[llvm] [BOLT] Enable standalone build (PR #87196)

[via llvm-commits]

pca006132 wrote:

I tried the following:

```dockerfile
FROM ubuntu:22.04 AS builder

ARG DEBIAN_FRONTEND=noninteractive
ENV TZ=UTC

RUN apt-get update && \
    apt-get install -y --no-install-recommends ca-certificates git \
      build-essential cmake ninja-build python3 libjemalloc-dev \
      python3-psutil && \
    rm -rf /var/lib/apt/lists

WORKDIR /home/bolt

COPY . llvm-project

RUN mkdir build && \
    cd build && \
    cmake -G Ninja ../llvm-project/llvm \
      -DLLVM_ENABLE_PROJECTS="clang;lld" \
      -DLLVM_TARGETS_TO_BUILD="X86;AArch64" \
      -DCMAKE_BUILD_TYPE=Release \
      -DLLVM_ENABLE_ASSERTIONS=ON \
      -DCMAKE_EXE_LINKER_FLAGS="-Wl,--push-state -Wl,-whole-archive -ljemalloc_pic -Wl,--pop-state -lpthread -lstdc++ -lm -ldl" \
      -DCMAKE_INSTALL_PREFIX=/home/bolt/install && \
    ninja install

RUN mkdir buildBolt && \
    cd buildBolt && \
    cmake -G Ninja ../llvm-project/bolt \
      -DLLVM_INCLUDE_TESTS=ON \
      -DLLVM_TARGETS_TO_BUILD="X86;AArch64" \
      -DCMAKE_BUILD_TYPE=Release \
      -DLLVM_ENABLE_ASSERTIONS=ON \
      -DCMAKE_EXE_LINKER_FLAGS="-Wl,--push-state -Wl,-whole-archive -ljemalloc_pic -Wl,--pop-state -lpthread -lstdc++ -lm -ldl" \
      -DBOLT_CLANG_EXE="/home/bolt/install/bin/clang" \
      -DBOLT_LLD_EXE="/home/bolt/install/bin/lld" \
      -DCMAKE_INSTALL_PREFIX=/home/bolt/install && \
    ninja check-bolt && \
    ninja install-llvm-bolt install-perf2bolt install-merge-fdata \
      install-llvm-boltdiff install-bolt_rt

FROM ubuntu:20.04

COPY --from=builder /home/bolt/install /usr/local
```

but it failed with
```
CMake Error at /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:743 (add_dependencies):
  The dependency target "AArch64CommonTableGen" of target
  "LLVMBOLTTargetAArch64" does not exist.
Call Stack (most recent call first):
  /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:874 (llvm_add_library)
  lib/Target/AArch64/CMakeLists.txt:7 (add_llvm_library)


CMake Error at /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:743 (add_dependencies):
  The dependency target "X86CommonTableGen" of target "LLVMBOLTTargetX86"
  does not exist.
Call Stack (most recent call first):
  /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:874 (llvm_add_library)
  lib/Target/X86/CMakeLists.txt:8 (add_llvm_library)


CMake Error at /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:1984 (add_dependencies):
  The dependency target "FileCheck" of target "check-bolt" does not exist.
Call Stack (most recent call first):
  /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:2050 (add_lit_target)
  test/CMakeLists.txt:69 (add_lit_testsuite)


CMake Error at /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:1984 (add_dependencies):
  The dependency target "count" of target "check-bolt" does not exist.
Call Stack (most recent call first):
  /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:2050 (add_lit_target)
  test/CMakeLists.txt:69 (add_lit_testsuite)


CMake Error at /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:1984 (add_dependencies):
  The dependency target "llvm-readelf" of target "check-bolt" does not exist.
Call Stack (most recent call first):
  /home/bolt/install/lib/cmake/llvm/AddLLVM.cmake:2050 (add_lit_target)
  test/CMakeLists.txt:69 (add_lit_testsuite)
...
```

Not sure why. When I compile using nix, it works fine. Maybe some cmake flag is not set correctly?

https://github.com/llvm/llvm-project/pull/87196