第一章 mainCRTStartup容易误大写Up

[huangjj27]

环境信息

OS: Windows 10
rustc: rustc 1.32.0 (9fda7c223 2019-01-16)
toolchain: stable-x86_64-pc-windows-msvc (default), nightly-x86_64-pc-windows-msvc
c++构建工具: VS2017 Community

例程

# cargo.toml
[package]
name = "blog_os"
version = "0.1.0"
authors = ["huangjj27 <huangjj.27@qq.com>"]
edition = "2018"

[profile.dev]
panic = "abort"

[profile.release]
panic = "abort"

[dependencies]

// main.rs
#![no_std]
#![no_main]

use core::panic::PanicInfo;

#[panic_handler]
fn panic(_info: &PanicInfo) -> ! {
    loop {}
}

// 由于在Windows环境下编译, 故只摘抄Windows所需函数
#[no_mangle]
pub extern "C" fn mainCRTStartUp() -> ! {
    main();
}

#[no_mangle]
pub extern "C" fn main() -> ! {
    loop {}
}

报错信息

error: linking with `link.exe` failed: exit code: 1120
  |
  = note: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.14.26428\\bin\\HostX64\\x64\\link.exe" "/NOLOGO" "/NXCOMPAT" "/LIBPATH:C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib" "C:\\Users\\34937\\Desktop\\learning-rust\\blog_os\\target\\debug\\deps\\blog_os-d19438c79a36ae28.4gg7n8zj6teng6ow.rcgu.o" "/OUT:C:\\Users\\34937\\Desktop\\learning-rust\\blog_os\\target\\debug\\deps\\blog_os-d19438c79a36ae28.exe" "/OPT:REF,NOICF" "/DEBUG" "/NATVIS:C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\etc\\intrinsic.natvis" "/NATVIS:C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\etc\\liballoc.natvis" "/NATVIS:C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\etc\\libcore.natvis" "/LIBPATH:C:\\Users\\34937\\Desktop\\learning-rust\\blog_os\\target\\debug\\deps" "/LIBPATH:C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib" "C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\librustc_std_workspace_core-78a7055b7313c664.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libcore-b9ee21a1be63ac89.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\nightly-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libcompiler_builtins-82c426bab9a155a3.rlib"
  = note: Non-UTF-8 output: LINK : error LNK2001: \xce\xde\xb7\xa8\xbd\xe2\xce\xf6\xb5\xc4\xcd\xe2\xb2\xbf\xb7\xfb\xba\xc5 mainCRTStartup\r\nC:\\Users\\34937\\Desktop\\learning-rust\\blog_os\\target\\debug\\deps\\blog_os-d19438c79a36ae28.exe : fatal error LNK1120: 1 \xb8\xf6\xce\xde\xb7\xa8\xbd\xe2\xce\xf6\xb5\xc4\xcd\xe2\xb2\xbf\xc3\xfc\xc1\xee\r\n

error: aborting due to previous error

error: Could not compile `blog_os`.

To learn more, run the command again with --verbose.

参考信息

错误信息出现原因请参考: https://docs.microsoft.com/en-us/cpp/error-messages/tool-errors/linker-tools-error-lnk2001?view=vs-2017

另外找到了 可能 类似的rust连接c问题rust-lang/rust#31233
https://stackoverflow.com/questions/40548334/rust-code-cannot-link-with-a-c-library-compiled-on-windows-because-there-is-an-u

[huangjj27]

该出错由于mainCRTStartup函数错写成了mainCRTStartUp函数, U字母误大写. 问题已经解决

[luojia65]

Ok