error: extern declarations without an explicit ABI are deprecated
    --> src/macros.rs:260:36
     |
260  |                   pub $($constness)* extern fn $i($($arg: $argty),*) -> $ret
     |                                      ^^^^^^ help: explicitly specify the C ABI: `extern "C"`
     |
    ::: src/unix/bsd/freebsdlike/freebsd/mod.rs:4962:1
     |
4962 | / safe_f! {
4963 | |     pub {const} fn WIFSIGNALED(status: c_int) -> bool {
4964 | |         (status & 0o177) != 0o177 && (status & 0o177) != 0 && status != 0x13
...    |
5006 | | }
     | |_- in this macro invocation
     |
     = note: this error originates in the macro `safe_f` (in Nightly builds, run with -Z macro-backtrace for more info)

error: extern declarations without an explicit ABI are deprecated
   --> src/macros.rs:260:36
    |
260 |                   pub $($constness)* extern fn $i($($arg: $argty),*) -> $ret
    |                                      ^^^^^^ help: explicitly specify the C ABI: `extern "C"`
    |
   ::: src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs:510:1
    |
510 | / safe_f! {
511 | |     pub {const} fn makedev(major: c_uint, minor: c_uint) -> crate::dev_t {
512 | |         let major = major as crate::dev_t;
513 | |         let minor = minor as crate::dev_t;
...   |
521 | | }
    | |_- in this macro invocation
    |
    = note: this error originates in the macro `safe_f` (in Nightly builds, run with -Z macro-backtrace for more info)

error: extern declarations without an explicit ABI are deprecated
   --> src/macros.rs:246:43
    |
246 |                   pub $($constness)* unsafe extern fn $i($($arg: $argty),*) -> $ret
    |                                             ^^^^^^ help: explicitly specify the C ABI: `extern "C"`
    |
   ::: src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs:523:1
    |
523 | / f! {
524 | |     pub fn major(dev: crate::dev_t) -> c_int {
525 | |         (((dev >> 32) & 0xffffff00) | ((dev >> 8) & 0xff)) as c_int
...   |
531 | | }
    | |_- in this macro invocation
    |
    = note: this error originates in the macro `f` (in Nightly builds, run with -Z macro-backtrace for more info)

error: could not compile `libc` (lib) due to 8 previous errors
warning: build failed, waiting for other jobs to finish...

Exit status: 101