From 0dfd7e3d8cd9f09deb331f59fe024452e89aae83 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Sat, 25 Nov 2023 23:03:29 +0100
Subject: [PATCH] net/SocketDescriptor: SO_PROTOCOL is really Linux-specific

---
 src/net/SocketDescriptor.cxx | 4 ++--
 src/net/SocketDescriptor.hxx | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/net/SocketDescriptor.cxx b/src/net/SocketDescriptor.cxx
index ecf339df4..f90feae8f 100644
--- a/src/net/SocketDescriptor.cxx
+++ b/src/net/SocketDescriptor.cxx
@@ -32,7 +32,7 @@ SocketDescriptor::IsStream() const noexcept
 	return GetType() == SOCK_STREAM;
 }
 
-#ifndef _WIN32
+#ifdef __linux__
 
 int
 SocketDescriptor::GetProtocol() const noexcept
@@ -40,7 +40,7 @@ SocketDescriptor::GetProtocol() const noexcept
 	return GetIntOption(SOL_SOCKET, SO_PROTOCOL, -1);
 }
 
-#endif // !_WIN32
+#endif // __linux__
 
 #ifdef _WIN32
 
diff --git a/src/net/SocketDescriptor.hxx b/src/net/SocketDescriptor.hxx
index a25641c0c..143a88417 100644
--- a/src/net/SocketDescriptor.hxx
+++ b/src/net/SocketDescriptor.hxx
@@ -101,14 +101,14 @@ public:
 	[[gnu::pure]]
 	bool IsStream() const noexcept;
 
-#ifndef _WIN32
+#ifdef __linux__
 	/**
 	 * Determine the socket protocol (SO_PROTOCOL),
 	 * e.g. IPPROTO_SCTP.  Returns -1 on error.
 	 */
 	[[gnu::pure]]
 	int GetProtocol() const noexcept;
-#endif // !_WIN32
+#endif // __linux__
 
 	static constexpr SocketDescriptor Undefined() noexcept {
 #ifdef _WIN32