Check for getifaddrs() in libc before ifaddrs.h

Reported by: Andrej Kralj

He found a platform where the header exists but the library code doesn't.

diff --git a/configure.ac b/configure.ac
index 98d4cf0..a37a404 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -153,7 +153,10 @@ AC_SEARCH_LIBS(hstrerror, [resolv], [],
 AC_CHECK_HEADERS(sys/filio.h)
 
 # This is the modern way.  Older systems use the ioctl method.
-AC_CHECK_HEADERS(ifaddrs.h)
+AC_SEARCH_LIBS(getifaddrs, [c],
+  [AC_CHECK_HEADERS(ifaddrs.h)])
+
+
 
 # Some OSes (Solaris) need sys/sockio.h for SIOCGIFADDR
 AC_CHECK_HEADERS(sys/sockio.h)