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I use the following cmake config to build offload and openmp ``` cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86" -DLLVM_ENABLE_PROJECTS="clang;openmp" -DLLVM_ENABLE_RUNTIMES="offload" -DLLVM_LIT_ARGS="-vv -a" -DLLVM_ENABLE_ASSERTIONS=ON ../llvm ``` and got the following error: ``` CMake Error at /tmp/build-llvm/llvm/offload/CMakeLists.txt:321 (pythonize_bool): Unknown CMake command "pythonize_bool". ``` After some search I find out that the "correct" way to build this is putting openmp and offload to the ENABLE_RUNTIMES like ``` cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86" -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_ENABLE_RUNTIMES="openmp;offload" -DLLVM_LIT_ARGS="-vv -a" -DLLVM_ENABLE_ASSERTIONS=ON ../llvm ``` . But since we don't forbid to config them using openmp as PROJECT and offload as RUNTIME, then we probably support it. The fix is to always define the pythonize_bool macro. For cmake, it is okay to redefine a macro, it does not cause a warning or else.
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.
The project is just starting and the design is still not ironed out. 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