[all-commits] [llvm/llvm-project] 35ebe4: [Clang][OpenMP] Add partial support for Static Dev...

[Saiyedul Islam via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 35ebe4cc24f87397762e35831953c4bfe5f52def
      https://github.com/llvm/llvm-project/commit/35ebe4cc24f87397762e35831953c4bfe5f52def
  Author: Saiyedul Islam <Saiyedul.Islam at amd.com>
  Date:   2021-10-08 (Fri, 08 Oct 2021)

  Changed paths:
    M clang/lib/Driver/ToolChains/AMDGPUOpenMP.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    M clang/lib/Driver/ToolChains/CommonArgs.h
    M clang/lib/Driver/ToolChains/Cuda.cpp
    A clang/test/Driver/Inputs/openmp_static_device_link/libFatArchive.a
    A clang/test/Driver/fat_archive_amdgpu.cpp
    A clang/test/Driver/fat_archive_nvptx.cpp
    M clang/tools/clang-offload-bundler/ClangOffloadBundler.cpp

  Log Message:
  -----------
  [Clang][OpenMP] Add partial support for Static Device Libraries

An archive containing device code object files can be passed to
clang command line for linking. For each given offload target
it creates a device specific archives which is either passed to llvm-link
if the target is amdgpu, or to clang-nvlink-wrapper if the target is
nvptx. -L/-l flags are used to specify these fat archives on the command
line. E.g.
  clang++ -fopenmp -fopenmp-targets=nvptx64 main.cpp -L. -lmylib

It currently doesn't support linking an archive directly, like:
  clang++ -fopenmp -fopenmp-targets=nvptx64 main.cpp libmylib.a

Linking with x86 offload also does not work.

Reviewed By: ye-luo

Differential Revision: https://reviews.llvm.org/D105191