Rust: Doesn't build object file

[kassane]

Xmake 版本

2.8.3

操作系统版本和架构

ArchLinux

描述问题

Just build an object file and then choose the linker or pass any custom rules later. Tried same test on other supported languages: C++, C, Zig and D. No such problem during the build.

期待的结果

I expected xmake to generate just a rust object file. Allow users to choose the linker!

工程配置

add_rules("mode.debug", "mode.release")

target("xmake_rs_demo")
    set_kind("object")
    add_files("src/main.rs")

附加信息和错误日志

build set_kind("object"):

xmake -vvD
checking for platform ... linux
checking for architecture ... x86_64
checking for gcc ... /usr/bin/gcc
checking for zig ... /home/kassane/zig/master/files/zig
checking for rustc ... /usr/bin/rustc
checking for the rust compiler (rc) ... rustc
checking for /usr/bin/rustc ... ok
checking for flags (-C opt-level=3) ... ok
> rustc "-C" "opt-level=3"
error: @programdir/modules/async/runjobs.lua:256: @programdir/rules/rust/build/target.lua:52: bad argument #1 to 'mtime' (string expected, got nil)
stack traceback:
    [C]: in function 'mtime'
    [@programdir/rules/rust/build/target.lua:52]: in function 'build_sourcefiles'
    [@programdir/rules/rust/build/target.lua:83]:
    [@programdir/actions/build/build.lua:52]: in function 'jobfunc'
    [@programdir/modules/async/runjobs.lua:232]:

stack traceback:
        [C]: in function 'error'
        @programdir/core/base/os.lua:923: in function 'base/os.raiselevel'
        (...tail calls...)
        @programdir/modules/async/runjobs.lua:256: in field 'catch'
        @programdir/core/sandbox/modules/try.lua:123: in global 'try'
        @programdir/modules/async/runjobs.lua:218: in upvalue 'cotask'
        @programdir/core/base/scheduler.lua:404: in function <@programdir/core/base/scheduler.lua:397>

[waruqi]

I tried this a long time ago and failed, it's complicated and doesn't handle links well. rustc also doesn't provide any more interface parameters for me to do this.

[kassane]

Try rustc -C opt-level=3 --edition 2018 --emit=obj src/main.rs - output in $PWD - xmake need move object file

Please, allow choose rust edition, like c++ version! [edition: 2015|2018|2021] - TODO 2024

• https://github.com/rust-lang/rust/issues/117258

[waruqi]

Try rustc -C opt-level=3 --edition 2018 --emit=obj src/main.rs - output in $PWD - xmake need move object file

Please, allow choose rust edition, like c++ version! [edition: 2015|2018|2021] - TODO 2024

• Tracking Issue for RFC 3501: Edition 2024 rust-lang/rust#117258

I know it, but I don't know how to link these objects with rust system libs, modules, packages. But rustc a.rs b.rs ... will do some automatically.

[taooceros]

~~May I ask why by default xmake uses 2018 edition? I don't know how to change it, even though my config toml is using 2021.~~

nevermind I found it, but it seems not in the docs and pretty hard to figure out how to do it.