The `Comm::Free` method may be called more than once by applications.
Although some MPI vendors document that `MPI_Comm_free` sets the
given handle to `MPI_COMM_NULL`, this does not always happen in
practice.  Set the handle to `MPI_COMM_NULL` explicitly to avoid
calling `MPI_Comm_free` more than once for the same handle.

Without this, when compiled with PGI and executed with TAU profiling,
a double-free occurs and causes memory to be corrupted.

Print App ID with timing infa on screen as well as write perf files w…

Print App ID with timing infa on screen as well as write perf files with app ID, so apps in an MPMD run can be tracked. Fix array values in tasks with no step setting.

Fix race condition in LocalTimeDate()

TransportMan TSAN changes

Optimize one-sided MPI in SSC

Enable multi-block in SSC reader

added one sided post pull and one sided fence pull modes in ssc

adios_reorganize: do not stay in infinite loop reading an unclosed BP…

Podhorszki, Norbert authored Feb 21, 2020 and Atkins, Charles Vernon committed Feb 21, 2020

adios_reorganize: do not stay in infinite loop reading an unclosed BP file if the reading engine is BPFile, BP3, File or the default (picked by empty string). Instead, explain what's going on and finish.

Fix memory leak from CompressZFP.

table: Enable engine without MPI by cleaning up sub-adios APIs

Allow setting absolute paths for CMAKE_INSTALL_BINDIR

Fix end condition when iterating through `if_nameindex` array.
Add missing resource free operations in error conditions.

Unfortunately the Clang Memory Sanitizer does not recognize that
`if_nameindex` initializes the array behind the pointer it returns
and complains on the first dereference that it is uninitialized.
Suppress the Memory Sanitizer for this function.

Now that we manage table's sub-adios through the core API we can access
the core ADIOS constructor that accepts the Comm abstraction instead of
a raw MPI_Comm.  We can use `Comm::World()` instead of `MPI_COMM_WORLD`.
This allows us to enable the Table engine even when ADIOS is built
without MPI.

Avoid using the public C++11 bindings API from the core implementation.

added CurrentStep in IMPI writer

bindings: Factor out MPI-specific bindings into separate sources

By default, this variable is set to "bin", denoting a path within
CMAKE_INSTALL_PREFIX. It may also be an absolute path which is currently
not considered in the post-install scripts.

Enable multi-writer and multi-reader for ssc

Move code conditioned by `ADIOS2_HAVE_MPI` into source files that are
built only when that condition is true.  Later this will be useful for
compiling the MPI-specific sources in a separate library.