Closed as not planned
Description
mkdir repro
cd repro
cargo init
cargo add libc
cargo +nightly-2022-04-05 checkCompiling libc v0.2.139
error[E0658]: `const extern fn` definitions are unstable
--> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/macros.rs:188:17
|
188 | / pub $($constness)* unsafe extern fn $i($($arg: $argty),*
189 | | ) -> $ret {
190 | | $($body);*
191 | | }
| |_________________^
|
::: ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/unix/linux_like/mod.rs:1501:1
|
1501 | / f! {
1502 | | pub fn CMSG_FIRSTHDR(mhdr: *const msghdr) -> *mut cmsghdr {
1503 | | if (*mhdr).msg_controllen as usize >= ::mem::size_of::<cmsghdr>() {
1504 | | (*mhdr).msg_control as *mut cmsghdr
... |
1547 | | }
1548 | | }
| |_- in this macro invocation
|
= note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
= help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
= note: this error originates in the macro `f` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0658]: `const extern fn` definitions are unstable
--> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/macros.rs:203:17
|
203 | / pub $($constness)* extern fn $i($($arg: $argty),*
204 | | ) -> $ret {
205 | | $($body);*
206 | | }
| |_________________^
|
::: ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/unix/linux_like/mod.rs:1550:1
|
1550 | / safe_f! {
1551 | | pub fn SIGRTMAX() -> ::c_int {
1552 | | unsafe { __libc_current_sigrtmax() }
1553 | | }
... |
1625 | | }
1626 | | }
| |_- in this macro invocation
|
= note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
= help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
= note: this error originates in the macro `safe_f` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0658]: `const extern fn` definitions are unstable
--> ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/macros.rs:203:17
|
203 | / pub $($constness)* extern fn $i($($arg: $argty),*
204 | | ) -> $ret {
205 | | $($body);*
206 | | }
| |_________________^
|
::: ~/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.139/src/unix/linux_like/linux/mod.rs:3720:1
|
3720 | / safe_f! {
3721 | | pub {const} fn makedev(major: ::c_uint, minor: ::c_uint) -> ::dev_t {
3722 | | let major = major as ::dev_t;
3723 | | let minor = minor as ::dev_t;
... |
3730 | | }
3731 | | }
| |_- in this macro invocation
|
= note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
= help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
= note: this error originates in the macro `safe_f` (in Nightly builds, run with -Z macro-backtrace for more info)