我正在尝试使用rand
或rand_core
生成随机数。根据文档,可以使用default-features = false
启用#![no_std]
使用。所以我试着对rand
和rand_core
都这样做,看看两者是否都有效。我在这两种情况下都得到了相同的错误,所以我展示了我为rand_core
所做的操作。
rand_core = {version = "0.5.1", default-features = false}
然后导入为:
use rand_core::RngCore;
然而,我得到了以下错误(我还没有写这部分代码(:
error[E0152]: found duplicate lang item `oom`
--> src/alloc.rs:116:1
|
116 | / fn alloc_error_handler(layout: Layout) -> ! {
117 | | panic!("allocation error: {:?}", layout)
118 | | }
| |_^
|
= note: the lang item is first defined in crate `std` (which `rand_core` depends on)
error[E0152]: found duplicate lang item `panic_impl`
--> src/panic.rs:21:1
|
21 | / fn panic(info: &PanicInfo) -> ! {
22 | | let mut host_stderr = ErStderr::default();
23 | |
24 | | writeln!(host_stderr, "{}", info).ok();
25 | |
26 | | unsafe {libc::exit(1); }
27 | | }
| |_^
|
= note: the lang item is first defined in crate `std` (which `rand_core` depends on)
error[E0152]: found duplicate lang item `eh_personality`
--> src/panic.rs:29:28
|
29 | #[lang = "eh_personality"] extern fn eh_personality() {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the lang item is first defined in crate `panic_unwind` (which `std` depends on)
以下是一个最小的工作示例:https://play.rust-lang.org/?version=nightly&mode=调试&edition=2018&gist=7e748b901ea22742c878e8208d9c0691
我每晚都在用。
这是我的Cargo.toml
。
[dependencies]
libc = "0.2"
cbindgen = "0.12.2"
rand_core = {version = "0.5.1", default-features=false}
[lib]
crate-type = ["staticlib"]
我不知道为什么这样做,但当我从依赖项列表中删除cbindgen
时,一切都会自动工作。