test GNU_SOURCE and include features.h if present to clear warning about asprintf definition

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@596 f882894a-f735-0410-b71e-b25c423dba1c

configure.in

@@ -21,6 +21,7 @@ dnl Figure out how to invoke "install" and what install options to use.
 AC_PROG_INSTALL
 AC_SUBST(INSTALL)
 
+AC_GNU_SOURCE
 AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_GCC_TRADITIONAL
@@ -31,6 +32,8 @@ AC_MINIX
 AC_PROG_MAKE_SET
 AC_PROG_AWK
 
+
+
 saved_srcdir=$srcdir
 srcdir=$srcdir/lib
 test -f $srcdir/getloadavg.c \
@@ -469,7 +472,7 @@ AC_HEADER_STDC
 AC_HEADER_TIME
 AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS(signal.h strings.h string.h syslog.h uio.h errno.h regex.h sys/types.h sys/time.h sys/socket.h sys/loadavg.h)
-AC_CHECK_HEADERS(stdarg.h sys/unistd.h ctype.h stdlib.h)
+AC_CHECK_HEADERS(features.h stdarg.h sys/unistd.h ctype.h stdlib.h)
 AC_CHECK_HEADERS(limits.h sys/param.h sys/mount.h sys/vfs.h sys/fs/s5param.h sys/filsys.h fcntl.h sys/statfs.h sys/dustat.h sys/statvfs.h)
 
 # Define HAVE_INTTYPES_H if <inttypes.h> exists,

plugins/common.h

@@ -30,12 +30,16 @@
  *
  *****************************************************************************/
 
+#include "config.h"
+
+#ifdef HAVE_FEATURES_H
+#include <features.h>
+#endif
+
 #include <stdio.h>							/* obligatory includes */
 #include <stdlib.h>
 #include <errno.h>
 
-#include "config.h"
-
 #ifdef HAVE_STRINGS_H
 #include <strings.h>
 #endif