cmake hits undefined reference to `pthread_create'

[ag88]

it seemed there are 3 instances of the same / similar problem

• Installation failed on Mint #192
• http://forum.librecad.org/compile-failed-on-Debian-jessie-td5717401.html
• http://forum.librecad.org/cmake-hits-undefined-reference-to-pthread-create-td5717442.html
  ^^ i encountered this last one and posted that in librecad-3 dev forum
  currently still unresolved

[ag88]

i tried going into build and run
cmake ../subdirectory
apparently lcviewernoqt, lcUILua did not produce the pthread error
for the other subdirectories, the error is produced but surprisingly a makefile is generated,

but if
cmake ..
is run, it would end with
Configuring incomplete, errors occurred! See also "/home/user/src/LibreCAD_3/build/CMakeFiles/CMakeOutput.log". See also "/home/user/src/LibreCAD_3/build/CMakeFiles/CMakeError.log".

[ag88]

i think this is a bug in cmake FindThreads module but so far have not found a fix for it

[lordofbikes]

cross link forum post:
http://forum.librecad.org/cmake-hits-undefined-reference-to-pthread-create-td5717442.html

[ag88]

i logged the issue with cmake - kitware - the company itself
https://gitlab.kitware.com/cmake/cmake/issues/19344