estewart08 0e7262407c
[offload] - Remove standalone build in favor of 'runtimes' (#170693)
Summary:
Follow up on removal of OPENMP_STANDALONE_BUILD in openmp (#149878).
This
build method is redundant and can be accomplished via runtimes.

Removes support for:
`cmake -S <llvm-project>/offload ...`

 Switches over to:
`make -S <llvm-project>/runtimes -DLLVM_ENABLE_RUNTIMES=openmp;offload
...`

Libomptarget has a dependency on libomp.so and requires the omp cmake
target to exist at build time, which is why both runtimes are listed.

Updates cmake compiler logic in offload/CMakeLists.txt to mirror openmp
changes:
 [openmp] Allow testing OpenMP without a full clang build tree (#182470)

User will still need to have a separate invocation to build openmp
DeviceRTL via:
`-DLLVM_ENABLE_RUNTIMES=openmp`
`-DLLVM_DEFAULT_TARGET_TRIPLE=<amdgcn-amd-amdhsa|nvptx64-nvidia-cuda>`
2026-03-19 09:00:40 -05:00
..
2024-11-17 07:32:29 -08:00

The LLVM/Offload Subproject

The Offload subproject aims at providing tooling, runtimes, and APIs that allow users to execute code on accelerators or other "co-processors" that may or may not match the architecture of their "host". In the long run, all kinds of targets are in scope of this effort, including but not limited to: CPUs, GPUs, FPGAs, AI/ML accelerators, distributed resources, etc.

For OpenMP offload users, the project is ready and fully usable. The final API design is still under development. More content will show up here and on our webpage soon. In the meantime, people are encouraged to participate in our meetings (see below) and check our development board as well as the discussions on Discourse.

Meetings

Every second Wednesday, 7:00 - 8:00am PT, starting Jan 24, 2024. Alternates with the OpenMP in LLVM meeting. invite.ics Meeting Minutes and Agenda