tree 3203956361172f3363765922034f96ae319b9fc0
parent 69eddfb6da081489ddb6d8997f6cbc7388c1a025
author Sergiu Deitsch <sergiu.deitsch@gmail.com> 1654638792 +0200
committer Sergiu Deitsch <sergiu.deitsch@gmail.com> 1654639421 +0200

Link against threading library only if necessary

1. The platform specific threads library is only needed if we actually
   use threads. In this case, the library is not optional opposed to
   previous logic.
2. Do not hide the find module output to allow the user to understand
   what happens in case of a CMake failure to locate Threads.
3. Finally, Threads is private dependency that does need to be
   propagated to consumers unless Ceres was compiled as a static
   library.

Change-Id: I8d9d9cd42930e1ed234f69a2dba70d0ee2755b4e