Working with external library in C++ (SVL library) - c++

Question

I tried to install the external library SVL, that is given in the link. I did make install and it seems now I can import it as given in documentation using #include <svl/some_header_files.h>
Now I want to run some of my program to test. But I am struggling with it. I did
g++ vertex.hh vertex.cc
the program I want to work and it gives out,
In file included from vertex.hh:9:
In file included from /usr/local/include/svl/Vec3.h:14:
/usr/local/include/svl/Vec2.h:25:10: error: unknown type name 'Real'
Vec2(Real x, Real y); // (x, y)
^
/usr/local/include/svl/Vec2.h:25:18: error: unknown type name 'Real'
Vec2(Real x, Real y); // (x, y)
^
/usr/local/include/svl/Vec2.h:27:10: error: unknown type name 'ZeroOrOne'
Vec2(ZeroOrOne k); // v[i] = vl_zero
^
/usr/local/include/svl/Vec2.h:28:10: error: unknown type name 'Axis'
Vec2(Axis k); // v[k] = 1
^
/usr/local/include/svl/Vec2.h:32:5: error: unknown type name 'Real'
Real &operator [] (Int i);
^
/usr/local/include/svl/Vec2.h:32:31: error: unknown type name 'Int'; did you mean 'int'?
Real &operator [] (Int i);
and more similar errors, which is then followed by
In file included from vertex.cc:10:
In file included from /usr/local/include/svl/Vec3.h:14:
/usr/local/include/svl/Vec2.h:25:10: error: unknown type name 'Real'
Vec2(Real x, Real y); // (x, y)
^
/usr/local/include/svl/Vec2.h:25:18: error: unknown type name 'Real'
Vec2(Real x, Real y); // (x, y)
^
/usr/local/include/svl/Vec2.h:27:10: error: unknown type name 'ZeroOrOne'
Vec2(ZeroOrOne k); // v[i] = vl_zero
^
and more similar errors,
and in the end,
/usr/local/include/svl/Vec2.h:69:27: error: unknown type name 'Int'; did you mean 'int'?
Vec2 &MakeUnit(Int i, Real k = vl_one); // I[i]
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
Can you tell me what is going on here? How can i fix this?
Here is the link to the two files vertex.ccand vertex.hh
https://www.dropbox.com/sh/4cax5ftk2lssots/AAA62m2VnSZXqBfB65VfVqFTa?dl=0
New error using #include "svl/SVL.h"
In file included from vertex.hh:13:
./edge.hh:289:10: warning: unelaborated friend declaration is a C++11 extension; specify 'class' to befriend 'QuadEdge'
[-Wc++11-extensions]
friend QuadEdge;
^
class
1 warning generated.
In file included from vertex.cc:12:
In file included from ./cell.hh:9:
./edge.hh:289:10: warning: unelaborated friend declaration is a C++11 extension; specify 'class' to befriend 'QuadEdge'
[-Wc++11-extensions]
friend QuadEdge;
^
class
In file included from vertex.cc:12:
./cell.hh:293:10: warning: unelaborated friend declaration is a C++11 extension; specify 'class' to befriend 'CellVertexIterator'
[-Wc++11-extensions]

Answer 1

Why are you compiling vertex.hh? Why not just
g++ vertex.cc
Secondly, can you show us the contents of your header file and source file. Actually, the source file can probably be:
#include "vertex.hh"
int main() { return 0; }
and the header file:
#include "svl/SVL.h"
Secondly, when you say "#include " are you just including some of SVL internal headers? That may not work. http://www.cs.cmu.edu/~ajw/doc/svl.html says "for basic use, the only header file needed is svl/SVL.h".