Stop installing obsolete swift-build-tool executable

[owenv]

swiftlang/swift-llbuild#1013 removes swift-build-tool from the products of llbuild, as it's no longer used during SwiftPM builds or bootstrapping. Remove the reference in build-script-impl

[owenv]

@swift-ci test

[owenv]

@swift-ci build toolchain

[owenv]

It's possible this change is too narrow - however, we do still need to build llbuild here to support the SwiftPM bootstrap, we just don't need to install anything it produces

[etcwilde]

If it's only used for bootstrapping, do we need llbuild in build-script-impl at all? It looks like SwiftPM's bootstrap script already builds llbuild, or at least has logic for building it:

def build_llbuild(args):
    """Builds LLBuild using CMake."""
    logging.info("Building llbuild")

    # Set where we are going to build llbuild for future steps to find it
    args.build_dirs["llbuild"] = os.path.join(args.target_dir, "llbuild")

    api_dir = os.path.join(args.build_dirs["llbuild"], ".cmake/api/v1/query")
    mkdir_p(api_dir)
    call(["touch", "codemodel-v2"], cwd=api_dir, verbose=args.verbose)

    flags = [
        "-DCMAKE_C_COMPILER:=%s" % (args.clang_path),
        "-DCMAKE_CXX_COMPILER:=%s" % (args.clangxx_path),
        "-DCMAKE_AR:PATH=%s" % (args.ar_path),
        "-DCMAKE_RANLIB:PATH=%s" % (args.ranlib_path),
        "-DLLBUILD_SUPPORT_BINDINGS:=Swift",
    ]
    cmake_env = []

    if platform.system() == 'Darwin':
        # On Darwin, make sure we're building for the host architecture.
        flags.append("-DCMAKE_OSX_ARCHITECTURES:=%s" % (get_build_target(args).split('-')[0]))
        # Inject linkage of C++ standard library
        cmake_env.append("LDFLAGS=-lc++")

    if args.sysroot:
        flags.append("-DSQLite3_INCLUDE_DIR=%s/usr/include" % args.sysroot)

    args.source_dirs["llbuild"] = get_llbuild_source_path(args)
    build_with_cmake(args, flags, [], args.source_dirs["llbuild"], args.build_dirs["llbuild"], cmake_env=cmake_env)

https://github.com/swiftlang/swift-package-manager/blob/a112ab817dafb40f3d95daaa31b034f7c766fa8e/Utilities/bootstrap#L663-L693

[owenv]

@etcwilde I considered that, but I wasn't sure what should be responsible for running the llbuild tests if I made that change.

[owenv]

@swift-ci smoke test

[owenv]

@swift-ci build toolchain

[owenv]

@swift-ci please build toolchain windows

[owenv]

Unclear what the problem on Windows actually is

Archiving artifacts
‘build/artifacts/*’ doesn’t match anything, but ‘*’ does. Perhaps that’s what you mean?
ERROR: Step ‘Archive the artifacts’ failed: No artifacts found that match the file pattern "build/artifacts/*". Configuration error?

[finagolfin]

Thanks for doing this, I've been doing the same with my native Android toolchain for a while now. Maybe dump a warning for people who are unknowingly using this flag still, and remove install-llbuild from all build presets, since it does nothing now?

I thought about removing the flag altogether, but it looks like it is automatically generated in build-script-impl, so that's not possible.