bootstrap: `use-linker` breaks build

[matthiaskrgr]

Summary

Command used

./x.py build

Expected behaviour

pass

Actual behaviour

fail

Bootstrap configuration (bootstrap.toml)

change-id = 138934
[llvm]
download-ci-llvm = false
optimize = true
thin-lto = true
release-debuginfo = true
assertions = true
plugins = true
ninja = true
targets = "X86"
link-jobs = 4
cflags = "-march=native"
cxxflags = "-march=native"
ldflags = "-march=native"
use-linker ="/usr/bin/ld.lld"
[gcc]
[build]
[install]
[rust]
[target.x86_64-unknown-linux-gnu]
[dist]

Operating system

6.13.8-2-MANJARO

HEAD

d3508a8

Additional context

Build Log

Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.11s
Building LLVM for x86_64-unknown-linux-gnu
CMAKE_TOOLCHAIN_FILE_x86_64-unknown-linux-gnu = None
CMAKE_TOOLCHAIN_FILE_x86_64_unknown_linux_gnu = None
HOST_CMAKE_TOOLCHAIN_FILE = None
CMAKE_TOOLCHAIN_FILE = None
CMAKE_PREFIX_PATH_x86_64-unknown-linux-gnu = None
CMAKE_PREFIX_PATH_x86_64_unknown_linux_gnu = None
HOST_CMAKE_PREFIX_PATH = None
CMAKE_PREFIX_PATH = None
CMAKE_x86_64-unknown-linux-gnu = None
CMAKE_x86_64_unknown_linux_gnu = None
HOST_CMAKE = None
CMAKE = None
running: cd "/home/matthias/vcs/github/rust_debug_assertions/build/x86_64-unknown-linux-gnu/llvm/build" && CMAKE_PREFIX_PATH="" DESTDIR="" LC_ALL="C" "cmake" "/home/matthias/vcs/github/rust_debug_assertions/src/llvm-project/llvm" "-G" "Ninja" "-DLLVM_ENABLE_ASSERTIONS=ON" "-DLLVM_UNREACHABLE_OPTIMIZE=OFF" "-DLLVM_ENABLE_PLUGINS=ON" "-DLLVM_TARGETS_TO_BUILD=X86" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR;M68k;CSKY;Xtensa" "-DLLVM_INCLUDE_EXAMPLES=OFF" "-DLLVM_INCLUDE_DOCS=OFF" "-DLLVM_INCLUDE_BENCHMARKS=OFF" "-DLLVM_INCLUDE_TESTS=OFF" "-DLLVM_ENABLE_LIBEDIT=OFF" "-DLLVM_ENABLE_BINDINGS=OFF" "-DLLVM_ENABLE_Z3_SOLVER=OFF" "-DLLVM_PARALLEL_COMPILE_JOBS=16" "-DLLVM_TARGET_ARCH=x86_64" "-DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-gnu" "-DLLVM_ENABLE_WARNINGS=OFF" "-DLLVM_INSTALL_UTILS=ON" "-DLLVM_ENABLE_ZLIB=ON" "-DLLVM_LINK_LLVM_DYLIB=ON" "-DLLVM_ENABLE_LIBXML2=OFF" "-DLLVM_PARALLEL_LINK_JOBS=4" "-DLLVM_VERSION_SUFFIX=-rust-dev" "-DCMAKE_INSTALL_MESSAGE=LAZY" "-DCMAKE_C_COMPILER=clang" "-DCMAKE_CXX_COMPILER=clang++" "-DCMAKE_ASM_COMPILER=clang" "-DCMAKE_C_FLAGS=-ffunction-sections -fdata-sections -fPIC -m64 --target=x86_64-unknown-linux-gnu -march=native" "-DCMAKE_CXX_FLAGS=-ffunction-sections -fdata-sections -fPIC -m64 --target=x86_64-unknown-linux-gnu -march=native" "-DCMAKE_SHARED_LINKER_FLAGS= -march=native" "-DCMAKE_MODULE_LINKER_FLAGS= -march=native" "-DCMAKE_EXE_LINKER_FLAGS= -march=native" "-DLLVM_ENABLE_LTO=Thin" "-DLLVM_ENABLE_LLD=ON" "-DLLVM_ENABLE_ZSTD=OFF" "-DLLVM_USE_LINKER=/usr/bin/ld.lld" "-DCMAKE_INSTALL_PREFIX=/home/matthias/vcs/github/rust_debug_assertions/build/x86_64-unknown-linux-gnu/llvm" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 --target=x86_64-unknown-linux-gnu" "-DCMAKE_BUILD_TYPE=RelWithDebInfo"
CMake Deprecation Warning at /home/matthias/vcs/github/rust_debug_assertions/src/llvm-project/cmake/Modules/CMakePolicy.cmake:6 (cmake_policy):
  The OLD behavior for policy CMP0116 will be removed from a future version
  of CMake.

  The cmake-policies(7) manual explains that the OLD behaviors of all
  policies are deprecated and that a policy should be set to OLD only under
  specific short-term circumstances.  Projects should be ported to the NEW
  behavior and not rely on setting a policy to OLD.
Call Stack (most recent call first):
  CMakeLists.txt:8 (include)


-- LLVM host triple: x86_64-unknown-linux-gnu
-- Native target architecture is X86
-- Threads enabled.
-- Doxygen disabled.
-- Ninja version: 1.12.1
-- Could NOT find OCaml (missing: OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH)
-- OCaml bindings disabled.
-- LLVM default target triple: x86_64-unknown-linux-gnu
CMake Error at cmake/modules/HandleLLVMOptions.cmake:384 (message):
  LLVM_ENABLE_LLD and LLVM_USE_LINKER can't be set at the same time
Call Stack (most recent call first):
  CMakeLists.txt:1019 (include)


-- Configuring incomplete, errors occurred!

thread 'main' panicked at /home/matthias/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/cmake-0.1.54/src/lib.rs:1119:5:

command did not execute successfully, got: exit status: 1

build script failed, must exit now
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
	finished in 0.367 seconds
Build completed unsuccessfully in 0:00:00

[Kobzol]

use-linker and LLD cannot really be used like this on Linux, because the linker is invoked through the compiler driver, not directly. If you want to use external LLD, use rust.use-lld = true.