould be patched.

I also found somewhere else that adding this cmake flags can solve the problem (CFLAGS="-D_GNU_SOURCE", CXXFLAGS="-D_GNU_SOURCE") but exporting them before cargo build does not solved it (it might be override at some point in the build ?)

I do not have any more ideas at the moment, here is my action, nothing too fancy :

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
      - name: Build
        run: |
          cargo build
      - name: Run tests
        run: cargo test

Do you have any idea ?