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I am attempting to convert a working Makefile into a CMake and need a little assistance. I am trying to cross compile a small program for a yocto device from a Ubuntu20 machine that is trying to link to the devices shared object file with cmake. I have a working Makefile that builds a working program. However, when I try and do this with a CMakeList file it fails at the make stage linking to the shared objects linker flag.

The file structure of the code is as follows;

After a system upgrade (Arch linux) I couldn't compile my project anymore. One of the problems was that there isn't a -pthread flag passed to the compiler anymore.

I managed to write a minimal test case:

The CMakeLists.txt file contains:

I am trying to create a python3 package using cpack (cmake). For some reason it is failing with a cryptic message:

I am trying to compile a simple C++ program with CMake on Ubuntu 18.04, but all of my CMake projects fails when I run the make command. Below is a minimum working example.

The directory structure looks like this:

I'm building a game with raylib and made my own custom button in different files to reuse it when I need it.

I watched tons of videos and read docs but I don't know why it throws undefined reference to CustomButton::CustomButton().

Here's the error:

My project has pretty complex structure. It looks something like this:

I am using CMake 3.19

I am compiling a C app that imports a third party shared library in the ${PROJECT_SOURCE_DIRECTORY}/lib folder.

Here is the relevant snippet of my CMakeLists.txt:

I am trying to run asan using a few compiler versions to catch problems for different targets. To do this I am using custom cmake toolchain files and, to start, the official GCC Docker containers. Using gcc:11 everything works as expected, but for gcc:10 and gcc:9 I cannot link pthread at all using this custom toolchain file. I have confirmed that I can link pthread without my custom toolchain file and all works fine for the ubsan toolchain file. I suspect that I am missing some small detail. I have a minimal example that reproduces this reliably:

I'm new to CMake and also trying to understand how linking works, or what could cause libtorch and OpenNMTTokenizer.so not work together. The former is a package with a CMake config, and the latter is a shared library.

If I remove either one of them the binary works fine, but they can't link in the same project. Maybe the headers are missing for OpenNMTTokenizer.so, but I'm not sure how to properly add them.

This is the error message: