Can't cross compile from Linux to Windows (x86_64)

[bozaro]

Environment:

• Ubuntu 16.04 LTS final beta (lxc-create -n rust -t ubuntu -- --release xenial)
• Mingw (apt install mingw-w64)
• rustup tool (curl https://sh.rustup.rs -sSf | sh)
• Rust 1.8 and nightly (rustup default beta/rustup default nightly)
• Rust windows x86_64 toolchain (rustup target add x86_64-pc-windows-gnu)

I create a sample file hello.rs:

fn main() {
    println!("Hello, world!");
}

And run compilation:

rustc -v -C linker=x86_64-w64-mingw32-ld --target x86_64-pc-windows-gnu hello.rs

I expected hello.exe file, but has error:

error: linking with `x86_64-w64-mingw32-ld` failed: exit code: 1
note: "x86_64-w64-mingw32-ld" "-Wl,--enable-long-section-names" "-fno-use-linker-plugin" "-Wl,--nxcompat" "-nostdlib" "-m64" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/crt2.o" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/rsbegin.o" "-L" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib" "hello.0.o" "-o" "hello.exe" "-Wl,--gc-sections" "-nodefaultlibs" "-L" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib" "-Wl,-Bstatic" "-Wl,-Bdynamic" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/libstd-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/libcollections-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/librustc_unicode-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/librand-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/liballoc-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/liballoc_system-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/liblibc-18402db3.rlib" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/libcore-18402db3.rlib" "-l" "gcc_eh" "-l" "ws2_32" "-l" "userenv" "-l" "shell32" "-l" "advapi32" "-l" "compiler-rt" "-lmingwex" "-lmingw32" "-lgcc" "-lmsvcrt" "-luser32" "-lkernel32" "/home/ubuntu/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/rsend.o"
note: x86_64-w64-mingw32-ld: unrecognised emulation mode: 64
Supported emulations: i386pep i386pe

error: aborting due to previous error

[bozaro]

Same issue with Ubuntu 14.04.4 LTS

[alexcrichton]

Right now the linker specified with -C linker is actually expected to look like gcc, so if you pass x86_64-w64-mingw32-gcc, does it work?

[bozaro]

rustc -v -C linker=x86_64-w64-mingw32-gcc --target x86_64-pc-windows-gnu hello.rs

Works correctlly.

[L-as]

Will this ever be fixed? It doesn't make sense to use gcc as the linker...

[TheRadioGuy]

@laaas +1