e-foto error

c/photogrammetry/DemGrid.cpp: In member function ‘double br::uerj::eng::efoto::DemGrid::getStdZ()’:
c/photogrammetry/DemGrid.cpp:144:20: warning: ‘stdZ’ may be used uninitialized in this function [-Wmaybe-uninitialized]
         return sqrt(stdZ/double(count));
                    ^
c/photogrammetry/BundleAdjustment.cpp: In member function ‘int br::uerj::eng::efoto::BundleAdjustment::testConverged()’:
c/photogrammetry/BundleAdjustment.cpp:1565:46: error: ‘isinf’ was not declared in this scope
                 if (isinf(fabs(x1.get(i+1,1))))
                                              ^
c/photogrammetry/BundleAdjustment.cpp:1565:46: note: suggested alternative:
In file included from c/infrastructure/Matrix.h:32:0,
                 from c/photogrammetry/BundleAdjustment.h:20,
                 from c/photogrammetry/BundleAdjustment.cpp:18:
/usr/include/c++/5.3.0/cmath:621:5: note:   ‘std::isinf’
     isinf(_Tp __x)
     ^
c/photogrammetry/BundleAdjustment.cpp:1570:46: error: ‘isnan’ was not declared in this scope
                 if (isnan(fabs(x1.get(i+1,1))))
                                              ^
c/photogrammetry/BundleAdjustment.cpp:1570:46: note: suggested alternative:
In file included from c/infrastructure/Matrix.h:32:0,
                 from c/photogrammetry/BundleAdjustment.h:20,
                 from c/photogrammetry/BundleAdjustment.cpp:18:
/usr/include/c++/5.3.0/cmath:641:5: note:   ‘std::isnan’
     isnan(_Tp __x)
     ^
c/photogrammetry/BundleAdjustment.cpp:1593:44: error: ‘isinf’ was not declared in this scope
                 if (isinf(fabs(x2.get(i,1))))
                                            ^
c/photogrammetry/BundleAdjustment.cpp:1593:44: note: suggested alternative:
In file included from c/infrastructure/Matrix.h:32:0,
                 from c/photogrammetry/BundleAdjustment.h:20,
                 from c/photogrammetry/BundleAdjustment.cpp:18:
/usr/include/c++/5.3.0/cmath:621:5: note:   ‘std::isinf’
     isinf(_Tp __x)
     ^
c/photogrammetry/BundleAdjustment.cpp:1598:44: error: ‘isnan’ was not declared in this scope
                 if (isnan(fabs(x2.get(i,1))))
                                            ^
c/photogrammetry/BundleAdjustment.cpp:1598:44: note: suggested alternative:
In file included from c/infrastructure/Matrix.h:32:0,
                 from c/photogrammetry/BundleAdjustment.h:20,
                 from c/photogrammetry/BundleAdjustment.cpp:18:
/usr/include/c++/5.3.0/cmath:641:5: note:   ‘std::isnan’
     isnan(_Tp __x)
     ^