Ok so that’s what I expected, by default, it will do nothing and let the linker use its default. (which is here, use PIE)
I do understand how to use it from the point of view of the user, but I’m writing a module to share/upstream later on.
I do not have control over CMAKE_POSITION_INDEPENDENT_CODE and I do not want to set it in my module.
Indeed it works if it is either set to TRUE or FALSE, but I don’t think I should enforce that onto the users ?
I mean, we could just say that it’s a problem of configuration on the given system, but I think it’s kind of bad that the user himself has to chime in and set CMAKE_POSITION_INDEPENDENT_CODE manually on such a system.
Ultimately, what I do need is to detect if the linker uses PIE or not by default (by that, I mean without giving it any flag, regardless of CMake variables), which seems to be hard. I suppose the only way to do it is to try_compile with and without ispc’s --pic flag, and see if it really is required or not by default.