Post-release Patches

• Atomic:

  • Using 64-bit atomic operations on 32-bit x86 with gcc versions older than 4.7 and compatible compilers can result in generation of incorrect code. This problem is fixed in this commit.

Updated Libraries

• Atomic:

  • Added the static constant atomic<T>::is_always_lock_free for conformance with C++17. The constant indicates that the given specialization always provides lock-free implementation of atomic operations.
  • Improved support of Oracle Studio on x86 targets.
• Container:

  • Fixed bugs:

    • Trac #12534: "flat_map fails to compile if included after type_traits is instantiated under gcc".
    • Trac #12577: "Null reference in pair.hpp triggers runtime warning with -fsanitize=undefined".
    • GitHub #40: Fix parameter types in copy_move_algo.hpp: iterator_traits::difference_type -> allocator_traits::size_type.
    • GitHub #41: Avoid -Wunreachable-code in do_allocate().
• Context:

  • #11687 Xcode (Apple clang) and thread_local
  • #12114 context does not preserve fpu context on ios arm64 devices (fixed for other architecturs too)
  • #12411 fpu registers not preserved with O2 optimizations in Visual Studio (fixed for other architecturs too)
  • #12551 building boost on arm64 causes error: unknown directive
  • reduced signatur for ontop-functions
  • unit-test for private fcontext-API
  • performance-test for ucontext and fcontext fixed
• Fiber:

  • unbounded_channel and bounded_channel marked as deprecated
  • new classes buffered_channel and unbuffered_channel
  • performance improved
• Fusion:

  • Fixed fusion::vector buggy constructors (Thanks to Lee Clagett).
  • BOOST_FUSION_ADAPT* and BOOST_FUSION_DEFINE* now allow empty structures. (#6592)
  • BOOST_FUSION_DEFINE* allows move constructor and assignment. (#10099)
  • Adaptor for std::array (Thanks to Mateusz Łoskot). (#8241)
  • Fixed returning temporary variable warnings on MSVC.
• Geometry:

  • Improvements:

    • Intersection: take care that output is valid (work in progres, not yet finished - but more is valid)
  • Solved tickets:

    • #12289 Avoid warning/compilation error for std::cout
    • #12412 Invalid result of covered_by() with geographic Points and Boxes
    • #12413 rtree::remove() not working properly with geographic Points
• Hash:

  • Fixed some warnings.
• Interprocess:

  • Fixed bugs:

    • Trac #12499 ("Memory allocation fails").
    • GitHub Pull #30 ("Provide extension point so library user can provide default temp folder").
    • GitHub Pull #31 ("Add xsi_key(key_t) constructor").
• Intrusive:

  • Fixed bugs:

    • Boost Trac #12556: member_value_traits.hpp has a missing #include
• Lexical Cast:

  • Fixed issue found by -fsanitize=undefined #21
• Log:

  • General changes:

    • Removed the previously deprecated type_info_wrapper.
  • New features:

    • Added a way to access the current file name from the text file sink backend. The file name can be obtained with the get_current_file_name method.
  • Bug fixes:

    • Fixed compilation errors for Android API prior to version 21.
    • Streaming operators now take scalar types and enums by value. This allows to output static constants and bitfields directly into formatting stream and record stream. (#11998)
    • Fixed auto-detection of native syslog API. (#12600)
    • In UDP socket based syslog backend implementation, changed the syslog message format for better compliance with RFC3164.
    • File close handler installed in text file sink backend is no longer called if the file is not open yet.
  • See changelog for more details.
• Metaparse:

  • Improved the implementation of BOOST_METAPARSE_STRING

    • The maximal string length limit has been increased to 2048
    • The maximal string length limit can be extended beyond 2048 by regenerating some of the Boost headers using a script (part of the library)
    • The string length limit can be changed within a compilation unit
• Move:

  • Improved experimental adaptive sort algorithm performance
  • Activate BOOST_MOVE_FORCEINLINE
• Optional:

  • Added two new in-place constructors. They work similarly to emplace() functions: they initialize the contained value by perfect-forwarding the obtained arguments. One constructor always initializes the contained value, the other based on a boolean condition.
  • Syntax o = {} now correctly un-initializes an optional, just like in std::optional.
  • Fixed optional<optional<T>&> initialization. (#12203)
  • Optional constructors are sfinae-friendly. This fixes interaction with std::tuple. (#12563)
• Phoenix:

  • Most of modules now support C++11 variadic templates.
  • Fixed type deduction failure with result type.
  • Suppress unused warnings.
  • Fixed too few arguments error on binary math functions.
  • Added workarounds for older compiler.
• Python:

  • Added (basic) support for C++11 (std::shared_ptr, std::unique_ptr)
  • Incorporated an extension API to wrap NumPy
  • Removed obsolete bits and pieces
• Test:

  • Boost.test v3.4 see the Change log section for more details.
  • New feature: per_element and lexicographic modifiers of BOOST_TEST can also be applied to string comparison
  • Breaking change: colons that appear in test case names are replaced with underscores
  • Bug fixes

    • Trac tickets #11756, #11907, #12339, #12506, #12507, #12530,
    • Trac tickets #12531
    • Pull request PR103, PR104
• TypeIndex:

  • Added runtime_cast to the library as an emulation of dynamic_cast. Thanks to Chris Glover for the implementation. See runtime_cast reference for more info.
  • Internals of the CTTI were made more platform independant, due to change of the std::size_t type to unsigned int.
• Units:

  • Fix inspection warnings
  • updated physico-chemical constants to CODATA 2014 values
  • define biot correctly as 10 Ampere
• Unordered:

  • Fix an exception safety issue in assignment.
  • Use std::allocator_traits where available, and support modern style rebind (#12459).
  • Add some allocator aware constructors.
  • Use the hint iterator in emplace_hint.
  • Fixed some warnings.
  • See the changelog for more details.

Compilers Tested

Boost's primary test compilers are:

• Linux:

  • Clang: 3.0, 3.8.1
  • Clang, C++11: 3.0, 3.1, 3.2, 3.3, 3.4, 3.8.1
  • Clang, C++14: 3.5, 3.6, 3.7, 3.8.1
  • Clang, C++1z: 3.8.1
  • GCC: 4.4.7, 4.5.3, 4.6.3, 4.7.2, 5.2.0, 6.2.0
  • GCC, C++11: 4.4.7, 4.7.2, 4.7.3, 4.8.5, 4.9.3, 5.2.0, 6.1.1, 6.2.0
  • GCC, C++14: 5.2.0, 5.3.0, 6.1.1, 6.2.0
  • Intel: 16.0, 17.0
  • Intel, C++11: 16.0, 17.0
  • Intel, C++14: 16.0, 17.0
• OS X:

  • Apple Clang: 7.0.2
  • Apple Clang, C++11: 7.0.2
• Windows:

  • GCC, C++03, mingw: 3.4.5, 4.1.2, 4.2.4, 4.3.3, 4.4.0
  • GCC, C++11, mingw: 4.6.4, 4.7.3, 4.8.1
  • GCC, C++14, mingw: 4.9.3, 5.1.0, 5.2.0, 5.3.0, 6.1.0
  • Visual C++: 7.1, 8.0, 9.0, 10.0, 11.0, 12.0, 14.0
• Android:

  • Clang: 3.6, 3.7, 3.8
  • GCC: 4.9, 5.4, 6.2
• QNX:

  • QCC: 4.4.2
• SunOS:

  • Oracle Solaris Studio: 12.5
  • Oracle Solaris Studio, C++11: 12.5

Boost's additional test compilers include:

• Linux:

  • Clang: 3.0, 3.8.1
  • Clang, C++11: 3.0, 3.1, 3.2, 3.3, 3.4, 3.8.1
  • Clang, C++14: 3.5, 3.6, 3.7, 3.8.1
  • Clang, C++1z: 3.8.1
  • GCC: 4.4.7, 4.5.3, 4.6.3, 4.7.2, 5.2.0, 6.1.1, 6.2.0
  • GCC, C++11: 4.4.7, 4.7.2, 4.7.3, 4.8.5, 4.9.3, 5.2.0, 6.1.1, 6.2.0
  • GCC, C++14: 5.2.0, 5.3.0, 6.1.1, 6.2.0, 7.0.0 (experimental)
  • GCC, C++1z: 6.1.1
  • Intel: 16.0, 17.0
  • Intel, C++11: 16.0, 17.0
  • Intel, C++14: 16.0, 17.0
• OS X:

  • Apple Clang: 7.0.2
  • Apple Clang, C++11: 7.0.2
• Windows:

  • GCC, C++03, mingw: 3.4.5, 4.1.2, 4.2.4, 4.3.3, 4.4.0
  • GCC, C++11, mingw: 4.6.4, 4.7.3, 4.8.1
  • GCC, C++14, mingw: 4.9.3, 5.1.0, 5.2.0, 5.3.0, 6.1.0
  • Visual C++: 7.1, 8.0, 9.0, 10.0, 11.0, 12.0, 14.0
• Android:

  • Clang: 3.6, 3.7, 3.8
  • GCC: 4.9, 5.4, 6.2
  • GCC,C++14: 6.1.0
• QNX:

  • QCC: 4.4.2
• SunOS:

  • Oracle Solaris Studio: 12.5
  • Oracle Solaris Studio, C++11: 12.5

Acknowledgements

Beman Dawes, Eric Niebler, Rene Rivera, Daniel James, Vladimir Prus and Marshall Clow managed this release.