Auto merge of #2217 - devnexen:fbsd_timingsafe_api, r=JohnTitor

freebsd introducing timingsafe api (from 12)

Author: bors

src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs

@@ -229,6 +229,8 @@ extern "C" {
     pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
     pub fn elf_aux_info(aux: ::c_int, buf: *mut ::c_void, buflen: ::c_int) -> ::c_int;
     pub fn setproctitle_fast(fmt: *const ::c_char, ...);
+    pub fn timingsafe_bcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn timingsafe_memcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
 }
 
 cfg_if! {

src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs

@@ -234,6 +234,8 @@ extern "C" {
     pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;
     pub fn elf_aux_info(aux: ::c_int, buf: *mut ::c_void, buflen: ::c_int) -> ::c_int;
     pub fn setproctitle_fast(fmt: *const ::c_char, ...);
+    pub fn timingsafe_bcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn timingsafe_memcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
 }
 
 cfg_if! {