1) Update ndctl to v64.1
2) ndctl v64.1 depends on the 'keyutils-libs-devel' package,
   so add that to all Docker files

Fix finding valgrind.pc

Install ndctl and daxctl from packages

appveyor: enable previously disabled build steps

... there where version >= 63 is available

'find' can return value != 0 even if it finds the file:
It happens on Arch Linux:
$ find /usr -name valgrind.pc || echo RV=$?
find: ‘/usr/share/polkit-1/rules.d’: Permission denied
/usr/lib/pkgconfig/valgrind.pc
RV=1

Change install-pmdk.sh script

Fix OS environment variable in openSUSE-tumbleweed Docker image

Add an option to not build any packages
if a package manager is not specified.
It is useful for linux distributions
with packages different than RPM and DEB
(for example Arch Linux).

Merge changes from stable 1.8 to master

Add Dockerfile.opensuse-leap-latest

Fix installing libpmem-*.rpm

Merge pull request #498 from ldorau/Do-not-add-symlinks-to-clang-9-in-the-Docker.debian-testing-image

Do not add symlinks to clang-9 in the Docker.debian-testing image

Add Dockerfile.opensuse-tumbleweed-latest

Fix removing pkg-config rpm package

Update version of PMDK in Docker images

Unless there's no other option we should never modify
the operating system, especially when it affects packages
unrelated to pmem. In this particular case,
if clang would point to something other than clang-9,
we could set CMAKE_C/CXX_COMPILER to the correct path.
(https://github.com/pmem/libpmemobj-cpp/pull/473#issuecomment-542313407)

... to the latest stable-1.7 containing a fix
required to build openSUSE Docker images.

Most rpm based OSes use the 'pkgconf' name,
only openSUSE uses 'pkg-config'.

Replace 'libpmem-*.rpm' with 'libpmem*.rpm'.
It fixes following errors on openSUSE:

error: Failed dependencies:
        libpmemobj1 = 1.7-1.suse1500 is needed by libpmemobj-debug-1.7-1.suse1500.x86_64
        libpmemobj1 = 1.7-1.suse1500 is needed by libpmemobj-devel-1.7-1.suse1500.x86_64

error: Failed dependencies:
        libpmem1 = 1.7-1.suse1500 is needed by libpmem-debug-1.7-1.suse1500.x86_64
        libpmem1 = 1.7-1.suse1500 is needed by libpmem-devel-1.7-1.suse1500.x86_64

Change header_features constant to a function in concurrent_hash_map.

Add test with concurrent_hash_map and pmem::obj::string

Update readmes

Remove using namespace from a header

Add Dockerfile.ubuntu-rolling

Add Dockerfile.debian-testing

Add Dockerfile.fedora-rawhide

Install pmdk-debuginfo package

Add Dockerfile.centos-8

Merge pull request #480 from ldorau/common-fix-invalid-TRAVIS_COMMIT_RANGE-in-case-of-non-upstream-repository

common: fix invalid TRAVIS_COMMIT_RANGE in case of non-upstream repository