640ba3f8d1
Summary: The GPU target has recently been changed to support standard `libc` build rules. This means we should be able to build for it both in `LLVM_ENABLE_PROJECTS` mode, or targeting the runtimes directory directly as in the LLVM `libc` documentation. Previously this failed because the version check on the compiler was too strict and the `--target=` options were not being set on the link jobs unless in CMake cross compiliation mode. This patch fixes those so the following config should work now to build the GPU target directly if using NVPTX. ``` cmake ../runtimes -DCMAKE_BUILD_TYPE=Release \ -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang \ -DLLVM_ENABLE_RUNTIMES=libc -DLLVM_RUNTIMES_TARGET=nvptx64-nvidia-cuda \ -DLLVM_DEFAULT_TARGET_TRIPLE=nvptx64-nvidia-cuda \ -DLIBC_HDRGEN_EXE=/path/to/hdrgen/libc-hdrgen \ -DLLVM_LIBC_FULL_BUILD=ON -GNinja ```
LLVM libc ========= This directory and its subdirectories contain source code for llvm-libc, a retargetable implementation of the C standard library. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.