and catch it whenever obj return error and set errno to ENOMEM.

Merge back changes from stable-1.7

Throw transaction_scope_error in case vector/string ctor was called o…

[1.7] Fix compilation of concurrent hash map test

[1.7] Fix void_t declaration.

Update test to new hashmap API introduced in: c67264ae

Drop libdir from pkgconfig.

Extend messages in exceptions

Until CWG 1558 (a C++14 defect), unused parameters in alias templates were
not guaranteed to ensure SFINAE and could be ignored, this implementation
of void_t solves this issue. See: https://en.cppreference.com/w/cpp/types/void_t

to message argument. Use those exception in every place where pmemobj error
is handled.

Speed up some DEVELOPER_MODE checks.

cmake: fix tbb detection for distros without tbb cmake integration

There's no binary library to link against.

string: fix memcheck error of uninitialized size field

Merge back changes from stable 1.6

docker: bump OS' versions

Heterogeneous lookup in concurrent_hash_map

include make_persistent_array.hpp

tests: fix build

fix missing include header file

docker: bump valgrind version

Extended concurrent_hash_map to support heterogeneous find/count/erase
operations. Our implementation is based on the idea described in ISO C++
paper P0919R3 for std::unordered_map
(http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0919r3.html).

[ 76%] Building CXX object tests/external/CMakeFiles/string_libcxx_modifiers_append_iterator.dir/libcxx/basic_string/string.modifiers/string_append/iterator.pass.cpp.o
In file included from /home/mslusarz/pmem/libpmemobj-cpp/tests/external/libcxx/basic_string/string.modifiers/string_append/iterator.pass.cpp:15:0:
/home/mslusarz/pmem/libpmemobj-cpp/tests/external/libcxx/basic_string/string.modifiers/string_append/../throwing_iterator.hpp:22:11: error: ‘ptrdiff_t’ does not name a type
   typedef ptrdiff_t difference_type;
           ^~~~~~~~~
In file included from /home/mslusarz/pmem/libpmemobj-cpp/tests/common/unittest.hpp:38:0,
                 from /home/mslusarz/pmem/libpmemobj-cpp/tests/external/libcxx/basic_string/string.modifiers/string_append/iterator.pass.cpp:16:
/home/mslusarz/pmem/libpmemobj-cpp/tests/common/iterators_support.hpp: In instantiation of ‘class test_support::forward_it<throwing_it<char> >’:
/home/mslusarz/pmem/libpmemobj-cpp/tests/external/libcxx/basic_string/string.modifiers/string_append/iterator.pass.cpp:196:50:   required from here
/home/mslusarz/pmem/libpmemobj-cpp/tests/common/iterators_support.hpp:184:66: error: no type named ‘value_type’ in ‘struct std::iterator_traits<throwing_it<char> >’
  using value_type = typename std::iterator_traits<It>::value_type;
                                                                  ^
/home/mslusarz/pmem/libpmemobj-cpp/tests/common/iterators_support.hpp:186:53: error: no type named ‘difference_type’ in ‘struct std::iterator_traits<throwing_it<char> >’
   typename std::iterator_traits<It>::difference_type;
                                                     ^
/home/mslusarz/pmem/libpmemobj-cpp/tests/common/iterators_support.hpp:187:60: error: no type named ‘pointer’ in ‘struct std::iterator_traits<throwing_it<char> >’
  using pointer = typename std::iterator_traits<It>::pointer;
                                                            ^
/home/mslusarz/pmem/libpmemobj-cpp/tests/common/iterators_support.hpp:188:64: error: no type named ‘reference’ in ‘struct std::iterator_traits<throwing_it<char> >’
  using reference = typename std::iterator_traits<It>::reference;
                                                                ^

bump clang version required for style check

stdexcept is needed in slice.hpp for std::out_of_range support