Created attachment 1136783 [details]
sample cpp file to test compiling against openbabel

Description of problem:
The most recent openbabel-devel rpm package for Fedora 22
openbabel-devel-2.3.2-11 still has in 
/usr/include/openbabel-2.0/openbabel/shared_ptr.h

#ifdef USE_BOOST
  #include <boost/shared_ptr.hpp>
  #define shared_ptr boost::shared_ptr
#else
  #include <memory>
  #if __GNUC__ == 4  //&& __GNUC_MINOR__ < 3  removed at the suggestion of Konst
antin Tokarev
    #include <tr1/memory>
  #endif
  using std::tr1::shared_ptr;
#endif

The current version of GCC on Fedora 22 is gcc-5.1.1-4.fc22 and it comes with
shared_ptr in std. This has most likely been fixed already in OB source,
but the rpm package is still in fedora repos and is unusable. The error message when trying to compile against openbabel-devel headers and library is:

In file included from /usr/include/openbabel-2.0/openbabel/alias.h:19:0,
                 from obtest.cpp:5:
/usr/include/openbabel-2.0/openbabel/shared_ptr.h:27:14: error: ‘std::tr1’ has not been declared
   using std::tr1::shared_ptr;


here is the trivial fix - put the following in

#ifdef USE_BOOST
  #include <boost/shared_ptr.hpp>
  #define shared_ptr boost::shared_ptr
#else
  #include <memory>
  #if __GNUC__ == 4 
    #include <tr1/memory>
  #endif
#if __GNUC__ < 5
  using std::tr1::shared_ptr;
#else
  using std::shared_ptr;
#endif 
#endif

The user code will probably need to be compiled with -std=c++11 option.

Version-Release number of selected component (if applicable):
openbabel-devel-2.3.2-11

How reproducible:
Always

Steps to Reproduce:
1. Try to compile user code against openbabel-devel provided headers
(see attached sample file).
2. g++ -o obtest -I/usr/include/openbabel-2.0/  obtest.cpp -lopenbabel
3. g++ -std=c++11 -o obtest -I/usr/include/openbabel-2.0/  obtest.cpp -lopenbabel

Actual results:
In file included from /usr/include/openbabel-2.0/openbabel/alias.h:19:0,
                 from obtest.cpp:5:
/usr/include/openbabel-2.0/openbabel/shared_ptr.h:27:14: error: ‘std::tr1’ has not been declared
   using std::tr1::shared_ptr;

Expected results:
compilation successful.

Additional info:
Attached a sample cpp file to test building against openbabel.