Some versions of kFreeBSD (like 9.0) declare link_addr in a header
but lack an implementation. This makes ./configure pass but breaks
compilation later with a
undefined reference to `link_addr'
Althought that's a bug in the OS header we can detect it easily by also
trying to link.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=715320
---
configure.ac | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/configure.ac b/configure.ac
index b5af0d3..4e8b9b8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2391,13 +2391,15 @@ AC_CHECK_MEMBERS([struct ifreq.ifr_newname,
[#include <sys/socket.h>
#include <net/if.h>
])
+
# Check for BSD approach for setting MAC addr
-AC_CHECK_DECLS([link_addr],
- [], [],
- [#include <sys/types.h>
- #include <sys/socket.h>
- #include <net/if_dl.h>
- ])
+AC_TRY_LINK([#include <sys/types.h>
+ #include <sys/socket.h>
+ #include <net/if_dl.h>],
+ [link_addr(NULL, NULL)],
+ [AC_DEFINE([HAVE_DECL_LINK_ADDR],
+ [1],
+ [whether link_addr is available])])
# Check for BSD approach for bridge management
AC_CHECK_DECLS([BRDGSFD, BRDGADD, BRDGDEL],
--
1.8.3.2
--
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