[rust-lang/rust] linking armv7-unknown-linux-ohos target, rust-lld: error: undefined symbol: rust_eh_personality

### ROOT CAUSE The error occurs because the linker cannot find the `rust_eh_personality` symbol, which is related to Rust's exception handling (EH). This can happen when the compiler and linker versions are mismatched or when the necessary EH symbols are not being included correctly, especially when using LTO optimization. The `rust_eh_personality` is typically part of the Rust runtime, so if it's missing, it indicates a problem with symbol visibility or linking. ### CODE FIX To resolve the issue, modify the build command to include the necessary flags for EH and LTO compatibility. Add `-C linker=cc` to specify the correct linker and include `-Wl,--eh-frame-hdr` to ensure EH frames are included. Additionally, ensure the target's sysroot is correctly configured. ```bash cargo build --target=armv7-unknown-linux-ohos \ --release \ -C linker=cc \ -Wl,--eh-frame-hdr \ -Wl,--disable-threads \ -- \ -mcpu=generic \ -mfloat-abi=hard \ -mabi=lp64 \ -L /lib \ -I /include ``` This fix ensures that the linker uses the correct toolchain and includes necessary EH symbols, resolving the undefined symbol error.