[all-commits] [llvm/llvm-project] 2700da: [LLD] Allow usage of LLD as a library

[Alexandre Ganea via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2700da5fe28d8b17c66e5c960d2188276a6ced39
      https://github.com/llvm/llvm-project/commit/2700da5fe28d8b17c66e5c960d2188276a6ced39
  Author: Alexandre Ganea <alex_toresh at yahoo.fr>
  Date:   2023-06-13 (Tue, 13 Jun 2023)

  Changed paths:
    M lld/CMakeLists.txt
    M lld/COFF/Driver.cpp
    M lld/Common/CMakeLists.txt
    A lld/Common/DriverDispatcher.cpp
    M lld/ELF/Driver.cpp
    M lld/MachO/Driver.cpp
    M lld/MinGW/Driver.cpp
    M lld/docs/NewLLD.rst
    M lld/docs/index.rst
    M lld/include/lld/Common/Driver.h
    M lld/test/CMakeLists.txt
    A lld/test/Unit/lit.cfg.py
    A lld/test/Unit/lit.site.cfg.py.in
    M lld/tools/lld/lld.cpp
    A lld/unittests/AsLibAll/AllDrivers.cpp
    A lld/unittests/AsLibAll/CMakeLists.txt
    A lld/unittests/AsLibELF/CMakeLists.txt
    A lld/unittests/AsLibELF/Inputs/kernel1.o
    A lld/unittests/AsLibELF/Inputs/kernel2.o
    A lld/unittests/AsLibELF/ROCm.cpp
    A lld/unittests/AsLibELF/SomeDrivers.cpp
    A lld/unittests/CMakeLists.txt
    M lld/wasm/Driver.cpp
    M llvm/cmake/modules/AddLLVM.cmake

  Log Message:
  -----------
  [LLD] Allow usage of LLD as a library

As discussed in https://github.com/llvm/llvm-project/issues/53475 this patch allows using LLD-as-a-lib. It also lets clients link only the drivers that they want (see unit tests).

This also adds the unit test infra as in the other LLVM projects. Among the test coverage, I've added the original issue from @krzysz00, see: https://github.com/ROCmSoftwarePlatform/D108850-lld-bug-reproduction

Important note: this doesn't allow (yet) linking in parallel. This will come a bit later, in subsequent patches, for COFF at last.

Differential revision: https://reviews.llvm.org/D119049