55151e138d
This patch contains the initial support for building LLVM's libc as a target for the GPU. Currently this only supports a handful of very basic functions that can be implemented without an operating system. The GPU code is build using the existing OpenMP toolchain. This allows us to minimally change the existing codebase and get a functioning static library. This patch allows users to create a static library called `libcgpu.a` that contains fat binaries containing device IR. Current limitations are the lack of test support and the fact that only one target OS can be built at a time. That is, the user cannot get a `libc` for Linux and one for the GPU simultaneously. This introduces two new CMake variables to control the behavior `LLVM_LIBC_TARET_OS` is exported so the user can now specify it to equal `"gpu"`. `LLVM_LIBC_GPU_ARCHITECTURES` is also used to configure how many targets to build for at once. Depends on D138607 Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D138608 |
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| .. | ||
| cpu_features | ||
| LLVMLibCArchitectures.cmake | ||
| LLVMLibCCheckCpuFeatures.cmake | ||
| LLVMLibCCheckMPFR.cmake | ||
| LLVMLibCFlagRules.cmake | ||
| LLVMLibCHeaderRules.cmake | ||
| LLVMLibCLibraryRules.cmake | ||
| LLVMLibCObjectRules.cmake | ||
| LLVMLibCRules.cmake | ||
| LLVMLibCTargetNameUtils.cmake | ||
| LLVMLibCTestRules.cmake | ||