Where cmake is looking for functions?

[dwarning]

Building since years successful numerical applications on my laptop I am surprised that my own build for qucs-s is working very well if I see the excerpt output of the cmake command to stdout:

-- Looking for floor
-- Looking for floor - not found
-- Looking for pow
-- Looking for pow - not found
-- Looking for exp
-- Looking for exp - not found
-- Looking for sqrt
-- Looking for sqrt - not found
-- Looking for log10
-- Looking for log10 - not found
-- Looking for log
-- Looking for log - not found
-- Looking for cos
-- Looking for cos - not found
-- Looking for sin
-- Looking for sin - not found
-- Looking for acos
-- Looking for acos - not found
and much more.
This is under ubuntu 22.04.

[ra3xdh]

I am getting the same warning on all platforms, but everything could be built without problems. Probably the Cmake checks for some specific function versions. I think these warning may be ignored.

[dsm]

this checks related to qucsator_rf

[ra3xdh]

This warning message is explained here: https://stackoverflow.com/questions/50220242/cmake-check-function-exists-doesnt This is an issue of check_function_exists implementation in CMake.

[ra3xdh]

@dwarning , See the ra3xdh/qucsator_rf#10 for the follow-up for this.