OpenMP 5.2

New features listed in Appendix B of the OpenMP specification

Description	Status	Comments
omp_in_explicit_task routine and explicit-task-var ICV	Y
omp / ompx / omx sentinels and omp_ / ompx_ namespaces	N/A	warning for ompx/omx sentinels [1]
Clauses on end directive can be on directive	N
Deprecation of no-argument destroy clause on depobj	N
linear clause syntax changes and step modifier	Y
Deprecation of minus operator for reductions	N
Deprecation of separating map modifiers without comma	N
declare mapper with iterator and present modifiers	N
If a matching mapped list item is not found in the data environment, the pointer retains its original value	N
New enter clause as alias for to on declare target directive	Y
Deprecation of to clause on declare target directive	N
Extended list of directives permitted in Fortran pure procedures	N
New allocators directive for Fortran	N
Deprecation of allocate directive for Fortran allocatables/pointers	N
Optional paired end directive with dispatch	N
New memspace and traits modifiers for uses_allocators	N
Deprecation of traits array following the allocator_handle expression in uses_allocators	N
New otherwise clause as alias for default on metadirectives	N
Deprecation of default clause on metadirectives	N
Deprecation of delimited form of declare target	N
Reproducible semantics changed for order(concurrent)	N
allocate and firstprivate clauses on scope	Y
ompt_callback_work	N
Default map-type for map clause in target enter/exit data	Y
New doacross clause as alias for depend with source / sink modifier	Y
Deprecation of depend with source / sink modifier	N
omp_cur_iteration keyword	Y

[1]

The ompx sentinel as C/C++ pragma and C++ attributes are warned for with -Wunknown-pragmas (implied by -Wall) and -Wattributes (enabled by default), respectively; for Fortran free-source code, there is a warning enabled by default and, for fixed-source code, the omx sentinel is warned for with with -Wsurprising (enabled by -Wall). Unknown clauses are always rejected with an error.

Other new OpenMP 5.2 features

Description	Status	Comments
For Fortran, optional comma between directive and clause	N
Conforming device numbers and omp_initial_device and omp_invalid_device enum/PARAMETER	Y
Initial value of default-device-var ICV with OMP_TARGET_OFFLOAD=mandatory	N
interop_types in any position of the modifier list for the init clause of the interop construct	N