why do I get an 'isnan is not a member of std' error during installation [on hold]

I have a problem installing some open source software. After having set everything with the 'cmake -C' command, the 'make' command yields the following error: 'isnan' is not a member of 'std'. I don't know how it can throw the error, since I have c++11 installed and this should have been checked during cmake. I use Ubuntu 18.04 and I am installing the software via source code.

I would really appreciate and answers.