DioxusLabs/dioxus · error

Binary format not supported

Error message

Binary format not supported

What it means

The CLI's linker stub hit a target binary format it cannot synthesize an object file for. Only Elf, Coff, MachO, and Wasm are handled; any other target_lexicon BinaryFormat falls through to this unimplemented arm while creating the placeholder object file.

Source

Thrown at packages/cli/src/cli/link.rs:208

                // This creates an object file that satisfies rust's use of llvm-objcopy
                //
                // I'd rather we *not* do this and instead generate a truly linked file (and then delete it) but
                // this at least lets us delay linking until the host compiler is ready.
                //
                // This is because our host compiler is a stateful server and not a stateless linker.
                //
                // todo(jon): do we use Triple::host or the target triple? I think I ran into issues
                // using the target triple, hence the use of "host" but it might not even matter?
                let triple = Triple::host();
                let format = match triple.binary_format {
                    target_lexicon::BinaryFormat::Elf => object::BinaryFormat::Elf,
                    target_lexicon::BinaryFormat::Coff => object::BinaryFormat::Coff,
                    target_lexicon::BinaryFormat::Macho => object::BinaryFormat::MachO,
                    target_lexicon::BinaryFormat::Wasm => object::BinaryFormat::Wasm,
                    target_lexicon::BinaryFormat::Xcoff => object::BinaryFormat::Xcoff,
                    target_lexicon::BinaryFormat::Unknown => unimplemented!(),
                    _ => unimplemented!("Binary format not supported"),
                };

                let arch = match triple.architecture {
                    target_lexicon::Architecture::Wasm32 => object::Architecture::Wasm32,
                    target_lexicon::Architecture::Wasm64 => object::Architecture::Wasm64,
                    target_lexicon::Architecture::X86_64 => object::Architecture::X86_64,
                    target_lexicon::Architecture::Arm(_) => object::Architecture::Arm,
                    target_lexicon::Architecture::Aarch64(_) => object::Architecture::Aarch64,
                    target_lexicon::Architecture::LoongArch64 => object::Architecture::LoongArch64,
                    target_lexicon::Architecture::Unknown => object::Architecture::Unknown,
                    _ => unimplemented!("Architecture not supported"),
                };

                let endian = match triple.endianness() {
                    Ok(target_lexicon::Endianness::Little) => object::Endianness::Little,
                    Ok(target_lexicon::Endianness::Big) => object::Endianness::Big,
                    Err(_) => unimplemented!("Endianness not supported"),
                };

View on GitHub (pinned to 24f6a829df)

Solutions

1. The binary format of the target is not supported by the dx linker. Link a supported format (Mach-O, ELF, or PE).

When it happens

Trigger: Thrown at packages/cli/src/cli/link.rs:208 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@24f6a829df (2026-08-23). Data as JSON: /api/errors/0ca857c5e2273871. Report an issue: GitHub.