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multimedia/libmp4v2 build failure


On -current with gcc 8.4.0 this package fails build with:

--- util.lo ---
if /bin/sh ../../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H
-I. -I. -I../.. -I../../include -I../../lib/utils  -I/usr/pkg/include
-I/usr/X11R7/include -I/usr/X11R7/include/libdrm -I/usr/include
-DDEBUG -Wall -Werror -O2 -I/usr/pkg/include -I/usr/X11R7/include
-I/usr/X11R7/include/libdrm -I/usr/include -DMPEG4IP
util.lo -MD -MP -MF ".deps/util.Tpo" -c -o util.lo util.c;  then mv -f
".deps/util.Tpo" ".deps/util.Plo"; else rm -f ".deps/util.Tpo"; exit
1; fi
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../.. -I../../include
-DDEBUG -Wall -Werror -O2 -DMPEG4IP
.deps/util.Tpo -c util.c  -fPIC -DPIC -o .libs/util.o
--- net_udp.lo ---
In function 'udp_host_addr4',
    inlined from 'udp_host_addr' at net_udp.c:1085:10:
net_udp.c:531:2: error: 'strncpy' specified bound 256 equals
destination size [-Werror=stringop-truncation]
  strncpy(hname, inet_ntoa(iaddr), MAXHOSTNAMELEN);
net_udp.c: In function 'udp_set_multicast_src':
net_udp.c:1115:10: error: 'strncpy' specified bound 256 equals
destination size [-Werror=stringop-truncation]
          strncpy(G_Multicast_Src, src, sizeof(G_Multicast_Src));
cc1: all warnings being treated as errors


I 'solved' it for the moment with

--- net_udp.c.orig      2007-09-18 21:52:01.000000000 +0100
+++ net_udp.c   2020-08-30 20:03:10.019414145 +0100
@@ -163,9 +163,8 @@
        rtp_message(LOG_ALERT, "ERROR: %s, (%d - %s)\n", buffer, e,
-       uint32_t retlen;
        va_start(ap, msg);
-       retlen = vsnprintf(buffer, blen, msg, ap);
+       (void)vsnprintf(buffer, blen, msg, ap);
        rtp_message(LOG_ALERT, "%s:%s", buffer, strerror(errno));
@@ -529,7 +528,10 @@
        ASSERT(hent->h_addrtype == AF_INET);
        memcpy(&iaddr.s_addr, hent->h_addr, sizeof(iaddr.s_addr));
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-truncation"
        strncpy(hname, inet_ntoa(iaddr), MAXHOSTNAMELEN);
+#pragma GCC diagnostic pop
        return xstrdup(hname);

@@ -1113,7 +1115,10 @@
      //TODO - In future use a list and add more that one src
      if(src !=         NULL) {
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-truncation"
          strncpy(G_Multicast_Src, src, sizeof(G_Multicast_Src));
+#pragma GCC diagnostic pop
          G_IGMP_V3 = 1;

(the first modification is actually from an existing patch to the
file, I only added the pragmas, but as far as I understand it strncpy
should be replaced).



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