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| author | Joseph Huber <jhuber6@vols.utk.edu> | 2023-04-17 09:11:09 -0500 |
|---|---|---|
| committer | Joseph Huber <jhuber6@vols.utk.edu> | 2023-04-17 11:51:34 -0500 |
| commit | e2356fb07e57538cbe5f731f23fc574848ea9bb1 (patch) | |
| tree | 39da12525fa6cc55cc70929c88666c0bd7f430eb /libc/startup | |
| parent | 1f5e737fc135bf991889a1364b8f8c5edc3953d2 (diff) | |
| download | llvm-e2356fb07e57538cbe5f731f23fc574848ea9bb1.zip llvm-e2356fb07e57538cbe5f731f23fc574848ea9bb1.tar.gz llvm-e2356fb07e57538cbe5f731f23fc574848ea9bb1.tar.bz2 | |
[libc] Add special handling for CUDA PTX features
The NVIDIA compilation path requires some special options. This is
mostly because compilation is dependent on having a valid CUDA
toolchain. We don't actually need the CUDA toolchain to create the
exported `libcgpu.a` library because it's pure LLVM-IR. However, for
some language features we need the PTX version to be set. This is
normally set by checking the CUDA version, but without one installed it
will fail to build. We instead choose a minimum set of features on the
desired target, inferred from
https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#release-notes
and the PTX refernece for functions like `nanosleep`.
Reviewed By: tianshilei1992
Differential Revision: https://reviews.llvm.org/D148532
Diffstat (limited to 'libc/startup')
| -rw-r--r-- | libc/startup/gpu/nvptx/CMakeLists.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libc/startup/gpu/nvptx/CMakeLists.txt b/libc/startup/gpu/nvptx/CMakeLists.txt index f8839e9..4966169 100644 --- a/libc/startup/gpu/nvptx/CMakeLists.txt +++ b/libc/startup/gpu/nvptx/CMakeLists.txt @@ -1,3 +1,4 @@ +get_nvptx_compile_options(nvptx_options ${LIBC_GPU_TARGET_ARCHITECTURE}) add_startup_object( crt1 SRC @@ -8,9 +9,8 @@ add_startup_object( -ffreestanding # To avoid compiler warnings about calling the main function. -fno-builtin -nogpulib # Do not include any GPU vendor libraries. - -march=${LIBC_GPU_TARGET_ARCHITECTURE} --target=${LIBC_GPU_TARGET_TRIPLE} - --cuda-path=${LIBC_CUDA_ROOT} + ${nvptx_options} NO_GPU_BUNDLE # Compile this file directly without special GPU handling. ) get_fq_target_name(crt1 fq_name) |