Is cross-compiling with Rust even possible on OpenBSD? I don't see rustup available, and ran into the below issues when trying a couple of different triples, with an attempted no_std "hello world".
Thank you. On 2025-01-21 17:13:11-0700, Luke A. Call <luke...@onemodel.org> wrote: > I'm attempting to follow these instructions > https://zenn.dev/zulinx86/articles/rust-nostd-101 > ...to create a no_std "hello world" in Rust, just to > see it work, and its size and speed. > > I get these two errors: > > > $cargo build --target x86_64-unknown-openbsd > Compiling baremetal_rust v0.1.0 (/home/lacall/proj/learnrust/no_std) > error: linking with `cc` failed: exit status: 1 > | > = note: LC_ALL="C" PATH="/usr/local/lib/rustlib/ > x86_64-unknown-openbsd/bin:/usr/local/lib/rustlib/ > x86_64-unknown-openbsd/bin:/usr/local/lib/rustlib/x86_64-unknown-openbsd > /bin:[...] " VSLANG="1033" "cc" "-m64" "/tmp/rustcxWUaqp/symbols.o" > "/home/lacall/proj/learnrust/no_std/target/x86_64-unknown-openbsd/ > debug/deps/baremetal_rust-a29cf966f63a7968.27oi4sy4zl19d02xz9nha6rkv. > rcgu.o" "-Wl,--as-needed" "-L" "/home/lacall/proj/learnrust/no_std/ > target/x86_64-unknown-openbsd/debug/deps" "-L" "/home/lacall/proj/ > learnrust/no_std/target/debug/deps" "-L" "/usr/local/lib/rustlib/ > x86_64-unknown-openbsd/lib" "-Wl,-Bstatic" "/usr/local/lib/rustlib/ > x86_64-unknown-openbsd/lib/librustc_std_workspace_core-02e247769dc17413. > rlib" "/usr/local/lib/rustlib/x86_64-unknown-openbsd/lib/libcore-02e24 > 7769dc17405.rlib" "/usr/local/lib/rustlib/x86_64-unknown-openbsd/lib/ > libcompiler_builtins-02e247769dc17404.rlib" "-Wl,-Bdynamic" > "-lcompiler_rt" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/usr/ > local/lib/rustlib/x86_64-unknown-openbsd/lib" "-o" "/home/lacall/proj/ > learnrust/no_std/target/x86_64-unknown-openbsd/debug/deps/ > baremetal_rust-a29cf966f63a7968" "-Wl,--gc-sections" "-pie" "-Wl,-z, > relro,-z,now" "-Wl,--strip-debug" "-nodefaultlibs" > = note: ld: error: duplicate symbol: _start > >>> defined at /usr/lib/crt0.o:(.text+0x0) > >>> defined at 27oi4sy4zl19d02xz9nha6rkv > >>> /home/lacall/proj/learnrust/no_std/target/ > x86_64-unknown-openbsd/debug/deps/baremetal_rust- > a29cf966f63a7968.27oi4sy4zl19d02xz9nha6rkv.rcgu.o:( > .text._start+0x0) > > cc: error: linker command failed with exit code 1 (use -v > to see invocation) > error: could not compile `baremetal_rust` (bin "baremetal_rust") due to 1 > previous error > > > ...or... > > > $cargo build --target x86_64-unknown-none > Compiling > baremetal_rust v0.1.0 (/home/lacall/proj/learnrust/no_std) > error[E0463]: can't find crate for `core` > | > = note: the `x86_64-unknown-none` target may not be installed > = help: consider downloading the target with `rustup target add > x86_64-unknown-none` > For more information about this error, try `rustc --explain E0463`. > error: could not compile `baremetal_rust` (bin "baremetal_rust") due to 1 > previous error > > > But I'm also interested in cross-compiling later, to other platforms, > which I will have to learn, and this makes me wonder if that will be > possible, since rustup does not seem to be available. > > Any suggestions or corrections? Thanks very much. > > Luke Call
