$NetBSD: patch-lib_usrp_mpmd_mpmd__link__if__ctrl__udp.cpp,v 1.4 2023/12/18 22:44:41 mef Exp $

work around namespace pollution in NetBSD-9's <net/if.h> before 1.282

--- host/lib/usrp/mpmd/mpmd_link_if_ctrl_udp.cpp.orig	2023-11-14 00:22:00.000000000 +0900
+++ lib/usrp/mpmd/mpmd_link_if_ctrl_udp.cpp	2023-12-19 07:26:31.730670831 +0900
@@ -78,10 +78,10 @@ mpmd_link_if_ctrl_udp::udp_link_info_map
                                           ? std::stoul(link_info.at("link_rate"))
                                           : MAX_RATE_1GIGE;
         const std::string link_type = link_info.at("type");
-        const size_t if_mtu         = std::stoul(link_info.at("mtu"));
+        const size_t if_mtu_         = std::stoul(link_info.at("mtu"));
         result.emplace(link_info.at("ipv4"),
             mpmd_link_if_ctrl_udp::udp_link_info_t{
-                udp_port, link_rate, link_type, if_mtu});
+                udp_port, link_rate, link_type, if_mtu_});
     }
 
     return result;
@@ -317,8 +317,8 @@ mpmd_link_if_ctrl_udp::mpmd_link_if_ctrl
             if (info.link_type == "internal") {
                 UHD_LOG_TRACE("MPMD::XPORT::UDP",
                     "MTU for internal interface " << ip_addr << " is "
-                                                  << std::to_string(info.if_mtu));
-                _mtu = std::min(_mtu, info.if_mtu);
+                                                  << std::to_string(info.if_mtu_));
+                _mtu = std::min(_mtu, info.if_mtu_);
             } else {
                 _mtu = std::min(_mtu,
                     discover_mtu_for_ip(ip_addr,