Linking with ld.gold fails: "nostart-stop-gc: unknown -z option"

[dtolnay]

I hit this in dtolnay/proc-macro2#494. Compilers nightly-2025-03-08 and older work, but nightly-2025-03-09 and newer fail as follows:

$ cargo hfuzz build
   Compiling semver v1.0.26
   Compiling honggfuzz v0.5.56
   Compiling proc-macro2 v1.0.94
   Compiling unicode-ident v1.0.18
   Compiling lazy_static v1.5.0
   Compiling arbitrary v1.4.1
   Compiling rustc_version v0.4.1
   Compiling proc-macro2-fuzz v0.0.0
error: linking with `cc` failed: exit status: 1
  |
  = note:  "cc" "-m64" "/tmp/rustcKwt18g/symbols.o" "<6 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "hfuzz_target/x86_64-unknown-linux-gnu/release/deps/{libproc_macro2-52b56881b388848b.rlib,libunicode_ident-c8c3ebc46cfbdef7.rlib,libhonggfuzz-ab26354189c9f60e.rlib,liblazy_static-5fed7bd649267e72.rlib,libarbitrary-c41b6f4856e8de4a.rlib}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,liballoc-*,librustc_std_workspace_core-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcKwt18g/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,-znostart-stop-gc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "hfuzz_target/x86_64-unknown-linux-gnu/release/build/honggfuzz-0aa6eef419f64960/out" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "hfuzz_target/x86_64-unknown-linux-gnu/release/deps/parse_token_stream-0d38af20dbe11731" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-Wl,--strip-debug" "-nodefaultlibs" "-fuse-ld=gold"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: /usr/bin/ld.gold: nostart-stop-gc: unknown -z option
          /usr/bin/ld.gold: use the --help option for usage information
          collect2: error: ld returned 1 exit status
          
error: could not compile `proc-macro2-fuzz` (bin "parse_token_stream") due to 1 previous error

Bisects to rust-lang/rust#137685.

Workaround: dtolnay/proc-macro2#495 RUSTFLAGS=-Clink-arg=-fuse-ld=lld

[PaulGrandperrin]

Ok, I get it too in the tests: https://github.com/rust-fuzz/honggfuzz-rs/actions/runs/13797943511/job/38593982311#step:5:449

I'll check that tomorrow