commit 6b0bb665c3cb31ba93fb5ac8197f033532614fd4
from: Alexander Barton <alex@barton.de>
date: Fri Apr 23 08:55:50 2010 UTC

Include netinet/{in.h, in_systm.h} when checking for netinet/ip.h

This solves warning messages of autoconf on e.g. FreeBSD 8:

configure: WARNING: netinet/ip.h: present but cannot be compiled
configure: WARNING: netinet/ip.h:   check for missing prerequisite headers?

commit - 1caa3fb94b6e23d7b63183f6cb6c97ed1821350c
commit + 6b0bb665c3cb31ba93fb5ac8197f033532614fd4
blob - 153ec579f702e184d91c54b22bdc21e14d579c8d
blob + b053c416570f92167e90b43e2fcdb58a565f9c0c
--- configure.in
+++ configure.in
@@ -101,12 +101,19 @@ AC_HEADER_TIME
 AC_HEADER_SYS_WAIT
 
 AC_CHECK_HEADERS([ \
-	ctype.h errno.h fcntl.h netdb.h netinet/in.h stdlib.h string.h \
-	strings.h sys/socket.h sys/time.h unistd.h \
+	ctype.h errno.h fcntl.h netdb.h netinet/in.h netinet/in_systm.h \
+	stdlib.h string.h strings.h sys/socket.h sys/time.h unistd.h \
 	],,AC_MSG_ERROR([required C header missing!]))
 
 AC_CHECK_HEADERS([ \
-	arpa/inet.h ctype.h malloc.h netinet/ip.h stdbool.h stddef.h varargs.h])
+	arpa/inet.h ctype.h malloc.h netinet/ip.h stdbool.h stddef.h varargs.h \
+	],[],[],[[
+	#include <netinet/in.h>
+	#ifdef HAVE_NETINET_IN_SYSTM_H
+		#include <netinet/in_systm.h>
+	#endif
+	]]
+)
 
 # -- Datatypes --