Subfiling VFD source cleanup (#3241)

* Subfiling VFD source cleanup

Modularize Subfiling CMake code into separate CMakeLists.txt file

Update Mercury util code to latest version and update Copyright

Generate mercury_util_config.h header file instead of using
pre-generated file

Remove unnecessary Mercury functionality

Fix minor warning in Subfiling VFD code

* Remove Mercury headers from Autotools publicly-distributed header list

27 files changed, 45 insertions, 3256 deletions

diff --git a/src/H5FDsubfiling/mercury/LICENSE.txt b/src/H5FDsubfiling/mercury/LICENSE.txt
index d3f4203..6b68f8f 100644
--- a/src/H5FDsubfiling/mercury/LICENSE.txt
+++ b/src/H5FDsubfiling/mercury/LICENSE.txt
@@ -1,4 +1,5 @@
-Copyright (c) 2013-2021, UChicago Argonne, LLC and The HDF Group.
+Copyright (c) 2013-2022, UChicago Argonne, LLC and The HDF Group.
+Copyright (c) 2022-2023, Intel Corporation.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -24,4 +25,4 @@ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/src/H5FDsubfiling/mercury/README.md b/src/H5FDsubfiling/mercury/README.md
deleted file mode 100644
index d159548..0000000
--- a/src/H5FDsubfiling/mercury/README.md
+++ /dev/null
@@ -1,230 +0,0 @@
-Mercury
-=======
-[![Build status][github-ci-svg]][github-ci-link]
-[![Latest version][mercury-release-svg]][mercury-release-link]
-[![Spack version][spack-release-svg]][spack-release-link]
-
-Mercury is an RPC framework specifically designed for use in HPC systems
-that allows asynchronous transfer of parameters and execution requests,
-as well as direct support of large data arguments. The network implementation
-is abstracted, allowing easy porting to future systems and efficient use
-of existing native transport mechanisms. Mercury's interface is generic
-and allows any function call to be serialized.
-Mercury is a core component of the [Mochi][mochi-link] ecosystem of
-microservices.
-
-Please see the accompanying LICENSE.txt file for license details.
-
-Contributions and patches are welcomed but require a Contributor License
-Agreement (CLA) to be filled out. Please contact us if you are interested
-in contributing to Mercury by subscribing to the
-[mailing lists][mailing-lists].
-
-Architectures supported
-=======================
-
-Architectures supported by MPI implementations are generally supported by the
-network abstraction layer.
-
-The OFI libfabric plugin as well as the SM plugin
-are stable and provide the best performance in most workloads. Libfabric
-providers currently supported are: `tcp`, `verbs`, `psm2`, `gni`.
-
-The UCX plugin is also available as an alternative transport on platforms
-for which libfabric is either not available or not recommended to use,
-currently supported protocols are tcp and verbs.
-
-MPI and BMI (tcp) plugins are still supported but gradually being moved as
-deprecated, therefore should only be used as fallback methods.
-The CCI plugin is deprecated and no longer supported.
-
-See the [plugin requirements](#plugin-requirements) section for
-plugin requirement details.
-
-Documentation
-=============
-
-Please see the documentation available on the mercury [website][documentation]
-for a quick introduction to Mercury.
-
-Software requirements
-=====================
-
-Compiling and running Mercury requires up-to-date versions of various
-software packages. Beware that using excessively old versions of these
-packages can cause indirect errors that are very difficult to track down.
-
-Plugin requirements
--------------------
-
-To make use of the OFI libfabric plugin, please refer to the libfabric build
-instructions available on this [page][libfabric].
-
-To make use of the UCX plugin, please refer to the UCX build
-instructions available on this [page][ucx].
-
-To make use of the native NA SM (shared-memory) plugin on Linux,
-the cross-memory attach (CMA) feature introduced in kernel v3.2 is required.
-The yama security module must also be configured to allow remote process memory
-to be accessed (see this [page][yama]). On MacOS, code signing with inclusion of
-the na_sm.plist file into the binary is currently required to allow process
-memory to be accessed.
-
-To make use of the BMI plugin, the most convenient way is to install it through
-spack or one can also do:
-
-    git clone https://github.com/radix-io/bmi.git && cd bmi
-    ./prepare && ./configure --enable-shared --enable-bmi-only
-    make && make install
-
-To make use of the MPI plugin, Mercury requires a _well-configured_ MPI
-implementation (MPICH2 v1.4.1 or higher / OpenMPI v1.6 or higher) with
-`MPI_THREAD_MULTIPLE` available on targets that will accept remote
-connections. Processes that are _not_ accepting incoming connections are
-_not_ required to have a multithreaded level of execution.
-
-Optional requirements
----------------------
-
-For optional automatic code generation features (which are used for generating
-serialization and deserialization routines), the preprocessor subset of the
-BOOST library must be included (Boost v1.48 or higher is recommended).
-The library itself is therefore not necessary since only the header is used.
-Mercury includes those headers if one does not have BOOST installed and
-wants to make use of this feature.
-
-Building
-========
-
-If you install the full sources, put the tarball in a directory where you
-have permissions (e.g., your home directory) and unpack it:
-
-    bzip2 -dc mercury-X.tar.bz2 | tar xvf -
-
-Replace `'X'` with the version number of the package.
-
-(Optional) If you checked out the sources using git (without the `--recursive`
-option) and want to build the testing suite (which requires the kwsys
-submodule) or use checksums (which requires the mchecksum submodule), you need
-to issue from the root of the source directory the following command:
-
-    git submodule update --init
-
-Mercury makes use of the CMake build-system and requires that you do an
-out-of-source build. In order to do that, you must create a new build
-directory and run the `ccmake` command from it:
-
-    cd mercury-X
-    mkdir build
-    cd build
-    ccmake .. (where ".." is the relative path to the mercury-X directory)
-
-Type `'c'` multiple times and choose suitable options. Recommended options are:
-
-    BUILD_SHARED_LIBS                ON (or OFF if the library you link
-                                     against requires static libraries)
-    BUILD_TESTING                    ON
-    Boost_INCLUDE_DIR                /path/to/include/directory
-    CMAKE_INSTALL_PREFIX             /path/to/install/directory
-    MERCURY_ENABLE_DEBUG             ON/OFF
-    MERCURY_ENABLE_PARALLEL_TESTING  ON/OFF
-    MERCURY_USE_BOOST_PP             ON
-    MERCURY_USE_CHECKSUMS            ON
-    MERCURY_USE_SYSTEM_BOOST         ON/OFF
-    MERCURY_USE_SYSTEM_MCHECKSUM     ON/OFF
-    MERCURY_USE_XDR                  OFF
-    NA_USE_BMI                       ON/OFF
-    NA_USE_MPI                       ON/OFF
-    NA_USE_CCI                       ON/OFF
-    NA_USE_OFI                       ON/OFF
-    NA_USE_SM                        ON/OFF
-    NA_USE_UCX                       ON/OFF
-
-Setting include directory and library paths may require you to toggle to
-the advanced mode by typing `'t'`. Once you are done and do not see any
-errors, type `'g'` to generate makefiles. Once you exit the CMake
-configuration screen and are ready to build the targets, do:
-
-    make
-
-(Optional) Verbose compile/build output:
-
-This is done by inserting `VERBOSE=1` in the `make` command. E.g.:
-
-    make VERBOSE=1
-
-Installing
-==========
-
-Assuming that the `CMAKE_INSTALL_PREFIX` has been set (see previous step)
-and that you have write permissions to the destination directory, do
-from the build directory:
-
-     make install
-
-Testing
-=======
-
-Tests can be run to check that basic RPC functionality (requests and bulk
-data transfers) is properly working. CTest is used to run the tests,
-simply run from the build directory:
-
-    ctest .
-
-(Optional) Verbose testing:
-
-This is done by inserting `-V` in the `ctest` command.  E.g.:
-
-    ctest -V .
-
-Extra verbose information can be displayed by inserting `-VV`. E.g.:
-
-    ctest -VV .
-
-Some tests run with one server process and X client processes. To change the
-number of client processes that are being used, the `MPIEXEC_MAX_NUMPROCS`
-variable needs to be modified (toggle to advanced mode if you do not see
-it). The default value is automatically detected by CMake based on the number
-of cores that are available.
-Note that you need to run `make` again after the makefile generation
-to use the new value.
-
-FAQ
-===
-
-Below is a list of the most common questions.
-
-- _Q: Why am I getting undefined references to libfabric symbols?_
-
-  A: In rare occasions, multiple copies of the libfabric library are installed
-  on the same system. To make sure that you are using the correct copy of the
-  libfabric library, do:
-
-      ldconfig -p | grep libfabric
-
-  If the library returned is not the one that you would expect, make sure to
-  either set `LD_LIBRARY_PATH` or add an entry in your `/etc/ld.so.conf.d`
-  directory.
-
-- _Q: Is there any logging mechanism?_
-
-  A: To turn on error/warning/debug logs, the `HG_LOG_LEVEL` environment
-  variable can be set to either `error`, `warning` or `debug` values. Note that
-  for debugging output to be printed, the CMake variable `MERCURY_ENABLE_DEBUG`
-  must also be set at compile time. Specific subsystems can be selected using
-  the `HG_LOG_SUBSYS` environment variable.
-
-[mailing-lists]: http://mercury-hpc.github.io/help#mailing-lists
-[documentation]: http://mercury-hpc.github.io/documentation/
-[cci]: http://cci-forum.com/?page_id=46
-[libfabric]: https://github.com/ofiwg/libfabric
-[ucx]: https://openucx.readthedocs.io/en/master/running.html#ucx-build-and-install
-[github-ci-svg]: https://github.com/mercury-hpc/mercury/actions/workflows/ci.yml/badge.svg?branch=master
-[github-ci-link]: https://github.com/mercury-hpc/mercury/actions/workflows/ci.yml
-[mercury-release-svg]: https://img.shields.io/github/release/mercury-hpc/mercury/all.svg
-[mercury-release-link]: https://github.com/mercury-hpc/mercury/releases
-[spack-release-svg]: https://img.shields.io/spack/v/mercury.svg
-[spack-release-link]: https://spack.readthedocs.io/en/latest/package_list.html#mercury
-[yama]: https://www.kernel.org/doc/Documentation/security/Yama.txt
-[mochi-link]: https://github.com/mochi-hpc/
-
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_atomic.h b/src/H5FDsubfiling/mercury/src/util/mercury_atomic.h
deleted file mode 100644
index 54562ad..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_atomic.h
+++ /dev/null
@@ -1,584 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef MERCURY_ATOMIC_H
-#define MERCURY_ATOMIC_H
-
-#include "mercury_util_config.h"
-
-#if defined(_WIN32)
-#define _WINSOCKAPI_
-#include <windows.h>
-typedef struct {
-    volatile LONG value;
-} hg_atomic_int32_t;
-typedef struct {
-    volatile LONGLONG value;
-} hg_atomic_int64_t;
-/* clang-format off */
-#    define HG_ATOMIC_VAR_INIT(x) {(x)}
-/* clang-format on */
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-#ifndef __cplusplus
-#include <stdatomic.h>
-typedef atomic_int  hg_atomic_int32_t;
-#if (HG_UTIL_ATOMIC_LONG_WIDTH == 8) && !defined(__APPLE__)
-typedef atomic_long hg_atomic_int64_t;
-#else
-typedef atomic_llong hg_atomic_int64_t;
-#endif
-#else
-#include <atomic>
-typedef std::atomic_int  hg_atomic_int32_t;
-#if (HG_UTIL_ATOMIC_LONG_WIDTH == 8) && !defined(__APPLE__)
-typedef std::atomic_long hg_atomic_int64_t;
-#else
-typedef std::atomic_llong hg_atomic_int64_t;
-#endif
-using std::atomic_fetch_add_explicit;
-using std::atomic_thread_fence;
-using std::memory_order_acq_rel;
-using std::memory_order_acquire;
-using std::memory_order_release;
-#endif
-#define HG_ATOMIC_VAR_INIT(x) ATOMIC_VAR_INIT(x)
-#elif defined(__APPLE__)
-#include <libkern/OSAtomic.h>
-typedef struct {
-    volatile int32_t value;
-} hg_atomic_int32_t;
-typedef struct {
-    volatile int64_t value;
-} hg_atomic_int64_t;
-/* clang-format off */
-#    define HG_ATOMIC_VAR_INIT(x) {(x)}
-/* clang-format on */
-#else /* GCC 4.7 */
-#if !defined(__GNUC__) || ((__GNUC__ < 4) && (__GNUC_MINOR__ < 7))
-#error "GCC version >= 4.7 required to support built-in atomics."
-#endif
-/* builtins do not require volatile */
-typedef int32_t hg_atomic_int32_t;
-typedef int64_t hg_atomic_int64_t;
-#define HG_ATOMIC_VAR_INIT(x) (x)
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * Init atomic value (32-bit integer).
- *
- * \param ptr [OUT]             pointer to an atomic32 integer
- * \param value [IN]            value
- */
-static HG_UTIL_INLINE void hg_atomic_init32(hg_atomic_int32_t *ptr, int32_t value);
-
-/**
- * Set atomic value (32-bit integer).
- *
- * \param ptr [OUT]             pointer to an atomic32 integer
- * \param value [IN]            value
- */
-static HG_UTIL_INLINE void hg_atomic_set32(hg_atomic_int32_t *ptr, int32_t value);
-
-/**
- * Get atomic value (32-bit integer).
- *
- * \param ptr [OUT]             pointer to an atomic32 integer
- *
- * \return Value of the atomic integer
- */
-static HG_UTIL_INLINE int32_t hg_atomic_get32(hg_atomic_int32_t *ptr);
-
-/**
- * Increment atomic value (32-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic32 integer
- *
- * \return Incremented value
- */
-static HG_UTIL_INLINE int32_t hg_atomic_incr32(hg_atomic_int32_t *ptr);
-
-/**
- * Decrement atomic value (32-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic32 integer
- *
- * \return Decremented value
- */
-static HG_UTIL_INLINE int32_t hg_atomic_decr32(hg_atomic_int32_t *ptr);
-
-/**
- * OR atomic value (32-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic32 integer
- * \param value [IN]            value to OR with
- *
- * \return Original value
- */
-static HG_UTIL_INLINE int32_t hg_atomic_or32(hg_atomic_int32_t *ptr, int32_t value);
-
-/**
- * XOR atomic value (32-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic32 integer
- * \param value [IN]            value to XOR with
- *
- * \return Original value
- */
-static HG_UTIL_INLINE int32_t hg_atomic_xor32(hg_atomic_int32_t *ptr, int32_t value);
-
-/**
- * AND atomic value (32-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic32 integer
- * \param value [IN]            value to AND with
- *
- * \return Original value
- */
-static HG_UTIL_INLINE int32_t hg_atomic_and32(hg_atomic_int32_t *ptr, int32_t value);
-
-/**
- * Compare and swap values (32-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic32 integer
- * \param compare_value [IN]    value to compare to
- * \param swap_value [IN]       value to swap with if ptr value is equal to
- *                              compare value
- *
- * \return true if swapped or false
- */
-static HG_UTIL_INLINE bool hg_atomic_cas32(hg_atomic_int32_t *ptr, int32_t compare_value, int32_t swap_value);
-
-/**
- * Init atomic value (64-bit integer).
- *
- * \param ptr [OUT]             pointer to an atomic32 integer
- * \param value [IN]            value
- */
-static HG_UTIL_INLINE void hg_atomic_init64(hg_atomic_int64_t *ptr, int64_t value);
-
-/**
- * Set atomic value (64-bit integer).
- *
- * \param ptr [OUT]             pointer to an atomic64 integer
- * \param value [IN]            value
- */
-static HG_UTIL_INLINE void hg_atomic_set64(hg_atomic_int64_t *ptr, int64_t value);
-
-/**
- * Get atomic value (64-bit integer).
- *
- * \param ptr [OUT]             pointer to an atomic64 integer
- *
- * \return Value of the atomic integer
- */
-static HG_UTIL_INLINE int64_t hg_atomic_get64(hg_atomic_int64_t *ptr);
-
-/**
- * Increment atomic value (64-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic64 integer
- *
- * \return Incremented value
- */
-static HG_UTIL_INLINE int64_t hg_atomic_incr64(hg_atomic_int64_t *ptr);
-
-/**
- * Decrement atomic value (64-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic64 integer
- *
- * \return Decremented value
- */
-static HG_UTIL_INLINE int64_t hg_atomic_decr64(hg_atomic_int64_t *ptr);
-
-/**
- * OR atomic value (64-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic64 integer
- * \param value [IN]            value to OR with
- *
- * \return Original value
- */
-static HG_UTIL_INLINE int64_t hg_atomic_or64(hg_atomic_int64_t *ptr, int64_t value);
-
-/**
- * XOR atomic value (64-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic64 integer
- * \param value [IN]            value to XOR with
- *
- * \return Original value
- */
-static HG_UTIL_INLINE int64_t hg_atomic_xor64(hg_atomic_int64_t *ptr, int64_t value);
-
-/**
- * AND atomic value (64-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic64 integer
- * \param value [IN]            value to AND with
- *
- * \return Original value
- */
-static HG_UTIL_INLINE int64_t hg_atomic_and64(hg_atomic_int64_t *ptr, int64_t value);
-
-/**
- * Compare and swap values (64-bit integer).
- *
- * \param ptr [IN/OUT]          pointer to an atomic64 integer
- * \param compare_value [IN]    value to compare to
- * \param swap_value [IN]       value to swap with if ptr value is equal to
- *                              compare value
- *
- * \return true if swapped or false
- */
-static HG_UTIL_INLINE bool hg_atomic_cas64(hg_atomic_int64_t *ptr, int64_t compare_value, int64_t swap_value);
-
-/**
- * Memory barrier.
- *
- */
-static HG_UTIL_INLINE void hg_atomic_fence(void);
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE void
-hg_atomic_init32(hg_atomic_int32_t *ptr, int32_t value)
-{
-#if defined(HG_UTIL_HAS_STDATOMIC_H)
-    atomic_init(ptr, value);
-#else
-    hg_atomic_set32(ptr, value);
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE void
-hg_atomic_set32(hg_atomic_int32_t *ptr, int32_t value)
-{
-#if defined(_WIN32)
-    ptr->value = value;
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    atomic_store_explicit(ptr, value, memory_order_release);
-#elif defined(__APPLE__)
-    ptr->value = value;
-#else
-    __atomic_store_n(ptr, value, __ATOMIC_RELEASE);
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int32_t
-hg_atomic_get32(hg_atomic_int32_t *ptr)
-{
-    int32_t ret;
-
-#if defined(_WIN32)
-    ret = ptr->value;
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_load_explicit(ptr, memory_order_acquire);
-#elif defined(__APPLE__)
-    ret        = ptr->value;
-#else
-    ret = __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int32_t
-hg_atomic_incr32(hg_atomic_int32_t *ptr)
-{
-    int32_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedIncrementNoFence(&ptr->value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_add_explicit(ptr, 1, memory_order_acq_rel) + 1;
-#elif defined(__APPLE__)
-    ret        = OSAtomicIncrement32(&ptr->value);
-#else
-    ret = __atomic_fetch_add(ptr, 1, __ATOMIC_ACQ_REL) + 1;
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int32_t
-hg_atomic_decr32(hg_atomic_int32_t *ptr)
-{
-    int32_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedDecrementNoFence(&ptr->value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_sub_explicit(ptr, 1, memory_order_acq_rel) - 1;
-#elif defined(__APPLE__)
-    ret        = OSAtomicDecrement32(&ptr->value);
-#else
-    ret = __atomic_fetch_sub(ptr, 1, __ATOMIC_ACQ_REL) - 1;
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int32_t
-hg_atomic_or32(hg_atomic_int32_t *ptr, int32_t value)
-{
-    int32_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedOrNoFence(&ptr->value, value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_or_explicit(ptr, value, memory_order_acq_rel);
-#elif defined(__APPLE__)
-    ret        = OSAtomicOr32Orig((uint32_t)value, (volatile uint32_t *)&ptr->value);
-#else
-    ret = __atomic_fetch_or(ptr, value, __ATOMIC_ACQ_REL);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int32_t
-hg_atomic_xor32(hg_atomic_int32_t *ptr, int32_t value)
-{
-    int32_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedXorNoFence(&ptr->value, value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_xor_explicit(ptr, value, memory_order_acq_rel);
-#elif defined(__APPLE__)
-    ret        = OSAtomicXor32Orig((uint32_t)value, (volatile uint32_t *)&ptr->value);
-#else
-    ret = __atomic_fetch_xor(ptr, value, __ATOMIC_ACQ_REL);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int32_t
-hg_atomic_and32(hg_atomic_int32_t *ptr, int32_t value)
-{
-    int32_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedAndNoFence(&ptr->value, value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_and_explicit(ptr, value, memory_order_acq_rel);
-#elif defined(__APPLE__)
-    ret        = OSAtomicAnd32Orig((uint32_t)value, (volatile uint32_t *)&ptr->value);
-#else
-    ret = __atomic_fetch_and(ptr, value, __ATOMIC_ACQ_REL);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE bool
-hg_atomic_cas32(hg_atomic_int32_t *ptr, int32_t compare_value, int32_t swap_value)
-{
-    bool ret;
-
-#if defined(_WIN32)
-    ret = (compare_value == InterlockedCompareExchangeNoFence(&ptr->value, swap_value, compare_value));
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_compare_exchange_strong_explicit(ptr, &compare_value, swap_value, memory_order_acq_rel,
-                                                  memory_order_acquire);
-#elif defined(__APPLE__)
-    ret        = OSAtomicCompareAndSwap32(compare_value, swap_value, &ptr->value);
-#else
-    ret = __atomic_compare_exchange_n(ptr, &compare_value, swap_value, false, __ATOMIC_ACQ_REL,
-                                      __ATOMIC_ACQUIRE);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE void
-hg_atomic_init64(hg_atomic_int64_t *ptr, int64_t value)
-{
-#if defined(HG_UTIL_HAS_STDATOMIC_H)
-    atomic_init(ptr, value);
-#else
-    hg_atomic_set64(ptr, value);
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE void
-hg_atomic_set64(hg_atomic_int64_t *ptr, int64_t value)
-{
-#if defined(_WIN32)
-    ptr->value = value;
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    atomic_store_explicit(ptr, value, memory_order_release);
-#elif defined(__APPLE__)
-    ptr->value = value;
-#else
-    __atomic_store_n(ptr, value, __ATOMIC_RELEASE);
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int64_t
-hg_atomic_get64(hg_atomic_int64_t *ptr)
-{
-    int64_t ret;
-
-#if defined(_WIN32)
-    ret = ptr->value;
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_load_explicit(ptr, memory_order_acquire);
-#elif defined(__APPLE__)
-    ptr->value = value;
-#else
-    ret = __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int64_t
-hg_atomic_incr64(hg_atomic_int64_t *ptr)
-{
-    int64_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedIncrementNoFence64(&ptr->value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_add_explicit(ptr, (int64_t)1, memory_order_acq_rel) + 1;
-#elif defined(__APPLE__)
-    ret        = OSAtomicIncrement64(&ptr->value);
-#else
-    ret = __atomic_fetch_add(ptr, (int64_t)1, __ATOMIC_ACQ_REL) + 1;
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int64_t
-hg_atomic_decr64(hg_atomic_int64_t *ptr)
-{
-    int64_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedDecrementNoFence64(&ptr->value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_sub_explicit(ptr, (int64_t)1, memory_order_acq_rel) - 1;
-#elif defined(__APPLE__)
-    ret        = OSAtomicDecrement64(&ptr->value);
-#else
-    ret = __atomic_fetch_sub(ptr, (int64_t)1, __ATOMIC_ACQ_REL) - 1;
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int64_t
-hg_atomic_or64(hg_atomic_int64_t *ptr, int64_t value)
-{
-    int64_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedOr64NoFence(&ptr->value, value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_or_explicit(ptr, value, memory_order_acq_rel);
-#else
-    ret        = __atomic_fetch_or(ptr, value, __ATOMIC_ACQ_REL);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int64_t
-hg_atomic_xor64(hg_atomic_int64_t *ptr, int64_t value)
-{
-    int64_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedXor64NoFence(&ptr->value, value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_xor_explicit(ptr, value, memory_order_acq_rel);
-#else
-    ret        = __atomic_fetch_xor(ptr, value, __ATOMIC_ACQ_REL);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int64_t
-hg_atomic_and64(hg_atomic_int64_t *ptr, int64_t value)
-{
-    int64_t ret;
-
-#if defined(_WIN32)
-    ret = InterlockedAnd64NoFence(&ptr->value, value);
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_fetch_and_explicit(ptr, value, memory_order_acq_rel);
-#else
-    ret        = __atomic_fetch_and(ptr, value, __ATOMIC_ACQ_REL);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE bool
-hg_atomic_cas64(hg_atomic_int64_t *ptr, int64_t compare_value, int64_t swap_value)
-{
-    bool ret;
-
-#if defined(_WIN32)
-    ret = (compare_value == InterlockedCompareExchangeNoFence64(&ptr->value, swap_value, compare_value));
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    ret = atomic_compare_exchange_strong_explicit(ptr, &compare_value, swap_value, memory_order_acq_rel,
-                                                  memory_order_acquire);
-#elif defined(__APPLE__)
-    ret        = OSAtomicCompareAndSwap64(compare_value, swap_value, &ptr->value);
-#else
-    ret = __atomic_compare_exchange_n(ptr, &compare_value, swap_value, false, __ATOMIC_ACQ_REL,
-                                      __ATOMIC_ACQUIRE);
-#endif
-
-    return ret;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE void
-hg_atomic_fence(void)
-{
-#if defined(_WIN32)
-    MemoryBarrier();
-#elif defined(HG_UTIL_HAS_STDATOMIC_H)
-    atomic_thread_fence(memory_order_acq_rel);
-#elif defined(__APPLE__)
-    OSMemoryBarrier();
-#else
-    __atomic_thread_fence(__ATOMIC_ACQ_REL);
-#endif
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* MERCURY_ATOMIC_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_compiler_attributes.h b/src/H5FDsubfiling/mercury/src/util/mercury_compiler_attributes.h
index 2406ba8..d2b8ed1 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_compiler_attributes.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_compiler_attributes.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -44,73 +45,4 @@
 #define HG_ATTR_ABI_HIDDEN
 #endif
 
-/* Unused return values */
-#if defined(_WIN32)
-#define HG_ATTR_WARN_UNUSED_RESULT _Check_return_
-#elif __has_attribute(__warn_unused_result__)
-#define HG_ATTR_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
-#else
-#define HG_ATTR_WARN_UNUSED_RESULT
-#endif
-
-/* Remove warnings when plugin does not use callback arguments */
-#if defined(_WIN32)
-#define HG_ATTR_UNUSED
-#elif __has_attribute(__unused__)
-#define HG_ATTR_UNUSED __attribute__((__unused__))
-#else
-#define HG_ATTR_UNUSED
-#endif
-
-/* Alignment (not optional) */
-#if defined(_WIN32)
-#define HG_ATTR_ALIGNED(x, a) __declspec(align(a)) x
-#else
-#define HG_ATTR_ALIGNED(x, a) x __attribute__((__aligned__(a)))
-#endif
-
-/* Packed (not optional) */
-#if defined(_WIN32)
-#define HG_ATTR_PACKED_PUSH __pragma(pack(push, 1))
-#define HG_ATTR_PACKED_POP  __pragma(pack(pop))
-#else
-#define HG_ATTR_PACKED_PUSH
-#define HG_ATTR_PACKED_POP __attribute__((__packed__))
-#endif
-#define HG_ATTR_PACKED(x) HG_ATTR_PACKED_PUSH x HG_ATTR_PACKED_POP
-
-/* Check format arguments */
-#if defined(_WIN32)
-#define HG_ATTR_PRINTF(_fmt, _firstarg)
-#elif __has_attribute(__format__)
-#define HG_ATTR_PRINTF(_fmt, _firstarg) __attribute__((__format__(printf, _fmt, _firstarg)))
-#else
-#define HG_ATTR_PRINTF(_fmt, _firstarg)
-#endif
-
-/* Constructor (not optional) */
-#if defined(_WIN32)
-#define HG_ATTR_CONSTRUCTOR
-#define HG_ATTR_CONSTRUCTOR_PRIORITY(x)
-#else
-#define HG_ATTR_CONSTRUCTOR             __attribute__((__constructor__))
-#define HG_ATTR_CONSTRUCTOR_PRIORITY(x) __attribute__((__constructor__(x)))
-#endif
-
-/* Destructor (not optional) */
-#if defined(_WIN32)
-#define HG_ATTR_DESTRUCTOR
-#else
-#define HG_ATTR_DESTRUCTOR __attribute__((__destructor__))
-#endif
-
-/* Fallthrough (prevent icc from throwing warnings) */
-#if defined(_WIN32) /* clang-format off */
-#    define HG_ATTR_FALLTHROUGH do {} while (0) /* fallthrough */ /* clang-format on */
-#elif __has_attribute(__fallthrough__) && !defined(__INTEL_COMPILER)
-#define HG_ATTR_FALLTHROUGH __attribute__((__fallthrough__))
-#else /* clang-format off */
-#    define HG_ATTR_FALLTHROUGH do {} while (0) /* fallthrough */
-#endif /* clang-format on */
-
 #endif /* MERCURY_COMPILER_ATTRIBUTES_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_dlog.c b/src/H5FDsubfiling/mercury/src/util/mercury_dlog.c
deleted file mode 100644
index 2589795..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_dlog.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include "mercury_dlog.h"
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#ifdef _WIN32
-#include <process.h>
-#else
-#include <unistd.h>
-#endif
-
-/****************/
-/* Local Macros */
-/****************/
-
-/************************************/
-/* Local Type and Struct Definition */
-/************************************/
-
-/********************/
-/* Local Prototypes */
-/********************/
-
-/*******************/
-/* Local Variables */
-/*******************/
-
-/*---------------------------------------------------------------------------*/
-struct hg_dlog *
-hg_dlog_alloc(char *name, unsigned int lesize, int leloop)
-{
-    struct hg_dlog_entry *le;
-    struct hg_dlog       *d;
-
-    le = malloc(sizeof(*le) * lesize);
-    if (!le)
-        return NULL;
-
-    d = malloc(sizeof(*d));
-    if (!d) {
-        free(le);
-        return NULL;
-    }
-
-    memset(d, 0, sizeof(*d));
-    snprintf(d->dlog_magic, sizeof(d->dlog_magic), "%s%s", HG_DLOG_STDMAGIC, name);
-    hg_thread_mutex_init(&d->dlock);
-    HG_LIST_INIT(&d->cnts32);
-    HG_LIST_INIT(&d->cnts64);
-    d->le      = le;
-    d->lesize  = lesize;
-    d->leloop  = leloop;
-    d->mallocd = 1;
-
-    return d;
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_free(struct hg_dlog *d)
-{
-    struct hg_dlog_dcount32 *cp32 = HG_LIST_FIRST(&d->cnts32);
-    struct hg_dlog_dcount64 *cp64 = HG_LIST_FIRST(&d->cnts64);
-
-    while (cp32) {
-        struct hg_dlog_dcount32 *cp = cp32;
-        cp32                        = HG_LIST_NEXT(cp, l);
-        free(cp);
-    }
-    HG_LIST_INIT(&d->cnts32);
-
-    while (cp64) {
-        struct hg_dlog_dcount64 *cp = cp64;
-        cp64                        = HG_LIST_NEXT(cp, l);
-        free(cp);
-    }
-    HG_LIST_INIT(&d->cnts64);
-
-    if (d->mallocd) {
-        free(d->le);
-        free(d);
-    }
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_mkcount32(struct hg_dlog *d, hg_atomic_int32_t **cptr, const char *name, const char *descr)
-{
-    struct hg_dlog_dcount32 *dcnt;
-
-    hg_thread_mutex_lock(&d->dlock);
-    if (*cptr == NULL) {
-        dcnt = malloc(sizeof(*dcnt));
-        if (!dcnt) {
-            fprintf(stderr, "hd_dlog_mkcount: malloc of %s failed!", name);
-            abort();
-        }
-        dcnt->name  = name;
-        dcnt->descr = descr;
-        hg_atomic_init32(&dcnt->c, 0);
-        HG_LIST_INSERT_HEAD(&d->cnts32, dcnt, l);
-        *cptr = &dcnt->c; /* set it in caller's variable */
-    }
-    hg_thread_mutex_unlock(&d->dlock);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_mkcount64(struct hg_dlog *d, hg_atomic_int64_t **cptr, const char *name, const char *descr)
-{
-    struct hg_dlog_dcount64 *dcnt;
-
-    hg_thread_mutex_lock(&d->dlock);
-    if (*cptr == NULL) {
-        dcnt = malloc(sizeof(*dcnt));
-        if (!dcnt) {
-            fprintf(stderr, "hd_dlog_mkcount: malloc of %s failed!", name);
-            abort();
-        }
-        dcnt->name  = name;
-        dcnt->descr = descr;
-        hg_atomic_init64(&dcnt->c, 0);
-        HG_LIST_INSERT_HEAD(&d->cnts64, dcnt, l);
-        *cptr = &dcnt->c; /* set it in caller's variable */
-    }
-    hg_thread_mutex_unlock(&d->dlock);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_setlogstop(struct hg_dlog *d, int stop)
-{
-    d->lestop = stop; /* no need to lock */
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_resetlog(struct hg_dlog *d)
-{
-    hg_thread_mutex_lock(&d->dlock);
-    d->lefree = 0;
-    d->leadds = 0;
-    hg_thread_mutex_unlock(&d->dlock);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_dump(struct hg_dlog *d, int (*log_func)(FILE *, const char *, ...), FILE *stream, int trylock)
-{
-    unsigned int             left, idx;
-    struct hg_dlog_dcount32 *dc32;
-    struct hg_dlog_dcount64 *dc64;
-
-    if (trylock) {
-        int try_ret = hg_thread_mutex_try_lock(&d->dlock);
-        if (try_ret != HG_UTIL_SUCCESS) /* warn them, but keep going */ {
-            fprintf(stderr, "hg_dlog_dump: WARN - lock failed\n");
-            return;
-        }
-    }
-    else
-        hg_thread_mutex_lock(&d->dlock);
-
-    if (d->leadds > 0) {
-        log_func(stream,
-                 "### ----------------------\n"
-                 "### (%s) debug log summary\n"
-                 "### ----------------------\n",
-                 (d->dlog_magic + strlen(HG_DLOG_STDMAGIC)));
-        if (!HG_LIST_IS_EMPTY(&d->cnts32) && !HG_LIST_IS_EMPTY(&d->cnts64)) {
-            log_func(stream, "# Counters\n");
-            HG_LIST_FOREACH(dc32, &d->cnts32, l)
-            {
-                log_func(stream, "# %s: %" PRId32 " [%s]\n", dc32->name, hg_atomic_get32(&dc32->c),
-                         dc32->descr);
-            }
-            HG_LIST_FOREACH(dc64, &d->cnts64, l)
-            {
-                log_func(stream, "# %s: %" PRId64 " [%s]\n", dc64->name, hg_atomic_get64(&dc64->c),
-                         dc64->descr);
-            }
-            log_func(stream, "# -\n");
-        }
-
-        log_func(stream, "# Number of log entries: %d\n", d->leadds);
-
-        idx  = (d->lefree < d->leadds) ? d->lesize + d->lefree - d->leadds : d->lefree - d->leadds;
-        left = d->leadds;
-        while (left--) {
-            log_func(stream, "# [%lf] %s:%d\n## %s()\n", hg_time_to_double(d->le[idx].time), d->le[idx].file,
-                     d->le[idx].line, d->le[idx].func);
-            idx = (idx + 1) % d->lesize;
-        }
-    }
-
-    hg_thread_mutex_unlock(&d->dlock);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_dump_counters(struct hg_dlog *d, int (*log_func)(FILE *, const char *, ...), FILE *stream,
-                      int trylock)
-{
-    struct hg_dlog_dcount32 *dc32;
-    struct hg_dlog_dcount64 *dc64;
-
-    if (trylock) {
-        int try_ret = hg_thread_mutex_try_lock(&d->dlock);
-        if (try_ret != HG_UTIL_SUCCESS) /* warn them, but keep going */ {
-            fprintf(stderr, "hg_dlog_dump: WARN - lock failed\n");
-            return;
-        }
-    }
-    else
-        hg_thread_mutex_lock(&d->dlock);
-
-    if (!HG_LIST_IS_EMPTY(&d->cnts32) || !HG_LIST_IS_EMPTY(&d->cnts64)) {
-        log_func(stream,
-                 "### ----------------------\n"
-                 "### (%s) counter log summary\n"
-                 "### ----------------------\n",
-                 (d->dlog_magic + strlen(HG_DLOG_STDMAGIC)));
-
-        log_func(stream, "# Counters\n");
-        HG_LIST_FOREACH(dc32, &d->cnts32, l)
-        {
-            log_func(stream, "# %s: %" PRId32 " [%s]\n", dc32->name, hg_atomic_get32(&dc32->c), dc32->descr);
-        }
-        HG_LIST_FOREACH(dc64, &d->cnts64, l)
-        {
-            log_func(stream, "# %s: %" PRId64 " [%s]\n", dc64->name, hg_atomic_get64(&dc64->c), dc64->descr);
-        }
-        log_func(stream, "# -\n");
-    }
-
-    hg_thread_mutex_unlock(&d->dlock);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_dlog_dump_file(struct hg_dlog *d, const char *base, int addpid, int trylock)
-{
-    char                     buf[2048];
-    int                      pid;
-    FILE                    *fp = NULL;
-    unsigned int             left, idx;
-    struct hg_dlog_dcount32 *dc32;
-    struct hg_dlog_dcount64 *dc64;
-
-#ifdef _WIN32
-    pid = _getpid();
-#else
-    pid = getpid();
-#endif
-
-    if (addpid)
-        snprintf(buf, sizeof(buf), "%s-%d.log", base, pid);
-    else
-        snprintf(buf, sizeof(buf), "%s.log", base);
-
-    fp = fopen(buf, "w");
-    if (!fp) {
-        perror("fopen");
-        return;
-    }
-
-    if (trylock) {
-        int try_ret = hg_thread_mutex_try_lock(&d->dlock);
-        if (try_ret != HG_UTIL_SUCCESS) /* warn them, but keep going */ {
-            fprintf(stderr, "hg_dlog_dump: WARN - lock failed\n");
-            fclose(fp);
-            return;
-        }
-    }
-    else
-        hg_thread_mutex_lock(&d->dlock);
-
-    fprintf(fp, "# START COUNTERS\n");
-    HG_LIST_FOREACH(dc32, &d->cnts32, l)
-    {
-        fprintf(fp, "%s %d %" PRId32 " # %s\n", dc32->name, pid, hg_atomic_get32(&dc32->c), dc32->descr);
-    }
-    HG_LIST_FOREACH(dc64, &d->cnts64, l)
-    {
-        fprintf(fp, "%s %d %" PRId64 " # %s\n", dc64->name, pid, hg_atomic_get64(&dc64->c), dc64->descr);
-    }
-    fprintf(fp, "# END COUNTERS\n\n");
-
-    fprintf(fp, "# NLOGS %d FOR %d\n", d->leadds, pid);
-
-    idx  = (d->lefree < d->leadds) ? d->lesize + d->lefree - d->leadds : d->lefree - d->leadds;
-    left = d->leadds;
-    while (left--) {
-        fprintf(fp, "%lf %d %s %u %s %s %p\n", hg_time_to_double(d->le[idx].time), pid, d->le[idx].file,
-                d->le[idx].line, d->le[idx].func, d->le[idx].msg, d->le[idx].data);
-        idx = (idx + 1) % d->lesize;
-    }
-
-    hg_thread_mutex_unlock(&d->dlock);
-    fclose(fp);
-}
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_dlog.h b/src/H5FDsubfiling/mercury/src/util/mercury_dlog.h
deleted file mode 100644
index 3c374b5..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_dlog.h
+++ /dev/null
@@ -1,282 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef MERCURY_DLOG_H
-#define MERCURY_DLOG_H
-
-#include "mercury_util_config.h"
-
-#include "mercury_atomic.h"
-#include "mercury_list.h"
-#include "mercury_thread_mutex.h"
-#include "mercury_time.h"
-
-#include <stdio.h>
-
-/*****************/
-/* Public Macros */
-/*****************/
-
-/*
- * putting a magic number at the front of the dlog allows us to search
- * for a dlog in a coredump file after a crash and examine its contents.
- */
-#define HG_DLOG_MAGICLEN 16         /* bytes to reserve for magic# */
-#define HG_DLOG_STDMAGIC ">D.LO.G<" /* standard for first 8 bytes */
-
-/*
- * HG_DLOG_INITIALIZER: initializer for a dlog in a global variable.
- * LESIZE is the number of entries in the LE array.  use it like this:
- *
- * #define FOO_NENTS 128
- * struct hg_dlog_entry foo_le[FOO_NENTS];
- * struct hg_dlog foo_dlog = HG_DLOG_INITIALIZER("foo", foo_le, FOO_NENTS, 0);
- */
-#define HG_DLOG_INITIALIZER(NAME, LE, LESIZE, LELOOP)                                                        \
-    {                                                                                                        \
-        HG_DLOG_STDMAGIC NAME, HG_THREAD_MUTEX_INITIALIZER, HG_LIST_HEAD_INITIALIZER(cnts32),                \
-            HG_LIST_HEAD_INITIALIZER(cnts64), LE, LESIZE, LELOOP, 0, 0, 0, 0                                 \
-    }
-
-/*************************************/
-/* Public Type and Struct Definition */
-/*************************************/
-
-/*
- * hg_dlog_entry: an entry in the dlog
- */
-struct hg_dlog_entry {
-    const char  *file; /* file name */
-    unsigned int line; /* line number */
-    const char  *func; /* function name */
-    const char  *msg;  /* entry message (optional) */
-    const void  *data; /* user data (optional) */
-    hg_time_t    time; /* time added to log */
-};
-
-/*
- * hg_dlog_dcount32: 32-bit debug counter in the dlog
- */
-struct hg_dlog_dcount32 {
-    const char       *name;            /* counter name (short) */
-    const char       *descr;           /* description of counter */
-    hg_atomic_int32_t c;               /* the counter itself */
-    HG_LIST_ENTRY(hg_dlog_dcount32) l; /* linkage */
-};
-
-/*
- * hg_dlog_dcount64: 64-bit debug counter in the dlog
- */
-struct hg_dlog_dcount64 {
-    const char       *name;            /* counter name (short) */
-    const char       *descr;           /* description of counter */
-    hg_atomic_int64_t c;               /* the counter itself */
-    HG_LIST_ENTRY(hg_dlog_dcount64) l; /* linkage */
-};
-
-/*
- * hg_dlog: main structure
- */
-struct hg_dlog {
-    char              dlog_magic[HG_DLOG_MAGICLEN]; /* magic number + name */
-    hg_thread_mutex_t dlock;                        /* lock for this data struct */
-
-    /* counter lists */
-    HG_LIST_HEAD(hg_dlog_dcount32) cnts32; /* counter list */
-    HG_LIST_HEAD(hg_dlog_dcount64) cnts64; /* counter list */
-
-    /* log */
-    struct hg_dlog_entry *le;     /* array of log entries */
-    unsigned int          lesize; /* size of le[] array */
-    int                   leloop; /* circular buffer? */
-    unsigned int          lefree; /* next free entry in le[] */
-    unsigned int          leadds; /* #adds done if < lesize */
-    int                   lestop; /* stop taking new logs */
-
-    int mallocd; /* allocated with malloc? */
-};
-
-/*********************/
-/* Public Prototypes */
-/*********************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * malloc and return a new dlog
- *
- * \param name [IN]             name of dlog (truncated past 8 bytes)
- * \param lesize [IN]           number of entries to allocate for log buffer
- * \param leloop [IN]           set to make log circular (can overwrite old
- *                              entries)
- *
- * \return the new dlog or NULL on malloc error
- */
-HG_UTIL_PUBLIC struct hg_dlog *hg_dlog_alloc(char *name, unsigned int lesize, int leloop);
-
-/**
- * free anything we malloc'd on a dlog.  assumes we have the final
- * active reference to dlog  and it won't be used anymore after this
- * call (so no need to lock it).
- *
- * \param d [IN]                the dlog to finalize
- */
-HG_UTIL_PUBLIC void hg_dlog_free(struct hg_dlog *d);
-
-/**
- * make a named atomic32 counter in a dlog and return a pointer to
- * it.  we use the dlock to ensure a counter under a given name only
- * gets created once (makes it easy to share a counter across files).
- * aborts if unable to alloc counter.  use it like this:
- *
- * hg_atomic_int32_t *foo_count;
- * static int init = 0;
- * if (init == 0) {
- *   hg_dlog_mkcount32(dlog, &foo_count, "foocount", "counts of foo");
- *   init = 1;
- * }
- *
- * \param d [IN]                dlog to create the counter in
- * \param cptr [IN/OUT]         pointer to use for counter (set to NULL to
- *                              start)
- * \param name [IN]             short one word name for counter
- * \param descr [IN]            short description of counter
- */
-HG_UTIL_PUBLIC void hg_dlog_mkcount32(struct hg_dlog *d, hg_atomic_int32_t **cptr, const char *name,
-                                      const char *descr);
-
-/**
- * make a named atomic64 counter in a dlog and return a pointer to
- * it.  we use the dlock to ensure a counter under a given name only
- * gets created once (makes it easy to share a counter across files).
- * aborts if unable to alloc counter.  use it like this:
- *
- * hg_atomic_int64_t *foo_count;
- * static int init = 0;
- * if (init == 0) {
- *   hg_dlog_mkcount64(dlog, &foo_count, "foocount", "counts of foo");
- *   init = 1;
- * }
- *
- * \param d [IN]                dlog to create the counter in
- * \param cptr [IN/OUT]         pointer to use for counter (set to NULL to
- *                              start)
- * \param name [IN]             short one word name for counter
- * \param descr [IN]            short description of counter
- */
-HG_UTIL_PUBLIC void hg_dlog_mkcount64(struct hg_dlog *d, hg_atomic_int64_t **cptr, const char *name,
-                                      const char *descr);
-
-/**
- * attempt to add a log record to a dlog.  the id and msg should point
- * to static strings that are valid throughout the life of the program
- * (not something that is on the stack).
- *
- * \param d [IN]                the dlog to add the log record to
- * \param file [IN]             file entry
- * \param line [IN]             line entry
- * \param func [IN]             func entry
- * \param msg [IN]              log entry message (optional, NULL ok)
- * \param data [IN]             user data pointer for record (optional, NULL ok)
- *
- * \return 1 if added, 0 otherwise
- */
-static HG_UTIL_INLINE unsigned int hg_dlog_addlog(struct hg_dlog *d, const char *file, unsigned int line,
-                                                  const char *func, const char *msg, const void *data);
-
-/**
- * set the value of stop for a dlog (to enable/disable logging)
- *
- * \param d [IN]                dlog to set stop in
- * \param stop [IN]             value of stop to use (1=stop, 0=go)
- */
-HG_UTIL_PUBLIC void hg_dlog_setlogstop(struct hg_dlog *d, int stop);
-
-/**
- * reset the log.  this does not change the counters (since users
- * have direct access to the hg_atomic_int64_t's, we don't need
- * an API to change them here).
- *
- * \param d [IN]                dlog to reset
- */
-HG_UTIL_PUBLIC void hg_dlog_resetlog(struct hg_dlog *d);
-
-/**
- * dump dlog info to a stream. set trylock if you want to dump even
- * if it is locked (e.g. you are crashing and you don't care about
- * locking).
- *
- * \param d [IN]                dlog to dump
- * \param log_func [IN]         log function to use (default printf)
- * \param stream [IN]           stream to use
- * \param trylock [IN]          just try to lock (warn if it fails)
- */
-HG_UTIL_PUBLIC void hg_dlog_dump(struct hg_dlog *d, int (*log_func)(FILE *, const char *, ...), FILE *stream,
-                                 int trylock);
-
-/**
- * dump dlog counters to a stream. set trylock if you want to dump even
- * if it is locked (e.g. you are crashing and you don't care about
- * locking).
- *
- * \param d [IN]                dlog to dump
- * \param log_func [IN]         log function to use (default printf)
- * \param stream [IN]           stream to use
- * \param trylock [IN]          just try to lock (warn if it fails)
- */
-HG_UTIL_PUBLIC void hg_dlog_dump_counters(struct hg_dlog *d, int (*log_func)(FILE *, const char *, ...),
-                                          FILE *stream, int trylock);
-
-/**
- * dump dlog info to a file.   set trylock if you want to dump even
- * if it is locked (e.g. you are crashing and you don't care about
- * locking).  the output file is "base.log" or base-pid.log" depending
- * on the value of addpid.
- *
- * \param d [IN]                dlog to dump
- * \param base [IN]             output file basename
- * \param addpid [IN]           add pid to output filename
- * \param trylock [IN]          just try to lock (warn if it fails)
- */
-HG_UTIL_PUBLIC void hg_dlog_dump_file(struct hg_dlog *d, const char *base, int addpid, int trylock);
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE unsigned int
-hg_dlog_addlog(struct hg_dlog *d, const char *file, unsigned int line, const char *func, const char *msg,
-               const void *data)
-{
-    unsigned int rv = 0;
-    unsigned int idx;
-
-    hg_thread_mutex_lock(&d->dlock);
-    if (d->lestop)
-        goto done;
-    if (d->leloop == 0 && d->leadds >= d->lesize)
-        goto done;
-    idx       = d->lefree;
-    d->lefree = (d->lefree + 1) % d->lesize;
-    if (d->leadds < d->lesize)
-        d->leadds++;
-    d->le[idx].file = file;
-    d->le[idx].line = line;
-    d->le[idx].func = func;
-    d->le[idx].msg  = msg;
-    d->le[idx].data = data;
-    hg_time_get_current(&d->le[idx].time);
-    rv = 1;
-
-done:
-    hg_thread_mutex_unlock(&d->dlock);
-    return rv;
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* MERCURY_DLOG_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_list.h b/src/H5FDsubfiling/mercury/src/util/mercury_list.h
deleted file mode 100644
index 1de32c5..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_list.h
+++ /dev/null
@@ -1,113 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-/* Code below is derived from sys/queue.h which follows the below notice:
- *
- * Copyright (c) 1991, 1993
- *  The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *  @(#)queue.h 8.5 (Berkeley) 8/20/94
- */
-
-#ifndef MERCURY_LIST_H
-#define MERCURY_LIST_H
-
-#define HG_LIST_HEAD_INITIALIZER(name)                                                                       \
-    {                                                                                                        \
-        NULL                                                                                                 \
-    }
-
-#define HG_LIST_HEAD_INIT(struct_head_name, var_name)                                                        \
-    struct struct_head_name var_name = HG_LIST_HEAD_INITIALIZER(var_name)
-
-#define HG_LIST_HEAD_DECL(struct_head_name, struct_entry_name)                                               \
-    struct struct_head_name {                                                                                \
-        struct struct_entry_name *head;                                                                      \
-    }
-
-#define HG_LIST_HEAD(struct_entry_name)                                                                      \
-    struct {                                                                                                 \
-        struct struct_entry_name *head;                                                                      \
-    }
-
-#define HG_LIST_ENTRY(struct_entry_name)                                                                     \
-    struct {                                                                                                 \
-        struct struct_entry_name  *next;                                                                     \
-        struct struct_entry_name **prev;                                                                     \
-    }
-
-#define HG_LIST_INIT(head_ptr)                                                                               \
-    do {                                                                                                     \
-        (head_ptr)->head = NULL;                                                                             \
-    } while (/*CONSTCOND*/ 0)
-
-#define HG_LIST_IS_EMPTY(head_ptr) ((head_ptr)->head == NULL)
-
-#define HG_LIST_FIRST(head_ptr) ((head_ptr)->head)
-
-#define HG_LIST_NEXT(entry_ptr, entry_field_name) ((entry_ptr)->entry_field_name.next)
-
-#define HG_LIST_INSERT_AFTER(list_entry_ptr, entry_ptr, entry_field_name)                                    \
-    do {                                                                                                     \
-        if (((entry_ptr)->entry_field_name.next = (list_entry_ptr)->entry_field_name.next) != NULL)          \
-            (list_entry_ptr)->entry_field_name.next->entry_field_name.prev =                                 \
-                &(entry_ptr)->entry_field_name.next;                                                         \
-        (list_entry_ptr)->entry_field_name.next = (entry_ptr);                                               \
-        (entry_ptr)->entry_field_name.prev      = &(list_entry_ptr)->entry_field_name.next;                  \
-    } while (/*CONSTCOND*/ 0)
-
-#define HG_LIST_INSERT_BEFORE(list_entry_ptr, entry_ptr, entry_field_name)                                   \
-    do {                                                                                                     \
-        (entry_ptr)->entry_field_name.prev       = (list_entry_ptr)->entry_field_name.prev;                  \
-        (entry_ptr)->entry_field_name.next       = (list_entry_ptr);                                         \
-        *(list_entry_ptr)->entry_field_name.prev = (entry_ptr);                                              \
-        (list_entry_ptr)->entry_field_name.prev  = &(entry_ptr)->entry_field_name.next;                      \
-    } while (/*CONSTCOND*/ 0)
-
-#define HG_LIST_INSERT_HEAD(head_ptr, entry_ptr, entry_field_name)                                           \
-    do {                                                                                                     \
-        if (((entry_ptr)->entry_field_name.next = (head_ptr)->head) != NULL)                                 \
-            (head_ptr)->head->entry_field_name.prev = &(entry_ptr)->entry_field_name.next;                   \
-        (head_ptr)->head                   = (entry_ptr);                                                    \
-        (entry_ptr)->entry_field_name.prev = &(head_ptr)->head;                                              \
-    } while (/*CONSTCOND*/ 0)
-
-/* TODO would be nice to not have any condition */
-#define HG_LIST_REMOVE(entry_ptr, entry_field_name)                                                          \
-    do {                                                                                                     \
-        if ((entry_ptr)->entry_field_name.next != NULL)                                                      \
-            (entry_ptr)->entry_field_name.next->entry_field_name.prev = (entry_ptr)->entry_field_name.prev;  \
-        *(entry_ptr)->entry_field_name.prev = (entry_ptr)->entry_field_name.next;                            \
-    } while (/*CONSTCOND*/ 0)
-
-#define HG_LIST_FOREACH(var, head_ptr, entry_field_name)                                                     \
-    for ((var) = ((head_ptr)->head); (var); (var) = ((var)->entry_field_name.next))
-
-#endif /* MERCURY_LIST_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_log.c b/src/H5FDsubfiling/mercury/src/util/mercury_log.c
deleted file mode 100644
index f77ba23..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_log.c
+++ /dev/null
@@ -1,498 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include "mercury_log.h"
-
-#include <ctype.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-
-/****************/
-/* Local Macros */
-/****************/
-
-/* Make sure it executes first */
-#ifdef HG_UTIL_HAS_ATTR_CONSTRUCTOR_PRIORITY
-#define HG_UTIL_CONSTRUCTOR_1 HG_ATTR_CONSTRUCTOR_PRIORITY(101)
-#else
-#define HG_UTIL_CONSTRUCTOR_1
-#endif
-
-/* Destructor (used to finalize log outlets) */
-#define HG_UTIL_DESTRUCTOR HG_ATTR_DESTRUCTOR
-
-/* Max number of subsystems that can be tracked */
-#define HG_LOG_SUBSYS_MAX (16)
-
-/* Max length of subsystem name (without trailing \0) */
-#define HG_LOG_SUBSYS_NAME_MAX (16)
-
-/* Log buffer size */
-#define HG_LOG_BUF_MAX (256)
-
-#ifdef HG_UTIL_HAS_LOG_COLOR
-#define HG_LOG_ESC     "\033"
-#define HG_LOG_RESET   HG_LOG_ESC "[0m"
-#define HG_LOG_REG     HG_LOG_ESC "[0;"
-#define HG_LOG_BOLD    HG_LOG_ESC "[1;"
-#define HG_LOG_RED     "31m"
-#define HG_LOG_GREEN   "32m"
-#define HG_LOG_YELLOW  "33m"
-#define HG_LOG_BLUE    "34m"
-#define HG_LOG_MAGENTA "35m"
-#define HG_LOG_CYAN    "36m"
-#endif
-
-/********************/
-/* Local Prototypes */
-/********************/
-
-/* Init logs */
-static void hg_log_init(void) HG_UTIL_CONSTRUCTOR_1;
-
-/* Finalize logs */
-static void hg_log_finalize(void) HG_UTIL_DESTRUCTOR;
-
-/* Init log level */
-static void hg_log_init_level(void);
-
-/* Init log subsys */
-static void hg_log_init_subsys(void);
-
-/* Reset all log levels */
-static void hg_log_outlet_reset_all(void);
-
-/* Free all attached logs */
-static void hg_log_free_dlogs(void);
-
-/* Is log active */
-static int hg_log_outlet_active(const char *name);
-
-/* Update log level of outlet */
-static void hg_log_outlet_update_level(struct hg_log_outlet *hg_log_outlet);
-
-/* Update level of all outlets */
-static void hg_log_outlet_update_all(void);
-
-/*******************/
-/* Local Variables */
-/*******************/
-
-/* Default log outlet */
-HG_LOG_OUTLET_DECL(hg) = HG_LOG_OUTLET_INITIALIZER(hg, HG_LOG_OFF, NULL, NULL);
-
-/* List of all registered outlets */
-static HG_QUEUE_HEAD(hg_log_outlet) hg_log_outlets_g = HG_QUEUE_HEAD_INITIALIZER(hg_log_outlets_g);
-
-/* Default 'printf' log function */
-static hg_log_func_t hg_log_func_g = fprintf;
-
-/* Default log level */
-static enum hg_log_level hg_log_level_g = HG_LOG_LEVEL_ERROR;
-
-/* Default log subsystems */
-static char hg_log_subsys_g[HG_LOG_SUBSYS_MAX][HG_LOG_SUBSYS_NAME_MAX + 1] = {{"\0"}};
-
-/* Log level string table */
-#define X(a, b, c) b,
-static const char *const hg_log_level_name_g[] = {HG_LOG_LEVELS};
-#undef X
-
-/* Standard log streams */
-#define X(a, b, c) c,
-static FILE **const hg_log_std_streams_g[] = {HG_LOG_LEVELS};
-#undef X
-static FILE *hg_log_streams_g[HG_LOG_LEVEL_MAX] = {NULL};
-
-/* Log colors */
-#ifdef HG_UTIL_HAS_LOG_COLOR
-static const char *const hg_log_colors_g[] = {"", HG_LOG_RED, HG_LOG_MAGENTA, HG_LOG_BLUE, HG_LOG_BLUE, ""};
-#endif
-
-/* Init */
-#ifndef HG_UTIL_HAS_ATTR_CONSTRUCTOR_PRIORITY
-static bool hg_log_init_g = false;
-#endif
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_init(void)
-{
-    hg_log_init_level();
-    hg_log_init_subsys();
-
-    /* Register top outlet */
-    hg_log_outlet_register(&HG_LOG_OUTLET(hg));
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_finalize(void)
-{
-    hg_log_free_dlogs();
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_init_level(void)
-{
-    const char *log_level = getenv("HG_LOG_LEVEL");
-
-    /* Override default log level */
-    if (log_level == NULL)
-        return;
-
-    hg_log_set_level(hg_log_name_to_level(log_level));
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_init_subsys(void)
-{
-    const char *log_subsys = getenv("HG_LOG_SUBSYS");
-
-    if (log_subsys == NULL)
-        return;
-
-    // fprintf(stderr, "subsys: %s\n", log_subsys);
-    hg_log_set_subsys(log_subsys);
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_outlet_reset_all(void)
-{
-    struct hg_log_outlet *outlet;
-    int                   i;
-
-    /* Reset levels */
-    HG_QUEUE_FOREACH(outlet, &hg_log_outlets_g, entry)
-    outlet->level = HG_LOG_LEVEL_NONE;
-
-    /* Reset subsys */
-    for (i = 0; i < HG_LOG_SUBSYS_MAX; i++)
-        strcpy(hg_log_subsys_g[i], "\0");
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_free_dlogs(void)
-{
-    struct hg_log_outlet *outlet;
-
-    /* Free logs if any was attached */
-    HG_QUEUE_FOREACH(outlet, &hg_log_outlets_g, entry)
-    {
-        if (outlet->debug_log && !(outlet->parent && outlet->parent->debug_log)) {
-            if (outlet->level >= HG_LOG_LEVEL_MIN_DEBUG) {
-                FILE *stream = hg_log_streams_g[outlet->level] ? hg_log_streams_g[outlet->level]
-                                                               : *hg_log_std_streams_g[outlet->level];
-                hg_dlog_dump_counters(outlet->debug_log, hg_log_func_g, stream, 0);
-            }
-            hg_dlog_free(outlet->debug_log);
-        }
-    }
-}
-
-/*---------------------------------------------------------------------------*/
-static int
-hg_log_outlet_active(const char *name)
-{
-    int i = 0;
-
-    while (hg_log_subsys_g[i][0] != '\0' && i < HG_LOG_SUBSYS_MAX) {
-        /* Force a subsystem to be inactive */
-        if ((hg_log_subsys_g[i][0] == '~') && (strcmp(&hg_log_subsys_g[i][1], name) == 0))
-            return -1;
-
-        if (strcmp(hg_log_subsys_g[i], name) == 0) {
-            return 1;
-        }
-        i++;
-    }
-    return 0;
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_outlet_update_level(struct hg_log_outlet *hg_log_outlet)
-{
-    int active = hg_log_outlet_active(hg_log_outlet->name);
-
-    if (active > 0 || hg_log_outlet->state == HG_LOG_ON)
-        hg_log_outlet->level = hg_log_level_g;
-    else if (!(active < 0) && hg_log_outlet->state == HG_LOG_PASS && hg_log_outlet->parent)
-        hg_log_outlet->level = hg_log_outlet->parent->level;
-    else
-        hg_log_outlet->level = HG_LOG_LEVEL_NONE;
-}
-
-/*---------------------------------------------------------------------------*/
-static void
-hg_log_outlet_update_all(void)
-{
-    struct hg_log_outlet *hg_log_outlet;
-
-    HG_QUEUE_FOREACH(hg_log_outlet, &hg_log_outlets_g, entry)
-    hg_log_outlet_update_level(hg_log_outlet);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_level(enum hg_log_level log_level)
-{
-    hg_log_level_g = log_level;
-
-    hg_log_outlet_update_all();
-}
-
-/*---------------------------------------------------------------------------*/
-enum hg_log_level
-hg_log_get_level(void)
-{
-    return hg_log_level_g;
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_subsys(const char *log_subsys)
-{
-    char *subsys, *current, *next;
-    int   i = 0;
-
-    subsys = strdup(log_subsys);
-    if (!subsys)
-        return;
-
-    current = subsys;
-
-    /* Reset all */
-    hg_log_outlet_reset_all();
-
-    /* Enable each of the subsys */
-    while (strtok_r(current, ",", &next) && i < HG_LOG_SUBSYS_MAX) {
-        int j, exist = 0;
-
-        /* Skip duplicates */
-        for (j = 0; j < i; j++) {
-            if (strcmp(current, hg_log_subsys_g[j]) == 0) {
-                exist = 1;
-                break;
-            }
-        }
-
-        if (!exist) {
-            strncpy(hg_log_subsys_g[i], current, HG_LOG_SUBSYS_NAME_MAX);
-            i++;
-        }
-        current = next;
-    }
-
-    /* Update outlets */
-    hg_log_outlet_update_all();
-
-    free(subsys);
-}
-
-/*---------------------------------------------------------------------------*/
-const char *
-hg_log_get_subsys(void)
-{
-    static char log_subsys[HG_LOG_SUBSYS_MAX * (HG_LOG_SUBSYS_NAME_MAX + 2)] = "\0";
-    char       *p                                                            = log_subsys;
-    int         i                                                            = 0;
-
-    while (hg_log_subsys_g[i][0] != '\0' && i < HG_LOG_SUBSYS_MAX) {
-        strcpy(p, hg_log_subsys_g[i]);
-        p += strlen(hg_log_subsys_g[i]);
-        *p = ',';
-        p++;
-        i++;
-    }
-    if (i > 0)
-        *(p - 1) = '\0';
-
-    return (const char *)log_subsys;
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_subsys_level(const char *subsys, enum hg_log_level log_level)
-{
-    const char *log_subsys = hg_log_get_subsys();
-    char       *new_subsys = NULL;
-    const char *new_subsys_ptr;
-
-    if (strcmp(log_subsys, "") != 0) {
-        new_subsys = malloc(strlen(log_subsys) + strlen(subsys) + 2);
-        if (!new_subsys)
-            return;
-        strcpy(new_subsys, log_subsys);
-        strcat(new_subsys, ",");
-        strcat(new_subsys, subsys);
-        new_subsys_ptr = new_subsys;
-    }
-    else
-        new_subsys_ptr = subsys;
-
-    hg_log_set_level(log_level);
-    hg_log_set_subsys(new_subsys_ptr);
-
-    free(new_subsys);
-}
-
-/*---------------------------------------------------------------------------*/
-enum hg_log_level
-hg_log_name_to_level(const char *log_level)
-{
-    enum hg_log_level l = 0;
-
-    if (!log_level || strcasecmp("none", log_level) == 0)
-        return HG_LOG_LEVEL_NONE;
-
-    while (strcasecmp(hg_log_level_name_g[l], log_level) != 0 && l != HG_LOG_LEVEL_MAX)
-        l++;
-
-    if (l == HG_LOG_LEVEL_MAX) {
-        fprintf(stderr, "Warning: invalid log level was passed, defaulting to none\n");
-        return HG_LOG_LEVEL_NONE;
-    }
-
-    return l;
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_func(hg_log_func_t log_func)
-{
-    hg_log_func_g = log_func;
-}
-
-/*---------------------------------------------------------------------------*/
-hg_log_func_t
-hg_log_get_func(void)
-{
-    return hg_log_func_g;
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_stream_debug(FILE *stream)
-{
-    hg_log_streams_g[HG_LOG_LEVEL_DEBUG] = stream;
-}
-
-/*---------------------------------------------------------------------------*/
-FILE *
-hg_log_get_stream_debug(void)
-{
-    return hg_log_streams_g[HG_LOG_LEVEL_DEBUG] ? hg_log_streams_g[HG_LOG_LEVEL_DEBUG]
-                                                : *hg_log_std_streams_g[HG_LOG_LEVEL_DEBUG];
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_stream_warning(FILE *stream)
-{
-    hg_log_streams_g[HG_LOG_LEVEL_WARNING] = stream;
-}
-
-/*---------------------------------------------------------------------------*/
-FILE *
-hg_log_get_stream_warning(void)
-{
-    return hg_log_streams_g[HG_LOG_LEVEL_WARNING] ? hg_log_streams_g[HG_LOG_LEVEL_WARNING]
-                                                  : *hg_log_std_streams_g[HG_LOG_LEVEL_WARNING];
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_set_stream_error(FILE *stream)
-{
-    hg_log_streams_g[HG_LOG_LEVEL_ERROR] = stream;
-}
-
-/*---------------------------------------------------------------------------*/
-FILE *
-hg_log_get_stream_error(void)
-{
-    return hg_log_streams_g[HG_LOG_LEVEL_ERROR] ? hg_log_streams_g[HG_LOG_LEVEL_ERROR]
-                                                : *hg_log_std_streams_g[HG_LOG_LEVEL_ERROR];
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_outlet_register(struct hg_log_outlet *hg_log_outlet)
-{
-#ifndef HG_UTIL_HAS_ATTR_CONSTRUCTOR_PRIORITY
-    if (!hg_log_init_g) {
-        /* Set here to prevent infinite loop */
-        hg_log_init_g = true;
-        hg_log_init();
-    }
-#endif
-
-    hg_log_outlet_update_level(hg_log_outlet);
-
-    /* Inherit debug log if not set and parent has one */
-    if (!hg_log_outlet->debug_log && hg_log_outlet->parent && hg_log_outlet->parent->debug_log)
-        hg_log_outlet->debug_log = hg_log_outlet->parent->debug_log;
-
-    HG_QUEUE_PUSH_TAIL(&hg_log_outlets_g, hg_log_outlet, entry);
-}
-
-/*---------------------------------------------------------------------------*/
-void
-hg_log_write(struct hg_log_outlet *hg_log_outlet, enum hg_log_level log_level, const char *file,
-             unsigned int line, const char *func, const char *format, ...)
-{
-    char        buf[HG_LOG_BUF_MAX];
-    FILE       *stream     = NULL;
-    const char *level_name = NULL;
-#ifdef HG_UTIL_HAS_LOG_COLOR
-    const char *color = hg_log_colors_g[log_level];
-#endif
-    hg_time_t tv;
-    va_list   ap;
-
-    if (!(log_level > HG_LOG_LEVEL_NONE && log_level < HG_LOG_LEVEL_MAX))
-        return;
-
-    hg_time_get_current(&tv);
-    level_name = hg_log_level_name_g[log_level];
-    stream     = hg_log_streams_g[log_level] ? hg_log_streams_g[log_level] : *hg_log_std_streams_g[log_level];
-#ifdef HG_UTIL_HAS_LOG_COLOR
-    color = hg_log_colors_g[log_level];
-#endif
-
-    va_start(ap, format);
-    vsnprintf(buf, HG_LOG_BUF_MAX, format, ap);
-    va_end(ap);
-
-#ifdef HG_UTIL_HAS_LOG_COLOR
-    /* Print using logging function */
-    hg_log_func_g(stream,
-                  "# %s%s[%lf] %s%s%s->%s%s: %s%s[%s]%s%s %s:%d %s\n"
-                  "## %s%s%s()%s: %s%s%s%s\n",
-                  HG_LOG_REG, HG_LOG_GREEN, hg_time_to_double(tv), HG_LOG_REG, HG_LOG_YELLOW, "mercury",
-                  hg_log_outlet->name, HG_LOG_RESET, HG_LOG_BOLD, color, level_name, HG_LOG_REG, color, file,
-                  line, HG_LOG_RESET, HG_LOG_REG, HG_LOG_YELLOW, func, HG_LOG_RESET, HG_LOG_REG,
-                  log_level != HG_LOG_LEVEL_DEBUG ? color : HG_LOG_RESET, buf, HG_LOG_RESET);
-#else
-    /* Print using logging function */
-    hg_log_func_g(stream,
-                  "# [%lf] %s->%s: [%s] %s:%d\n"
-                  " # %s(): %s\n",
-                  hg_time_to_double(tv), "mercury", hg_log_outlet->name, level_name, file, line, func, buf);
-#endif
-
-    if (log_level == HG_LOG_LEVEL_ERROR && hg_log_outlet->debug_log &&
-        hg_log_outlet->level >= HG_LOG_LEVEL_MIN_DEBUG) {
-        hg_dlog_dump(hg_log_outlet->debug_log, hg_log_func_g, stream, 0);
-        hg_dlog_resetlog(hg_log_outlet->debug_log);
-    }
-}
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_log.h b/src/H5FDsubfiling/mercury/src/util/mercury_log.h
deleted file mode 100644
index 8076272..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_log.h
+++ /dev/null
@@ -1,333 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef MERCURY_LOG_H
-#define MERCURY_LOG_H
-
-#include "mercury_util_config.h"
-
-#include "mercury_dlog.h"
-#include "mercury_queue.h"
-
-#include <stdio.h>
-
-/*****************/
-/* Public Macros */
-/*****************/
-
-/* For compatibility */
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ < 199901L)
-#if defined(__GNUC__) && (__GNUC__ >= 2)
-#define __func__ __FUNCTION__
-#else
-#define __func__ "<unknown>"
-#endif
-#elif defined(_WIN32)
-#define __func__ __FUNCTION__
-#endif
-
-/* Cat macro */
-#define HG_UTIL_CAT(x, y) x##y
-
-/* Stringify macro */
-#define HG_UTIL_STRINGIFY(x) #x
-
-/* Constructor (used to initialize log outlets) */
-#define HG_UTIL_CONSTRUCTOR HG_ATTR_CONSTRUCTOR
-
-/* Available log levels, additional log levels should be added to that list by
- * order of verbosity. Format is:
- * - enum type
- * - level name
- * - default output
- *
- * error: print error level logs
- * warning: print warning level logs
- * min_debug: store minimal debug information and defer printing until error
- * debug: print debug level logs
- */
-#define HG_LOG_LEVELS                                                                                        \
-    X(HG_LOG_LEVEL_NONE, "", NULL)                  /*!< no log */                                           \
-    X(HG_LOG_LEVEL_ERROR, "error", &stderr)         /*!< error log type */                                   \
-    X(HG_LOG_LEVEL_WARNING, "warning", &stdout)     /*!< warning log type */                                 \
-    X(HG_LOG_LEVEL_MIN_DEBUG, "min_debug", &stdout) /*!< debug log type */                                   \
-    X(HG_LOG_LEVEL_DEBUG, "debug", &stdout)         /*!< debug log type */                                   \
-    X(HG_LOG_LEVEL_MAX, "", NULL)
-
-/* HG_LOG_OUTLET: global variable name of log outlet. */
-#define HG_LOG_OUTLET(name) HG_UTIL_CAT(name, _log_outlet_g)
-
-/* HG_LOG_OUTLET_DECL: declare an outlet. */
-#define HG_LOG_OUTLET_DECL(name) struct hg_log_outlet HG_LOG_OUTLET(name)
-
-/*
- * HG_LOG_OUTLET_INITIALIZER: initializer for a log in a global variable.
- * (parent and debug_log are optional and can be set to NULL)
- */
-#define HG_LOG_OUTLET_INITIALIZER(name, state, parent, debug_log)                                            \
-    {                                                                                                        \
-        HG_UTIL_STRINGIFY(name), state, HG_LOG_LEVEL_NONE, parent, debug_log,                                \
-        {                                                                                                    \
-            NULL                                                                                             \
-        }                                                                                                    \
-    }
-
-/* HG_LOG_OUTLET_SUBSYS_INITIALIZER: initializer for a sub-system log. */
-#define HG_LOG_OUTLET_SUBSYS_INITIALIZER(name, parent_name)                                                  \
-    HG_LOG_OUTLET_INITIALIZER(name, HG_LOG_PASS, &HG_LOG_OUTLET(parent_name), NULL)
-
-/* HG_LOG_OUTLET_SUBSYS_STATE_INITIALIZER: initializer for a sub-system log with
- * a defined state. */
-#define HG_LOG_OUTLET_SUBSYS_STATE_INITIALIZER(name, parent_name, state)                                     \
-    HG_LOG_OUTLET_INITIALIZER(name, state, &HG_LOG_OUTLET(parent_name), NULL)
-
-/* HG_LOG_SUBSYS_REGISTER: register a name */
-#define HG_LOG_SUBSYS_REGISTER(name)                                                                         \
-    static void HG_UTIL_CAT(hg_log_outlet_, name)(void) HG_UTIL_CONSTRUCTOR;                                 \
-    static void HG_UTIL_CAT(hg_log_outlet_, name)(void)                                                      \
-    {                                                                                                        \
-        hg_log_outlet_register(&HG_LOG_OUTLET(name));                                                        \
-    }                                                                                                        \
-    /* Keep unused prototype to use semicolon at end of macro */                                             \
-    void hg_log_outlet_##name##_unused(void)
-
-/* HG_LOG_SUBSYS_DECL_REGISTER: declare and register a log outlet. */
-#define HG_LOG_SUBSYS_DECL_REGISTER(name, parent_name)                                                       \
-    struct hg_log_outlet HG_LOG_OUTLET(name) = HG_LOG_OUTLET_SUBSYS_INITIALIZER(name, parent_name);          \
-    HG_LOG_SUBSYS_REGISTER(name)
-
-/* HG_LOG_SUBSYS_DECL_STATE_REGISTER: declare and register a log outlet and
- * enforce an init state. */
-#define HG_LOG_SUBSYS_DECL_STATE_REGISTER(name, parent_name, state)                                          \
-    struct hg_log_outlet HG_LOG_OUTLET(name) =                                                               \
-        HG_LOG_OUTLET_SUBSYS_STATE_INITIALIZER(name, parent_name, state);                                    \
-    HG_LOG_SUBSYS_REGISTER(name)
-
-/* Log macro */
-#define HG_LOG_WRITE(name, log_level, ...)                                                                   \
-    do {                                                                                                     \
-        if (log_level == HG_LOG_LEVEL_DEBUG && HG_LOG_OUTLET(name).level >= HG_LOG_LEVEL_MIN_DEBUG &&        \
-            HG_LOG_OUTLET(name).debug_log)                                                                   \
-            hg_dlog_addlog(HG_LOG_OUTLET(name).debug_log, __FILE__, __LINE__, __func__, NULL, NULL);         \
-        if (HG_LOG_OUTLET(name).level >= log_level)                                                          \
-            hg_log_write(&HG_LOG_OUTLET(name), log_level, __FILE__, __LINE__, __func__, __VA_ARGS__);        \
-    } while (0)
-
-#define HG_LOG_WRITE_DEBUG_EXT(name, header, ...)                                                            \
-    do {                                                                                                     \
-        if (HG_LOG_OUTLET(name).level == HG_LOG_LEVEL_DEBUG) {                                               \
-            hg_log_func_t log_func = hg_log_get_func();                                                      \
-            hg_log_write(&HG_LOG_OUTLET(name), HG_LOG_LEVEL_DEBUG, __FILE__, __LINE__, __func__, header);    \
-            log_func(hg_log_get_stream_debug(), __VA_ARGS__);                                                \
-            log_func(hg_log_get_stream_debug(), "---\n");                                                    \
-        }                                                                                                    \
-    } while (0)
-
-/**
- * Additional macros for debug log support.
- */
-
-/* HG_LOG_DEBUG_DLOG: global variable name of debug log. */
-#define HG_LOG_DEBUG_DLOG(name) HG_UTIL_CAT(name, _dlog_g)
-
-/* HG_LOG_DEBUG_LE: global variable name of debug log entries. */
-#define HG_LOG_DEBUG_LE(name) HG_UTIL_CAT(name, _dlog_entries_g)
-
-/* HG_LOG_DEBUG_DECL_DLOG: declare new debug log. */
-#define HG_LOG_DEBUG_DECL_DLOG(name) struct hg_dlog HG_LOG_DEBUG_DLOG(name)
-
-/* HG_LOG_DEBUG_DECL_LE: declare array of debug log entries. */
-#define HG_LOG_DEBUG_DECL_LE(name, size) struct hg_dlog_entry HG_LOG_DEBUG_LE(name)[size]
-
-/* HG_LOG_DLOG_INITIALIZER: initializer for a debug log */
-#define HG_LOG_DLOG_INITIALIZER(name, size)                                                                  \
-    HG_DLOG_INITIALIZER(HG_UTIL_STRINGIFY(name), HG_LOG_DEBUG_LE(name), size, 1)
-
-/* HG_LOG_OUTLET_SUBSYS_DLOG_INITIALIZER: initializer for a sub-system with
- * debug log. */
-#define HG_LOG_OUTLET_SUBSYS_DLOG_INITIALIZER(name, parent_name)                                             \
-    HG_LOG_OUTLET_INITIALIZER(name, HG_LOG_PASS, &HG_LOG_OUTLET(parent_name), &HG_LOG_DEBUG_DLOG(name))
-
-/* HG_LOG_SUBSYS_DLOG_DECL_REGISTER: declare and register a log outlet with
- * debug log. */
-#define HG_LOG_SUBSYS_DLOG_DECL_REGISTER(name, parent_name)                                                  \
-    struct hg_log_outlet HG_LOG_OUTLET(name) = HG_LOG_OUTLET_SUBSYS_DLOG_INITIALIZER(name, parent_name);     \
-    HG_LOG_SUBSYS_REGISTER(name)
-
-/* HG_LOG_ADD_COUNTER32: add 32-bit debug log counter */
-#define HG_LOG_ADD_COUNTER32(name, counter_ptr, counter_name, counter_desc)                                  \
-    hg_dlog_mkcount32(HG_LOG_OUTLET(name).debug_log, counter_ptr, counter_name, counter_desc)
-
-/* HG_LOG_ADD_COUNTER64: add 64-bit debug log counter */
-#define HG_LOG_ADD_COUNTER64(name, counter_ptr, counter_name, counter_desc)                                  \
-    hg_dlog_mkcount64(HG_LOG_OUTLET(name).debug_log, counter_ptr, counter_name, counter_desc)
-
-/*************************************/
-/* Public Type and Struct Definition */
-/*************************************/
-
-#define X(a, b, c) a,
-/* Log levels */
-enum hg_log_level { HG_LOG_LEVELS };
-#undef X
-
-/* Log states */
-enum hg_log_state { HG_LOG_PASS, HG_LOG_OFF, HG_LOG_ON };
-
-/* Log outlet */
-struct hg_log_outlet {
-    const char           *name;          /* Name of outlet */
-    enum hg_log_state     state;         /* Init state of outlet */
-    enum hg_log_level     level;         /* Level of outlet */
-    struct hg_log_outlet *parent;        /* Parent of outlet */
-    struct hg_dlog       *debug_log;     /* Debug log to use */
-    HG_QUEUE_ENTRY(hg_log_outlet) entry; /* List entry */
-};
-
-/* Log function */
-typedef int (*hg_log_func_t)(FILE *stream, const char *format, ...);
-
-/*********************/
-/* Public Prototypes */
-/*********************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * Set the global log level.
- *
- * \param log_level [IN]        enum log level type
- */
-HG_UTIL_PUBLIC void hg_log_set_level(enum hg_log_level log_level);
-
-/**
- * Get the global log level.
- *
- * \return global log_level
- */
-HG_UTIL_PUBLIC enum hg_log_level hg_log_get_level(void);
-
-/**
- * Set the log subsystems from a string. Format is: subsys1,subsys2,...
- * Subsys can also be forced to be disabled with "~", e.g., ~subsys1
- *
- * \param log_level [IN]        null terminated string
- */
-HG_UTIL_PUBLIC void hg_log_set_subsys(const char *log_subsys);
-
-/**
- * Get the log subsystems as a string. Format is similar to hg_log_set_subsys().
- * Buffer returned is static.
- *
- * \return string of enabled log subsystems
- */
-HG_UTIL_PUBLIC const char *hg_log_get_subsys(void);
-
-/**
- * Set a specific subsystem's log level.
- */
-HG_UTIL_PUBLIC void hg_log_set_subsys_level(const char *subsys, enum hg_log_level log_level);
-
-/**
- * Get the log level from a string.
- *
- * \param log_level [IN]        null terminated string
- *
- * \return log type enum value
- */
-HG_UTIL_PUBLIC enum hg_log_level hg_log_name_to_level(const char *log_level);
-
-/**
- * Set the logging function.
- *
- * \param log_func [IN]         pointer to function
- */
-HG_UTIL_PUBLIC void hg_log_set_func(hg_log_func_t log_func);
-
-/**
- * Get the logging function.
- *
- * \return pointer pointer to function
- */
-HG_UTIL_PUBLIC hg_log_func_t hg_log_get_func(void);
-
-/**
- * Set the stream for error output.
- *
- * \param stream [IN/OUT]       pointer to stream
- */
-HG_UTIL_PUBLIC void hg_log_set_stream_error(FILE *stream);
-
-/**
- * Get the stream for error output.
- *
- * \return pointer to stream
- */
-HG_UTIL_PUBLIC FILE *hg_log_get_stream_error(void);
-
-/**
- * Set the stream for warning output.
- *
- * \param stream [IN/OUT]       pointer to stream
- */
-HG_UTIL_PUBLIC void hg_log_set_stream_warning(FILE *stream);
-
-/**
- * Get the stream for warning output.
- *
- * \return pointer to stream
- */
-HG_UTIL_PUBLIC FILE *hg_log_get_stream_warning(void);
-
-/**
- * Set the stream for debug output.
- *
- * \param stream [IN/OUT]       pointer to stream
- */
-HG_UTIL_PUBLIC void hg_log_set_stream_debug(FILE *stream);
-
-/**
- * Get the stream for debug output.
- *
- * \return pointer to stream
- */
-HG_UTIL_PUBLIC FILE *hg_log_get_stream_debug(void);
-
-/**
- * Register log outlet.
- *
- * \param outlet [IN]           log outlet
- */
-HG_UTIL_PUBLIC void hg_log_outlet_register(struct hg_log_outlet *outlet);
-
-/**
- * Write log.
- *
- * \param outlet [IN]           log outlet
- * \param log_level [IN]        log level
- * \param file [IN]             file name
- * \param line [IN]             line number
- * \param func [IN]             function name
- * \param format [IN]           string format
- */
-HG_UTIL_PUBLIC void hg_log_write(struct hg_log_outlet *outlet, enum hg_log_level log_level, const char *file,
-                                 unsigned int line, const char *func, const char *format, ...)
-    HG_UTIL_PRINTF(6, 7);
-
-/*********************/
-/* Public Variables */
-/*********************/
-
-/* Top error outlet */
-extern HG_UTIL_PUBLIC HG_LOG_OUTLET_DECL(hg);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* MERCURY_LOG_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_queue.h b/src/H5FDsubfiling/mercury/src/util/mercury_queue.h
index 6cc65f7..946adec 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_queue.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_queue.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread.c b/src/H5FDsubfiling/mercury/src/util/mercury_thread.c
index 858434f..effae48 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread.c
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread.c
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -150,6 +151,7 @@ hg_thread_setaffinity(hg_thread_t thread, const hg_cpu_set_t *cpu_mask)
 #if defined(_WIN32)
     if (!SetThreadAffinityMask(thread, *cpu_mask))
         return HG_UTIL_FAIL;
+    return HG_UTIL_SUCCESS;
 #elif defined(__APPLE__)
     (void)thread;
     (void)cpu_mask;
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread.h b/src/H5FDsubfiling/mercury/src/util/mercury_thread.h
index d199bc7..f338226 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_annotation.h b/src/H5FDsubfiling/mercury/src/util/mercury_thread_annotation.h
index 50056a1..c11875a 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_annotation.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_annotation.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.c b/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.c
index 9eed4c1..6b70978 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.c
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.c
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -16,7 +17,7 @@ hg_thread_cond_init(hg_thread_cond_t *cond)
     pthread_condattr_t attr;
 
     pthread_condattr_init(&attr);
-#if defined(HG_UTIL_HAS_PTHREAD_CONDATTR_SETCLOCK) && defined(HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE)
+#if defined(H5_HAVE_PTHREAD_CONDATTR_SETCLOCK) && defined(H5_HAVE_CLOCK_MONOTONIC_COARSE)
     /* Must set clock ID if using different clock
      * (CLOCK_MONOTONIC_COARSE not supported here) */
     pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.h b/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.h
index 1435667..dcead57 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_condition.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,9 +13,9 @@
 #ifdef _WIN32
 typedef CONDITION_VARIABLE hg_thread_cond_t;
 #else
-#if defined(HG_UTIL_HAS_PTHREAD_CONDATTR_SETCLOCK) && defined(HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE)
+#if defined(H5_HAVE_PTHREAD_CONDATTR_SETCLOCK) && defined(H5_HAVE_CLOCK_MONOTONIC_COARSE)
 #include <time.h>
-#elif defined(HG_UTIL_HAS_SYSTIME_H)
+#elif defined(H5_HAVE_SYS_TIME_H)
 #include <sys/time.h>
 #endif
 #include <stdlib.h>
@@ -134,7 +135,7 @@ hg_thread_cond_timedwait(hg_thread_cond_t *cond, hg_thread_mutex_t *mutex, unsig
     if (!SleepConditionVariableCS(cond, mutex, timeout))
         return HG_UTIL_FAIL;
 #else
-#if defined(HG_UTIL_HAS_PTHREAD_CONDATTR_SETCLOCK) && defined(HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE)
+#if defined(H5_HAVE_PTHREAD_CONDATTR_SETCLOCK) && defined(H5_HAVE_CLOCK_MONOTONIC_COARSE)
     struct timespec now;
 #else
     struct timeval now;
@@ -143,13 +144,13 @@ hg_thread_cond_timedwait(hg_thread_cond_t *cond, hg_thread_mutex_t *mutex, unsig
     ldiv_t          ld;
 
     /* Need to convert timeout (ms) to absolute time */
-#if defined(HG_UTIL_HAS_PTHREAD_CONDATTR_SETCLOCK) && defined(HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE)
+#if defined(H5_HAVE_PTHREAD_CONDATTR_SETCLOCK) && defined(H5_HAVE_CLOCK_MONOTONIC_COARSE)
     clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
 
     /* Get sec / nsec */
     ld                  = ldiv(now.tv_nsec + timeout * 1000000L, 1000000000L);
     abs_timeout.tv_nsec = ld.rem;
-#elif defined(HG_UTIL_HAS_SYSTIME_H)
+#elif defined(H5_HAVE_SYS_TIME_H)
     gettimeofday(&now, NULL);
 
     /* Get sec / usec */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.c b/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.c
index c60ca94..8fc804f 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.c
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.c
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -32,7 +33,6 @@ hg_thread_mutex_init_posix(hg_thread_mutex_t *mutex, int kind)
 
 done:
     rc = pthread_mutexattr_destroy(&mutex_attr);
-    HG_UTIL_CHECK_ERROR_DONE(rc != 0, "pthread_mutexattr_destroy() failed (%s)", strerror(rc));
 
     return ret;
 }
@@ -61,7 +61,7 @@ hg_thread_mutex_init_fast(hg_thread_mutex_t *mutex)
 
 #if defined(_WIN32)
     ret = hg_thread_mutex_init(mutex);
-#elif defined(HG_UTIL_HAS_PTHREAD_MUTEX_ADAPTIVE_NP)
+#elif defined(H5_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP)
     /* Set type to PTHREAD_MUTEX_ADAPTIVE_NP to improve performance */
     ret = hg_thread_mutex_init_posix(mutex, PTHREAD_MUTEX_ADAPTIVE_NP);
 #else
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.h b/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.h
index 61d74a3..73ceafb 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_mutex.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -14,7 +15,9 @@
 #ifdef _WIN32
 #define _WINSOCKAPI_
 #include <windows.h>
-#define HG_THREAD_MUTEX_INITIALIZER NULL
+/* clang-format off */
+#    define HG_THREAD_MUTEX_INITIALIZER {NULL}
+/* clang-format on */
 typedef CRITICAL_SECTION hg_thread_mutex_t;
 #else
 #include <pthread.h>
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.c b/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.c
index cbb7563..704e84f 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.c
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.c
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.h b/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.h
index e3b9f4d..6744eac 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_thread_pool.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_time.h b/src/H5FDsubfiling/mercury/src/util/mercury_time.h
deleted file mode 100644
index ba82a8a..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_time.h
+++ /dev/null
@@ -1,500 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef MERCURY_TIME_H
-#define MERCURY_TIME_H
-
-#include "mercury_util_config.h"
-
-#if defined(_WIN32)
-#define _WINSOCKAPI_
-#include <windows.h>
-#elif defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-#include <time.h>
-#elif defined(__APPLE__) && defined(HG_UTIL_HAS_SYSTIME_H)
-#include <mach/mach_time.h>
-#include <sys/time.h>
-#else
-#include <stdio.h>
-#include <unistd.h>
-#if defined(HG_UTIL_HAS_SYSTIME_H)
-#include <sys/time.h>
-#else
-#error "Not supported on this platform."
-#endif
-#endif
-
-/*************************************/
-/* Public Type and Struct Definition */
-/*************************************/
-
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-typedef struct timespec hg_time_t;
-#else
-typedef struct hg_time hg_time_t;
-
-struct hg_time {
-    long tv_sec;
-    long tv_usec;
-};
-#endif
-
-/*****************/
-/* Public Macros */
-/*****************/
-
-/*********************/
-/* Public Prototypes */
-/*********************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * Get an elapsed time on the calling processor.
- *
- * \param tv [OUT]              pointer to returned time structure
- *
- * \return Non-negative on success or negative on failure
- */
-static HG_UTIL_INLINE int hg_time_get_current(hg_time_t *tv);
-
-/**
- * Get an elapsed time on the calling processor (resolution is ms).
- *
- * \param tv [OUT]              pointer to returned time structure
- *
- * \return Non-negative on success or negative on failure
- */
-static HG_UTIL_INLINE int hg_time_get_current_ms(hg_time_t *tv);
-
-/**
- * Convert hg_time_t to double.
- *
- * \param tv [IN]               time structure
- *
- * \return Converted time in seconds
- */
-static HG_UTIL_INLINE double hg_time_to_double(hg_time_t tv);
-
-/**
- * Convert double to hg_time_t.
- *
- * \param d [IN]                time in seconds
- *
- * \return Converted time structure
- */
-static HG_UTIL_INLINE hg_time_t hg_time_from_double(double d);
-
-/**
- * Convert (integer) milliseconds to hg_time_t.
- *
- * \param ms [IN]                time in milliseconds
- *
- * \return Converted time structure
- */
-static HG_UTIL_INLINE hg_time_t hg_time_from_ms(unsigned int ms);
-
-/**
- * Convert hg_time_t to (integer) milliseconds.
- *
- * \param tv [IN]                time structure
- *
- * \return Time in milliseconds
- */
-static HG_UTIL_INLINE unsigned int hg_time_to_ms(hg_time_t tv);
-
-/**
- * Compare time values.
- *
- * \param in1 [IN]              time structure
- * \param in2 [IN]              time structure
- *
- * \return 1 if in1 < in2, 0 otherwise
- */
-static HG_UTIL_INLINE int hg_time_less(hg_time_t in1, hg_time_t in2);
-
-/**
- * Diff time values and return the number of seconds elapsed between
- * time \in2 and time \in1.
- *
- * \param in2 [IN]              time structure
- * \param in1 [IN]              time structure
- *
- * \return Subtracted time
- */
-static HG_UTIL_INLINE double hg_time_diff(hg_time_t in2, hg_time_t in1);
-
-/**
- * Add time values.
- *
- * \param in1 [IN]              time structure
- * \param in2 [IN]              time structure
- *
- * \return Summed time structure
- */
-static HG_UTIL_INLINE hg_time_t hg_time_add(hg_time_t in1, hg_time_t in2);
-
-/**
- * Subtract time values.
- *
- * \param in1 [IN]              time structure
- * \param in2 [IN]              time structure
- *
- * \return Subtracted time structure
- */
-static HG_UTIL_INLINE hg_time_t hg_time_subtract(hg_time_t in1, hg_time_t in2);
-
-/**
- * Sleep until the time specified in rqt has elapsed.
- *
- * \param reqt [IN]             time structure
- *
- * \return Non-negative on success or negative on failure
- */
-static HG_UTIL_INLINE int hg_time_sleep(const hg_time_t rqt);
-
-/**
- * Get a string containing current time/date stamp.
- *
- * \return Valid string or NULL on failure
- */
-static HG_UTIL_INLINE char *hg_time_stamp(void);
-
-/*---------------------------------------------------------------------------*/
-#ifdef _WIN32
-static HG_UTIL_INLINE LARGE_INTEGER
-get_FILETIME_offset(void)
-{
-    SYSTEMTIME    s;
-    FILETIME      f;
-    LARGE_INTEGER t;
-
-    s.wYear         = 1970;
-    s.wMonth        = 1;
-    s.wDay          = 1;
-    s.wHour         = 0;
-    s.wMinute       = 0;
-    s.wSecond       = 0;
-    s.wMilliseconds = 0;
-    SystemTimeToFileTime(&s, &f);
-    t.QuadPart = f.dwHighDateTime;
-    t.QuadPart <<= 32;
-    t.QuadPart |= f.dwLowDateTime;
-
-    return t;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_get_current(hg_time_t *tv)
-{
-    LARGE_INTEGER        t;
-    FILETIME             f;
-    double               t_usec;
-    static LARGE_INTEGER offset;
-    static double        freq_to_usec;
-    static int           initialized      = 0;
-    static BOOL          use_perf_counter = 0;
-
-    if (!initialized) {
-        LARGE_INTEGER perf_freq;
-        initialized      = 1;
-        use_perf_counter = QueryPerformanceFrequency(&perf_freq);
-        if (use_perf_counter) {
-            QueryPerformanceCounter(&offset);
-            freq_to_usec = (double)perf_freq.QuadPart / 1000000.;
-        }
-        else {
-            offset       = get_FILETIME_offset();
-            freq_to_usec = 10.;
-        }
-    }
-    if (use_perf_counter) {
-        QueryPerformanceCounter(&t);
-    }
-    else {
-        GetSystemTimeAsFileTime(&f);
-        t.QuadPart = f.dwHighDateTime;
-        t.QuadPart <<= 32;
-        t.QuadPart |= f.dwLowDateTime;
-    }
-
-    t.QuadPart -= offset.QuadPart;
-    t_usec      = (double)t.QuadPart / freq_to_usec;
-    t.QuadPart  = (LONGLONG)t_usec;
-    tv->tv_sec  = (long)(t.QuadPart / 1000000);
-    tv->tv_usec = (long)(t.QuadPart % 1000000);
-
-    return HG_UTIL_SUCCESS;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_get_current_ms(hg_time_t *tv)
-{
-    return hg_time_get_current(tv);
-}
-
-/*---------------------------------------------------------------------------*/
-#elif defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-static HG_UTIL_INLINE int
-hg_time_get_current(hg_time_t *tv)
-{
-    clock_gettime(CLOCK_MONOTONIC, tv);
-
-    return HG_UTIL_SUCCESS;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_get_current_ms(hg_time_t *tv)
-{
-/* ppc/32 and ppc/64 do not support CLOCK_MONOTONIC_COARSE in vdso */
-#if defined(__ppc64__) || defined(__ppc__) || defined(__PPC64__) || defined(__PPC__) ||                      \
-    !defined(HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE)
-    clock_gettime(CLOCK_MONOTONIC, tv);
-#else
-    /* We don't need fine grain time stamps, _COARSE resolution is 1ms */
-    clock_gettime(CLOCK_MONOTONIC_COARSE, tv);
-#endif
-    return HG_UTIL_SUCCESS;
-}
-
-/*---------------------------------------------------------------------------*/
-#elif defined(__APPLE__) && defined(HG_UTIL_HAS_SYSTIME_H)
-static HG_UTIL_INLINE int
-hg_time_get_current(hg_time_t *tv)
-{
-    static uint64_t monotonic_timebase_factor = 0;
-    uint64_t        monotonic_nsec;
-
-    if (monotonic_timebase_factor == 0) {
-        mach_timebase_info_data_t timebase_info;
-
-        (void)mach_timebase_info(&timebase_info);
-        monotonic_timebase_factor = timebase_info.numer / timebase_info.denom;
-    }
-    monotonic_nsec = (mach_absolute_time() * monotonic_timebase_factor);
-    tv->tv_sec     = (long)(monotonic_nsec / 1000000000);
-    tv->tv_usec    = (long)((monotonic_nsec - (uint64_t)tv->tv_sec) / 1000);
-
-    return HG_UTIL_SUCCESS;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_get_current_ms(hg_time_t *tv)
-{
-    return hg_time_get_current(tv);
-}
-
-#else
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_get_current(hg_time_t *tv)
-{
-    gettimeofday((struct timeval *)tv, NULL);
-
-    return HG_UTIL_SUCCESS;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_get_current_ms(hg_time_t *tv)
-{
-    return hg_time_get_current(tv);
-}
-
-#endif
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE double
-hg_time_to_double(hg_time_t tv)
-{
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    return (double)tv.tv_sec + (double)(tv.tv_nsec) * 0.000000001;
-#else
-    return (double)tv.tv_sec + (double)(tv.tv_usec) * 0.000001;
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE hg_time_t
-hg_time_from_double(double d)
-{
-    hg_time_t tv;
-
-    tv.tv_sec = (long)d;
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    tv.tv_nsec = (long)((d - (double)(tv.tv_sec)) * 1000000000);
-#else
-    tv.tv_usec = (long)((d - (double)(tv.tv_sec)) * 1000000);
-#endif
-
-    return tv;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE unsigned int
-hg_time_to_ms(hg_time_t tv)
-{
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    return (unsigned int)(tv.tv_sec * 1000 + ((tv.tv_nsec + 999999) / 1000000));
-#else
-    return (unsigned int)(tv.tv_sec * 1000 + ((tv.tv_usec + 999) / 1000));
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE hg_time_t
-hg_time_from_ms(unsigned int ms)
-{
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    return (hg_time_t){.tv_sec = ms / 1000, .tv_nsec = (ms - (ms / 1000) * 1000) * 1000000};
-#else
-    return (hg_time_t){.tv_sec = ms / 1000, .tv_usec = (ms - (ms / 1000) * 1000) * 1000};
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_less(hg_time_t in1, hg_time_t in2)
-{
-    return ((in1.tv_sec < in2.tv_sec) || ((in1.tv_sec == in2.tv_sec) &&
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-                                          (in1.tv_nsec < in2.tv_nsec)));
-#else
-                                          (in1.tv_usec < in2.tv_usec)));
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE double
-hg_time_diff(hg_time_t in2, hg_time_t in1)
-{
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    return ((double)in2.tv_sec + (double)(in2.tv_nsec) * 0.000000001) -
-           ((double)in1.tv_sec + (double)(in1.tv_nsec) * 0.000000001);
-#else
-    return ((double)in2.tv_sec + (double)(in2.tv_usec) * 0.000001) -
-           ((double)in1.tv_sec + (double)(in1.tv_usec) * 0.000001);
-#endif
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE hg_time_t
-hg_time_add(hg_time_t in1, hg_time_t in2)
-{
-    hg_time_t out;
-
-    out.tv_sec = in1.tv_sec + in2.tv_sec;
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    out.tv_nsec = in1.tv_nsec + in2.tv_nsec;
-    if (out.tv_nsec > 1000000000) {
-        out.tv_nsec -= 1000000000;
-        out.tv_sec += 1;
-    }
-#else
-    out.tv_usec = in1.tv_usec + in2.tv_usec;
-    if (out.tv_usec > 1000000) {
-        out.tv_usec -= 1000000;
-        out.tv_sec += 1;
-    }
-#endif
-
-    return out;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE hg_time_t
-hg_time_subtract(hg_time_t in1, hg_time_t in2)
-{
-    hg_time_t out;
-
-    out.tv_sec = in1.tv_sec - in2.tv_sec;
-#if defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    out.tv_nsec = in1.tv_nsec - in2.tv_nsec;
-    if (out.tv_nsec < 0) {
-        out.tv_nsec += 1000000000;
-        out.tv_sec -= 1;
-    }
-#else
-    out.tv_usec = in1.tv_usec - in2.tv_usec;
-    if (out.tv_usec < 0) {
-        out.tv_usec += 1000000;
-        out.tv_sec -= 1;
-    }
-#endif
-
-    return out;
-}
-
-/*---------------------------------------------------------------------------*/
-static HG_UTIL_INLINE int
-hg_time_sleep(const hg_time_t rqt)
-{
-#ifdef _WIN32
-    DWORD dwMilliseconds = (DWORD)(hg_time_to_double(rqt) / 1000);
-
-    Sleep(dwMilliseconds);
-#elif defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    if (nanosleep(&rqt, NULL))
-        return HG_UTIL_FAIL;
-#else
-    useconds_t usec = (useconds_t)rqt.tv_sec * 1000000 + (useconds_t)rqt.tv_usec;
-
-    if (usleep(usec))
-        return HG_UTIL_FAIL;
-#endif
-
-    return HG_UTIL_SUCCESS;
-}
-
-/*---------------------------------------------------------------------------*/
-#define HG_UTIL_STAMP_MAX 128
-static HG_UTIL_INLINE char *
-hg_time_stamp(void)
-{
-    static char buf[HG_UTIL_STAMP_MAX] = {'\0'};
-
-#if defined(_WIN32)
-    /* TODO not implemented */
-#elif defined(HG_UTIL_HAS_TIME_H) && defined(HG_UTIL_HAS_CLOCK_GETTIME)
-    struct tm *local_time;
-    time_t     t;
-
-    t          = time(NULL);
-    local_time = localtime(&t);
-    if (local_time == NULL)
-        return NULL;
-
-    if (strftime(buf, HG_UTIL_STAMP_MAX, "%a, %d %b %Y %T %Z", local_time) == 0)
-        return NULL;
-#else
-    struct timeval  tv;
-    struct timezone tz;
-    unsigned long   days, hours, minutes, seconds;
-
-    gettimeofday(&tv, &tz);
-    days    = (unsigned long)tv.tv_sec / (3600 * 24);
-    hours   = ((unsigned long)tv.tv_sec - days * 24 * 3600) / 3600;
-    minutes = ((unsigned long)tv.tv_sec - days * 24 * 3600 - hours * 3600) / 60;
-    seconds = (unsigned long)tv.tv_sec - days * 24 * 3600 - hours * 3600 - minutes * 60;
-    hours -= (unsigned long)tz.tz_minuteswest / 60;
-
-    snprintf(buf, HG_UTIL_STAMP_MAX, "%02lu:%02lu:%02lu (GMT-%d)", hours, minutes, seconds,
-             tz.tz_minuteswest / 60);
-#endif
-
-    return buf;
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* MERCURY_TIME_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_util.c b/src/H5FDsubfiling/mercury/src/util/mercury_util.c
deleted file mode 100644
index b9c1101..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_util.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include "mercury_util.h"
-
-#include "mercury_util_error.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-/****************/
-/* Local Macros */
-/****************/
-
-/* Name of this subsystem */
-#define HG_UTIL_SUBSYS_NAME        hg_util
-#define HG_UTIL_STRINGIFY1(x)      HG_UTIL_STRINGIFY(x)
-#define HG_UTIL_SUBSYS_NAME_STRING HG_UTIL_STRINGIFY1(HG_UTIL_SUBSYS_NAME)
-
-/*******************/
-/* Local Variables */
-/*******************/
-
-/* Default error log mask */
-HG_LOG_SUBSYS_DECL_REGISTER(HG_UTIL_SUBSYS_NAME, hg);
-
-/*---------------------------------------------------------------------------*/
-void
-HG_Util_version_get(unsigned int *major, unsigned int *minor, unsigned int *patch)
-{
-    if (major)
-        *major = HG_UTIL_VERSION_MAJOR;
-    if (minor)
-        *minor = HG_UTIL_VERSION_MINOR;
-    if (patch)
-        *patch = HG_UTIL_VERSION_PATCH;
-}
-
-/*---------------------------------------------------------------------------*/
-void
-HG_Util_set_log_level(const char *level)
-{
-    hg_log_set_subsys_level(HG_UTIL_SUBSYS_NAME_STRING, hg_log_name_to_level(level));
-}
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_util.h b/src/H5FDsubfiling/mercury/src/util/mercury_util.h
deleted file mode 100644
index aad9a11..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_util.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef MERCURY_UTIL_LOG_H
-#define MERCURY_UTIL_LOG_H
-
-#include "mercury_util_config.h"
-
-/*************************************/
-/* Public Type and Struct Definition */
-/*************************************/
-
-/*****************/
-/* Public Macros */
-/*****************/
-
-/*********************/
-/* Public Prototypes */
-/*********************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * Get HG util version number.
- *
- * \param major [OUT]           pointer to unsigned integer
- * \param minor [OUT]           pointer to unsigned integer
- * \param patch [OUT]           pointer to unsigned integer
- */
-HG_UTIL_PUBLIC void HG_Util_version_get(unsigned int *major, unsigned int *minor, unsigned int *patch);
-
-/**
- * Set the log level for HG util. That setting is valid for all HG classes.
- *
- * \param level [IN]            level string, valid values are:
- *                                "none", "error", "warning", "debug"
- */
-HG_UTIL_PUBLIC void HG_Util_set_log_level(const char *level);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* MERCURY_UTIL_LOG_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h b/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h
index 41972df..53189fb 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h
@@ -1,11 +1,10 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-/* Generated file. Only edit mercury_util_config.h.in. */
-
 #ifndef MERCURY_UTIL_CONFIG_H
 #define MERCURY_UTIL_CONFIG_H
 
@@ -13,17 +12,19 @@
 /* Public Type and Struct Definition */
 /*************************************/
 
+#include "H5private.h"
+
 /* Type definitions */
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
-#include <stdbool.h>
 
 /*****************/
 /* Public Macros */
 /*****************/
 
 /* Reflects any major or incompatible public API changes */
-#define HG_UTIL_VERSION_MAJOR 3
+#define HG_UTIL_VERSION_MAJOR 4
 /* Reflects any minor backwards compatible API or functionality addition */
 #define HG_UTIL_VERSION_MINOR 0
 /* Reflects any backwards compatible bug fixes */
@@ -42,75 +43,8 @@
 #define HG_UTIL_INLINE __inline__
 #endif
 
-/* Alignment */
-#define HG_UTIL_ALIGNED(x, a) HG_ATTR_ALIGNED(x, a)
-
-/* Check format arguments */
-#define HG_UTIL_PRINTF(_fmt, _firstarg) HG_ATTR_PRINTF(_fmt, _firstarg)
-
-/* Shared libraries */
-/* #undef HG_UTIL_BUILD_SHARED_LIBS */
-#ifdef HG_UTIL_BUILD_SHARED_LIBS
-#ifdef mercury_util_EXPORTS
-#define HG_UTIL_PUBLIC HG_ATTR_ABI_EXPORT
-#else
-#define HG_UTIL_PUBLIC HG_ATTR_ABI_IMPORT
-#endif
-#define HG_UTIL_PRIVATE HG_ATTR_ABI_HIDDEN
-#else
 #define HG_UTIL_PUBLIC
 #define HG_UTIL_PRIVATE
-#endif
-
-/* Define if has __attribute__((constructor(priority))) */
-#define HG_UTIL_HAS_ATTR_CONSTRUCTOR_PRIORITY
-
-/* Define if has 'clock_gettime()' */
-#define HG_UTIL_HAS_CLOCK_GETTIME
-
-/* Define if has CLOCK_MONOTONIC_COARSE */
-#define HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE
-
-/* Define is has debug */
-/* #undef HG_UTIL_HAS_DEBUG */
-
-/* Define if has eventfd_t type */
-#define HG_UTIL_HAS_EVENTFD_T
-
-/* Define if has colored output */
-/* #undef HG_UTIL_HAS_LOG_COLOR */
-
-/* Define if has 'pthread_condattr_setclock()' */
-#define HG_UTIL_HAS_PTHREAD_CONDATTR_SETCLOCK
-
-/* Define if has PTHREAD_MUTEX_ADAPTIVE_NP */
-#define HG_UTIL_HAS_PTHREAD_MUTEX_ADAPTIVE_NP
-
-/* Define if has pthread_spinlock_t type */
-#define HG_UTIL_HAS_PTHREAD_SPINLOCK_T
-
-/* Define if has <stdatomic.h> */
-#define HG_UTIL_HAS_STDATOMIC_H
-
-/* Define type size of atomic_long */
-#define HG_UTIL_ATOMIC_LONG_WIDTH 8
-
-/* Define if has <sys/epoll.h> */
-#define HG_UTIL_HAS_SYSEPOLL_H
-
-/* Define if has <sys/event.h> */
-/* #undef HG_UTIL_HAS_SYSEVENT_H */
-
-/* Define if has <sys/eventfd.h> */
-#define HG_UTIL_HAS_SYSEVENTFD_H
-
-/* Define if has <sys/param.h> */
-#define HG_UTIL_HAS_SYSPARAM_H
-
-/* Define if has <sys/time.h> */
-#define HG_UTIL_HAS_SYSTIME_H
-
-/* Define if has <time.h> */
-#define HG_UTIL_HAS_TIME_H
+#define HG_UTIL_PLUGIN
 
 #endif /* MERCURY_UTIL_CONFIG_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h.in b/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h.in
deleted file mode 100644
index d20e0e6..0000000
--- a/src/H5FDsubfiling/mercury/src/util/mercury_util_config.h.in
+++ /dev/null
@@ -1,116 +0,0 @@
-/**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-/* Generated file. Only edit mercury_util_config.h.in. */
-
-#ifndef MERCURY_UTIL_CONFIG_H
-#define MERCURY_UTIL_CONFIG_H
-
-/*************************************/
-/* Public Type and Struct Definition */
-/*************************************/
-
-/* Type definitions */
-#include <stddef.h>
-#include <stdint.h>
-#include <stdbool.h>
-
-/*****************/
-/* Public Macros */
-/*****************/
-
-/* Reflects any major or incompatible public API changes */
-#define HG_UTIL_VERSION_MAJOR @MERCURY_UTIL_VERSION_MAJOR@
-/* Reflects any minor backwards compatible API or functionality addition */
-#define HG_UTIL_VERSION_MINOR @MERCURY_UTIL_VERSION_MINOR@
-/* Reflects any backwards compatible bug fixes */
-#define HG_UTIL_VERSION_PATCH @MERCURY_UTIL_VERSION_PATCH@
-
-/* Return codes */
-#define HG_UTIL_SUCCESS 0
-#define HG_UTIL_FAIL    -1
-
-#include <mercury_compiler_attributes.h>
-
-/* Inline macro */
-#ifdef _WIN32
-#    define HG_UTIL_INLINE __inline
-#else
-#    define HG_UTIL_INLINE __inline__
-#endif
-
-/* Alignment */
-#define HG_UTIL_ALIGNED(x, a) HG_ATTR_ALIGNED(x, a)
-
-/* Check format arguments */
-#define HG_UTIL_PRINTF(_fmt, _firstarg) HG_ATTR_PRINTF(_fmt, _firstarg)
-
-/* Shared libraries */
-#cmakedefine HG_UTIL_BUILD_SHARED_LIBS
-#ifdef HG_UTIL_BUILD_SHARED_LIBS
-#    ifdef mercury_util_EXPORTS
-#        define HG_UTIL_PUBLIC HG_ATTR_ABI_EXPORT
-#    else
-#        define HG_UTIL_PUBLIC HG_ATTR_ABI_IMPORT
-#    endif
-#    define HG_UTIL_PRIVATE HG_ATTR_ABI_HIDDEN
-#else
-#    define HG_UTIL_PUBLIC
-#    define HG_UTIL_PRIVATE
-#endif
-
-/* Define if has __attribute__((constructor(priority))) */
-#cmakedefine HG_UTIL_HAS_ATTR_CONSTRUCTOR_PRIORITY
-
-/* Define if has 'clock_gettime()' */
-#cmakedefine HG_UTIL_HAS_CLOCK_GETTIME
-
-/* Define if has CLOCK_MONOTONIC_COARSE */
-#cmakedefine HG_UTIL_HAS_CLOCK_MONOTONIC_COARSE
-
-/* Define is has debug */
-#cmakedefine HG_UTIL_HAS_DEBUG
-
-/* Define if has eventfd_t type */
-#cmakedefine HG_UTIL_HAS_EVENTFD_T
-
-/* Define if has colored output */
-#cmakedefine HG_UTIL_HAS_LOG_COLOR
-
-/* Define if has 'pthread_condattr_setclock()' */
-#cmakedefine HG_UTIL_HAS_PTHREAD_CONDATTR_SETCLOCK
-
-/* Define if has PTHREAD_MUTEX_ADAPTIVE_NP */
-#cmakedefine HG_UTIL_HAS_PTHREAD_MUTEX_ADAPTIVE_NP
-
-/* Define if has pthread_spinlock_t type */
-#cmakedefine HG_UTIL_HAS_PTHREAD_SPINLOCK_T
-
-/* Define if has <stdatomic.h> */
-#cmakedefine HG_UTIL_HAS_STDATOMIC_H
-
-/* Define type size of atomic_long */
-#cmakedefine HG_UTIL_ATOMIC_LONG_WIDTH @HG_UTIL_ATOMIC_LONG_WIDTH@
-
-/* Define if has <sys/epoll.h> */
-#cmakedefine HG_UTIL_HAS_SYSEPOLL_H
-
-/* Define if has <sys/event.h> */
-#cmakedefine HG_UTIL_HAS_SYSEVENT_H
-
-/* Define if has <sys/eventfd.h> */
-#cmakedefine HG_UTIL_HAS_SYSEVENTFD_H
-
-/* Define if has <sys/param.h> */
-#cmakedefine HG_UTIL_HAS_SYSPARAM_H
-
-/* Define if has <sys/time.h> */
-#cmakedefine HG_UTIL_HAS_SYSTIME_H
-
-/* Define if has <time.h> */
-#cmakedefine HG_UTIL_HAS_TIME_H
-
-#endif /* MERCURY_UTIL_CONFIG_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/mercury_util_error.h b/src/H5FDsubfiling/mercury/src/util/mercury_util_error.h
index 9004c5a..b5cb5cc 100644
--- a/src/H5FDsubfiling/mercury/src/util/mercury_util_error.h
+++ b/src/H5FDsubfiling/mercury/src/util/mercury_util_error.h
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2013-2022 UChicago Argonne, LLC and The HDF Group.
+ * Copyright (c) 2022-2023 Intel Corporation.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -9,17 +10,6 @@
 
 #include "mercury_util_config.h"
 
-/* Default error macro */
-#include <mercury_log.h>
-extern HG_UTIL_PRIVATE HG_LOG_OUTLET_DECL(hg_util);
-#define HG_UTIL_LOG_ERROR(...)   HG_LOG_WRITE(hg_util, HG_LOG_LEVEL_ERROR, __VA_ARGS__)
-#define HG_UTIL_LOG_WARNING(...) HG_LOG_WRITE(hg_util, HG_LOG_LEVEL_WARNING, __VA_ARGS__)
-#ifdef HG_UTIL_HAS_DEBUG
-#define HG_UTIL_LOG_DEBUG(...) HG_LOG_WRITE(hg_util, HG_LOG_LEVEL_DEBUG, __VA_ARGS__)
-#else
-#define HG_UTIL_LOG_DEBUG(...) (void)0
-#endif
-
 /* Branch predictor hints */
 #ifndef _WIN32
 #define likely(x)   __builtin_expect(!!(x), 1)
@@ -38,7 +28,6 @@ extern HG_UTIL_PRIVATE HG_LOG_OUTLET_DECL(hg_util);
 
 #define HG_UTIL_GOTO_ERROR(label, ret, err_val, ...)                                                         \
     do {                                                                                                     \
-        HG_UTIL_LOG_ERROR(__VA_ARGS__);                                                                      \
         ret = err_val;                                                                                       \
         goto label;                                                                                          \
     } while (0)
@@ -47,7 +36,6 @@ extern HG_UTIL_PRIVATE HG_LOG_OUTLET_DECL(hg_util);
 #define HG_UTIL_CHECK_ERROR(cond, label, ret, err_val, ...)                                                  \
     do {                                                                                                     \
         if (unlikely(cond)) {                                                                                \
-            HG_UTIL_LOG_ERROR(__VA_ARGS__);                                                                  \
             ret = err_val;                                                                                   \
             goto label;                                                                                      \
         }                                                                                                    \
@@ -56,24 +44,8 @@ extern HG_UTIL_PRIVATE HG_LOG_OUTLET_DECL(hg_util);
 #define HG_UTIL_CHECK_ERROR_NORET(cond, label, ...)                                                          \
     do {                                                                                                     \
         if (unlikely(cond)) {                                                                                \
-            HG_UTIL_LOG_ERROR(__VA_ARGS__);                                                                  \
             goto label;                                                                                      \
         }                                                                                                    \
     } while (0)
 
-#define HG_UTIL_CHECK_ERROR_DONE(cond, ...)                                                                  \
-    do {                                                                                                     \
-        if (unlikely(cond)) {                                                                                \
-            HG_UTIL_LOG_ERROR(__VA_ARGS__);                                                                  \
-        }                                                                                                    \
-    } while (0)
-
-/* Check for cond and print warning */
-#define HG_UTIL_CHECK_WARNING(cond, ...)                                                                     \
-    do {                                                                                                     \
-        if (unlikely(cond)) {                                                                                \
-            HG_UTIL_LOG_WARNING(__VA_ARGS__);                                                                \
-        }                                                                                                    \
-    } while (0)
-
 #endif /* MERCURY_UTIL_ERROR_H */
diff --git a/src/H5FDsubfiling/mercury/src/util/version.txt b/src/H5FDsubfiling/mercury/src/util/version.txt
deleted file mode 100644
index 4a36342..0000000
--- a/src/H5FDsubfiling/mercury/src/util/version.txt
+++ /dev/null
@@ -1 +0,0 @@
-3.0.0
diff --git a/src/H5FDsubfiling/mercury/version.txt b/src/H5FDsubfiling/mercury/version.txt
deleted file mode 100644
index 676a2fb..0000000
--- a/src/H5FDsubfiling/mercury/version.txt
+++ /dev/null
@@ -1 +0,0 @@
-2.2.0rc6