Replaced all occurences of deprecated auto_ptr by unique_ptr

[meyerj]

auto_ptr was deprecated in C++11. Removes compiler warnings when compiling with -std=c++11.
See http://en.cppreference.com/w/cpp/memory/auto_ptr.

[snrkiwi]

So is C++11 a requirement now for RTT? If so, where is that documented?

[meyerj]

No, it's not a requirement. With the patch RTT only uses unique_ptr if available (using Boost Config macros) and falls back to auto_ptr otherwise. The main reason is to avoid deprecated warnings in some compilers, especially GCC 5 or Clang with C++11 enabled. See https://travis-ci.org/orocos-toolchain/rtt/jobs/190786861 for an example.

Like some of the other PRs I submitted last week this patch is a consequence of the build errors and warnings revealed by the new Travis build matrix introduced in #195.

To our best knowledge the only PR that would raise the compiler version requirements to at least GCC 4.2 is #200, which removes the version check that enables or disables visibility support conditionally. But I don't think that anyone still uses older compilers or Boost versions. We recently verified successful compilation and that unit tests still pass for the current master branch in Ubuntu Lucid for #201 (gcc 4.4, Boost 1.40).

But you are right that using Boost Config for the check raises the minimum Boost version requirement to 1.50, which introduced the BOOST_NO_CXX11_SMART_PTR macro. Probably checking __cplusplus instead is the more backwards compatible solution. This would also affect #196 and #197.

[meyerj]

But you are right that using Boost Config for the check raises the minimum Boost version requirement to 1.50, which introduced the BOOST_NO_CXX11_SMART_PTR macro. Probably checking __cplusplus instead is the more backwards compatible solution. This would also affect #196 and #197.

I replaced Boost Config macros by __cplusplus > 199711L checks.