cargo objdump fails on -triple flag when used with a recent LLVM 11 #269
Description
Running cargo objdump --bin app --release -- -disassemble -no-show-raw-insn -print-imm-hex as suggested in Inspecting section of QEMU chapter can produce the following error:
cargo objdump --bin app --release -- -disassemble -no-show-raw-insn -print-imm-hex
Finished release [optimized + debuginfo] target(s) in 0.02s
llvm-objdump: Unknown command line argument '-triple'. Try: '/home/vk/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-objdump --help'
llvm-objdump: Did you mean '--triple'?
llvm-objdump: Unknown command line argument '-disassemble'. Try: '/home/vk/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-objdump --help'
llvm-objdump: Did you mean '--disassemble'?
llvm-objdump: Unknown command line argument '-no-show-raw-insn'. Try: '/home/vk/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-objdump --help'
llvm-objdump: Did you mean '--no-show-raw-insn'?
llvm-objdump: for the --reloc option: may only occur zero or one times!
llvm-objdump: Unknown command line argument '-print-imm-hex'. Try: '/home/vk/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin/llvm-objdump --help'
llvm-objdump: Did you mean '--print-imm-hex'?
It seems that it's fixed with rust-embedded/cargo-binutils@aa5464b, but might not been yet published on crates.io (rust-embedded/cargo-binutils#93)
I'm using Ubuntu 20.04 with following llvm-objdump version:
bin/llvm-objdump --version
LLVM (http://llvm.org/):
LLVM version 11.0.0-rust-1.47.0-stable
Optimized build.
Default target: x86_64-unknown-linux-gnu
Host CPU: ivybridge
The workaround for me was installing cargo-binutils from GitHub and running it with double hyphens for all flags:
cargo install --git https://github.com/rust-embedded/cargo-binutils.git
cargo objdump --bin app --release -- --disassemble --no-show-raw-insn --print-imm-hex