[PATCH 1/2] Use stub for virNetDevGetName on mingw

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If if_indextoname is not defined, the whole function using it should
not be defined either.  Add stub to fix build on mingw.

Caused by 5dd607059d8a98e04024305ae4afbd038aadbdcd

Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
---
 configure.ac         |  7 ++++---
 src/util/virnetdev.c | 10 ++++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index cf50422d5dab..08051d53aa0a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -319,9 +319,10 @@ AC_CHECK_SIZEOF([long])
 dnl Availability of various common functions (non-fatal if missing),
 dnl and various less common threadsafe functions
 AC_CHECK_FUNCS_ONCE([cfmakeraw fallocate geteuid getgid getgrnam_r \
-  getmntent_r getpwuid_r getrlimit getuid kill mmap newlocale posix_fallocate \
-  posix_memalign prlimit regexec sched_getaffinity setgroups setns \
-  setrlimit symlink sysctlbyname getifaddrs sched_setscheduler unshare])
+  getmntent_r getpwuid_r getrlimit getuid if_indextoname kill mmap \
+  newlocale posix_fallocate posix_memalign prlimit regexec \
+  sched_getaffinity setgroups setns setrlimit symlink sysctlbyname \
+  getifaddrs sched_setscheduler unshare])

 dnl Availability of various common headers (non-fatal if missing).
 AC_CHECK_HEADERS([pwd.h regex.h sys/un.h \
diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 47e2b20d56a1..170e34827f12 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -852,6 +852,7 @@ virNetDevGetRcvAllMulti(const char *ifname,
     return virNetDevGetIFFlag(ifname, VIR_IFF_ALLMULTI, receive);
 }

+#if defined(HAVE_IF_INDEXTONAME)
 char *virNetDevGetName(int ifindex)
 {
     char name[IFNAMSIZ];
@@ -871,6 +872,15 @@ char *virNetDevGetName(int ifindex)
  cleanup:
      return ifname;
 }
+#else
+char *virNetDevGetName(int ifindex)
+{
+    virReportSystemError(ENOSYS,
+                         _("Cannot get interface name for index '%i'"),
+                         ifindex);
+    return NULL;
+}
+#endif

 /**
  * virNetDevGetIndex:
-- 
2.12.2

--
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