cmake HAVE_DECL_ISFINITE examples

Unidata/netcdf-c CMakeLists.txt :1210 

CHECK_SYMBOL_EXISTS(isfinite "math.h" HAVE_DECL_ISFINITE)

Kitware/VTK ThirdParty/netcdf/vtknetcdf/CMakeLists.txt :192 

check_symbol_exists("isfinite" "math.h" HAVE_DECL_ISFINITE)