Merge pull request boostorg#105 from MarcelRaad/extra_semi

Fix -Wextra-semi clang warnings

Merge pull request boostorg#105 from MarcelRaad/extra_semi

Fix -Wextra-semi clang warnings

Fix compilation on QNX up to and including version 7.

Reportedly, QNX does not support fchmodat, although it may support it
in the future.

Fixes boostorg#89.

Added clang 7 CI job.

Merge pull request boostorg#51 from hammond/sysconf-errno

Reset 'errno' after 'sysconf()'

Do not return a reference to NULL in poison_category(), to make the t…

…est pass on clang with variant=release

Merge branch 'develop'

Merge branch 'develop'

Merge branch 'develop'

Merge branch 'develop'