NetBSD: Remove BPF constants

These are currently incorrect, so remove them for now. If desired, they
can be added back in the future using the `_IO*` functions.

(backport <#4782>)
(cherry picked from commit 7de84bf)

Author: tgross35

libc-test/semver/netbsd.txt

@@ -103,23 +103,6 @@ B460800
 B7200
 B76800
 B921600
-BIOCFLUSH
-BIOCGBLEN
-BIOCGDLT
-BIOCGETIF
-BIOCGHDRCMPLT
-BIOCGRSIG
-BIOCGSEESENT
-BIOCGSTATS
-BIOCIMMEDIATE
-BIOCPROMISC
-BIOCSBLEN
-BIOCSDLT
-BIOCSETIF
-BIOCSHDRCMPLT
-BIOCSRSIG
-BIOCSSEESENT
-BIOCVERSION
 BOOT_TIME
 BUFSIZ
 BUS_ADRALN
@@ -990,7 +973,6 @@ SIGINFO
 SIGIO
 SIGNATURE
 SIGSTKSZ
-SIOCGIFADDR
 SOCKCREDSIZE
 SOCK_CLOEXEC
 SOCK_CONN_DGRAM

src/unix/bsd/mod.rs

@@ -398,19 +398,24 @@ pub const POLLWRNORM: c_short = 0x004;
 pub const POLLRDBAND: c_short = 0x080;
 pub const POLLWRBAND: c_short = 0x100;
 
-pub const BIOCGBLEN: c_ulong = 0x40044266;
-pub const BIOCSBLEN: c_ulong = 0xc0044266;
-pub const BIOCFLUSH: c_uint = 0x20004268;
-pub const BIOCPROMISC: c_uint = 0x20004269;
-pub const BIOCGDLT: c_ulong = 0x4004426a;
-pub const BIOCGETIF: c_ulong = 0x4020426b;
-pub const BIOCSETIF: c_ulong = 0x8020426c;
-pub const BIOCGSTATS: c_ulong = 0x4008426f;
-pub const BIOCIMMEDIATE: c_ulong = 0x80044270;
-pub const BIOCVERSION: c_ulong = 0x40044271;
-pub const BIOCGHDRCMPLT: c_ulong = 0x40044274;
-pub const BIOCSHDRCMPLT: c_ulong = 0x80044275;
-pub const SIOCGIFADDR: c_ulong = 0xc0206921;
+cfg_if! {
+    // Not yet implemented on NetBSD
+    if #[cfg(not(any(target_os = "netbsd")))] {
+        pub const BIOCGBLEN: c_ulong = 0x40044266;
+        pub const BIOCSBLEN: c_ulong = 0xc0044266;
+        pub const BIOCFLUSH: c_uint = 0x20004268;
+        pub const BIOCPROMISC: c_uint = 0x20004269;
+        pub const BIOCGDLT: c_ulong = 0x4004426a;
+        pub const BIOCGETIF: c_ulong = 0x4020426b;
+        pub const BIOCSETIF: c_ulong = 0x8020426c;
+        pub const BIOCGSTATS: c_ulong = 0x4008426f;
+        pub const BIOCIMMEDIATE: c_ulong = 0x80044270;
+        pub const BIOCVERSION: c_ulong = 0x40044271;
+        pub const BIOCGHDRCMPLT: c_ulong = 0x40044274;
+        pub const BIOCSHDRCMPLT: c_ulong = 0x80044275;
+        pub const SIOCGIFADDR: c_ulong = 0xc0206921;
+    }
+}
 
 pub const REG_BASIC: c_int = 0o0000;
 pub const REG_EXTENDED: c_int = 0o0001;

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -1403,12 +1403,6 @@ pub const FD_SETSIZE: usize = 0x100;
 
 pub const ST_NOSUID: c_ulong = 8;
 
-pub const BIOCGRSIG: c_ulong = 0x40044272;
-pub const BIOCSRSIG: c_ulong = 0x80044273;
-pub const BIOCSDLT: c_ulong = 0x80044278;
-pub const BIOCGSEESENT: c_ulong = 0x40044276;
-pub const BIOCSSEESENT: c_ulong = 0x80044277;
-
 // <sys/fstypes.h>
 pub const MNT_UNION: c_int = 0x00000020;
 pub const MNT_NOCOREDUMP: c_int = 0x00008000;