error while compiling with matlab mex - matlab

Question

I am try to compile using matlab mex, but i keep receiving this error:
Warning: You are using gcc version "5.4.0-6ubuntu1~16.04.1)". The version
currently supported with MEX is "4.2.3".
For a list of currently supported compilers see:
http://www.mathworks.com/support/compilers/current_release/
In file included from descriptor.h:4:0,
from calc_shot.cpp:11:
mesh.h: In function ‘double magnitude(const vec3d<T>&)’:
mesh.h:106:9: error: ‘sqrt’ is not a member of ‘std’
return std::sqrt((v1.x*v1.x) + (v1.y*v1.y) + (v1.z*v1.z));
^
In file included from calc_shot.cpp:11:0:
descriptor.h: At global scope:
descriptor.h:7:57: error: expected class-name before ‘{’ token
class invalid_mesh_descriptor : public std::logic_error {
^
descriptor.h: In constructor ‘invalid_mesh_descriptor::invalid_mesh_descriptor()’:
descriptor.h:9:57: error: expected class-name before ‘(’ token
explicit invalid_mesh_descriptor() : std::logic_error("Exception invalid_mesh_descriptor caught.") {}
^
descriptor.h:9:57: error: expected ‘{’ before ‘(’ token
descriptor.h: In constructor ‘invalid_mesh_descriptor::invalid_mesh_descriptor(const string&)’:
descriptor.h:10:70: error: expected class-name before ‘(’ token
invalid_mesh_descriptor(const std::string& msg) : std::logic_error("Exception invalid_mesh_descriptor caught: "+msg) {}
^
descriptor.h:10:70: error: expected ‘{’ before ‘(’ token
descriptor.h: In function ‘std::ostream& operator<<(std::ostream&, const vec_descriptor<T>&)’:
descriptor.h:123:45: error: no match for ‘operator<<’ (operand types are ‘std::ostream {aka std::basic_ostream<char>}’ and ‘const char [2]’)
for (size_t k=1; k < d.size(); ++k) s << " " << d(k);
^
In file included from /usr/include/c++/5/string:52:0,
from descriptor.h:5,
from calc_shot.cpp:11:
/usr/include/c++/5/bits/basic_string.h:5172:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator<<(basic_ostream<_CharT, _Traits>& __os,
^
/usr/include/c++/5/bits/basic_string.h:5172:5: note: template argument deduction/substitution failed:
In file included from calc_shot.cpp:11:0:
descriptor.h:123:48: note: mismatched types ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’ and ‘const char [2]’
for (size_t k=1; k < d.size(); ++k) s << " " << d(k);
^
mex: compile of ' "calc_shot.cpp"' failed.
i used to compile this code with LD_PRELOAD but at the moment i do not remember the argument, how can i solve?

Answer 1

solution:
mex -v calc_shot.cpp shot_descriptor.cpp -DUSE_FLANN -I"C:\Program Files\flann\include" -I/usr/include/eigen3
using this command the programs works like a charm