Build Error: dyld: Library not loaded: @rpath/libLTO.dylib

[masonforest]

Thanks for building this! Looking forward to faster build times in rust!

I get the following error when I add rustflags = ["-C", "link-arg=-fuse-ld=/usr/local/bin/zld"] to my .cargo/config in a new project.

   Compiling zld-test v0.1.0 (/Users/masonf/tmp/zld-test)
error: linking with `cc` failed: exit code: 254
  |
  = note: "cc" "-m64" "-arch" "x86_64" "-L" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.13szzbm9m7o8hf39.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.1lh18tvtd6vcclj1.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.1mmadohbzflleaqa.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.401gmkzqigm812a3.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.49qxyy7lldwzjw1n.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.4l37xpyn5no2cf6k.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.g8z62udr0eka5tu.rcgu.o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.opiiwg2x64dug10.rcgu.o" "-o" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test" "/Users/masonf/tmp/zld-test/target/debug/deps/zld_test.pqrzvuhhu5pet8g.rcgu.o" "-Wl,-dead_strip" "-nodefaultlibs" "-L" "/Users/masonf/tmp/zld-test/target/debug/deps" "-L" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libstd-2eead91d91f66ffa.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libpanic_unwind-ca64d94f6b79d639.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libobject-f7936dd792262a74.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libaddr2line-bb56016a39783030.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libgimli-1873d4fc46d20288.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_demangle-55bacf2d542c4144.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libhashbrown-ff8a738b6f2b559a.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_std_workspace_alloc-3864ce8d4cb7a483.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libunwind-b55c7050747b13c5.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcfg_if-1571a545da17c3ef.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liblibc-ff818040cbe57af0.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liballoc-0a2b336e241cf742.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_std_workspace_core-465082706ea1ede1.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcore-e3cd79f6ad1173fd.rlib" "/Users/masonf/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcompiler_builtins-4071d15d8824a4bb.rlib" "-lSystem" "-lresolv" "-lc" "-lm" "-fuse-ld=/usr/local/bin/zld"
  = note: dyld: Library not loaded: @rpath/libLTO.dylib
            Referenced from: /usr/local/bin/zld
            Reason: image not found
          clang: error: unable to execute command: Abort trap: 6
          clang: error: linker command failed due to signal (use -v to see invocation

Looks like that file is here: $ ls /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib

I tried running LD_PATH=/Library/Developer/CommandLineTools/usr/lib cargo run with no luck.

Thanks in advance!

-Mason

[michaeleisel]

right now it requires having xcode to use zld. i've updated the readme to show this. i'll take a look at making it easier sometime soon