Make error 'insan' for Ubuntu

[sgalla32]

Kia ora,

I am trying to install mapgd on my linux/Ubuntu 16.04 xenial platform. I am able to run ./configure just fine (see config.log, attached). But when I use the make command, I get the following error:

data_types/sample_gof.cc: In member function ‘virtual void Sample_gof::write(std::ostream&) const’:
data_types/sample_gof.cc:73:20: error: ‘isnan’ was not declared in this scope
  if (!isnan(number_) )
                    ^
data_types/sample_gof.cc:73:20: note: suggested alternative:
In file included from /usr/include/c++/5/random:38:0,
                 from /usr/include/c++/5/bits/stl_algo.h:66,
                 from /usr/include/c++/5/algorithm:62,
                 from ./stream_tools/stream_tools.h:8,
                 from data_types/sample_gof.h:14,
                 from data_types/sample_gof.cc:1:
/usr/include/c++/5/cmath:641:5: note:   ‘std::isnan’
     isnan(_Tp __x)
     ^
Makefile:238: recipe for target 'objs/sample_gof.o' failed
make[2]: *** [objs/sample_gof.o] Error 1
make[2]: Leaving directory '/home/stephanie/MAPGD-master/src/mapgd_0.4'
Makefile:10: recipe for target 'mapgd_0.4' failed
make[1]: *** [mapgd_0.4] Error 2
make[1]: Leaving directory '/home/stephanie/MAPGD-master/src'
Makefile:62: recipe for target 'src' failed
make: *** [src] Error 2

And when I run sudo make install:

data_types/sample_gof.cc: In member function ‘virtual void Sample_gof::write(std::ostream&) const’:
data_types/sample_gof.cc:73:20: error: ‘isnan’ was not declared in this scope
  if (!isnan(number_) )
                    ^
data_types/sample_gof.cc:73:20: note: suggested alternative:
In file included from /usr/include/c++/5/random:38:0,
                 from /usr/include/c++/5/bits/stl_algo.h:66,
                 from /usr/include/c++/5/algorithm:62,
                 from ./stream_tools/stream_tools.h:8,
                 from data_types/sample_gof.h:14,
                 from data_types/sample_gof.cc:1:
/usr/include/c++/5/cmath:641:5: note:   ‘std::isnan’
     isnan(_Tp __x)
     ^
Makefile:238: recipe for target 'objs/sample_gof.o' failed
make[2]: *** [objs/sample_gof.o] Error 1
make[2]: Leaving directory '/home/stephanie/MAPGD-master/src/mapgd_0.4'
Makefile:10: recipe for target 'mapgd_0.4' failed
make[1]: *** [mapgd_0.4] Error 2
make[1]: Leaving directory '/home/stephanie/MAPGD-master/src'
Makefile:62: recipe for target 'src' failed
make: *** [src] Error 2

Is there an easy way to get around this error with the install? Thank you very much for your time and help.

config.log