display an explicit warning when netlink headers are missing

"netlink headers not found" implicitely means we have to install the kernel headers. Make this explicit. Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

display an explicit warning when netlink headers are missing
c8c9ce7a · Daniel Lezcano · 1ac470c0 · c8c9ce7a
Commit c8c9ce7a authored Jul 24, 2009 by Daniel Lezcano
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configure.ac configure.ac +1 -1

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--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ AS_AC_EXPAND(LOCALSTATEDIR, $localstatedir)
 AS_AC_EXPAND(LXCPATH, "${localstatedir}/lib/lxc")
 AS_AC_EXPAND(LXC_GENERATE_DATE, "$(date)")

-AC_CHECK_HEADERS([linux/netlink.h linux/genetlink.h], [], AC_MSG_ERROR([netlink headers not found]),
+AC_CHECK_HEADERS([linux/netlink.h linux/genetlink.h], [], AC_MSG_ERROR([netlink headers not found. Please install the linux kernel headers.]),
 [#include <linux/types.h>
 #include <bits/sockaddr.h>
 #include <linux/socket.h>])