unix: don't redefine constants already defined in glibc headers
These are all present in glibc 2.37 which is currently used to generate
these constants.
Change-Id: I3ffbd8f8581e85e8854222ad3f2c7f44aac106c7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/552417
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index 12f6d2d..c649202 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -284,10 +284,6 @@
#include <asm/termbits.h>
#endif
-#ifndef MSG_FASTOPEN
-#define MSG_FASTOPEN 0x20000000
-#endif
-
#ifndef PTRACE_GETREGS
#define PTRACE_GETREGS 0xc
#endif
@@ -296,14 +292,6 @@
#define PTRACE_SETREGS 0xd
#endif
-#ifndef SOL_NETLINK
-#define SOL_NETLINK 270
-#endif
-
-#ifndef SOL_SMC
-#define SOL_SMC 286
-#endif
-
#ifdef SOL_BLUETOOTH
// SPARC includes this in /usr/include/sparc64-linux-gnu/bits/socket.h
// but it is already in bluetooth_linux.go
@@ -320,11 +308,6 @@
#undef TIPC_WAIT_FOREVER
#define TIPC_WAIT_FOREVER 0xffffffff
-// Copied from linux/l2tp.h
-// Including linux/l2tp.h here causes conflicts between linux/in.h
-// and netinet/in.h included via net/route.h above.
-#define IPPROTO_L2TP 115
-
// Copied from linux/netfilter/nf_nat.h
// Including linux/netfilter/nf_nat.h here causes conflicts between linux/in.h
// and netinet/in.h.
