3rd party library - find_package(Threads REQUIRED)

[thiago.roque]

Hello,

I'm quite new to cmake and I'm having some issues on using an external library with IDF.
The library in question is liblsl (https://github.com/sccn/liblsl) which is a quite complex library for networking time-synchronized time-series.

One of it's requirements is threads, but for some reason I'm not making it possible for it to uses IDF's pthreads implementation.
I tried to "force" it through "find_package(Threads REQUIRED PATHS ~/esp/esp-idf/components/pthread)"
But it didn't work, resulting in:

Make Error at main/lib/liblsl/CMakeLists.txt:168 (find_package):
Could not find a package configuration file provided by "Threads" with any
of the following names:

ThreadsConfig.cmake
threads-config.cmake

Add the installation prefix of "Threads" to CMAKE_PREFIX_PATH or set
"Threads_DIR" to a directory containing one of the above files. If
"Threads" provides a separate development package or SDK, be sure it has
been installed.


-- Configuring incomplete, errors occurred!
FAILED: build.ninja

But I'm not sure if this is the right approach.

One thing I was considering is pre-compiling liblsl and statically link it, but I'm also not sure how this would work since I would have to compile it specifically for the ESP32 framework.

I would deeply appreciate any hints or advices on how to accomplish this feat.

Thanks!