+AC_CHECK_DECLS(environ)
+
+# check if gcc's -fvisibility is supported
+CHECK_VISIBILITY_HIDDEN
+
+enable_chroot=yes
+AC_CHECK_HEADERS([sys/capability.h],,enable_chroot=no)
+AC_CHECK_HEADERS([sys/prctl.h],,enable_chroot=no)
+AC_CHECK_FUNCS([chroot],,enable_chroot=no)
+
+AM_CONDITIONAL(ENABLE_CHROOT, test "x$enable_chroot" = "xyes")
+
+if test "x$enable_chroot" = "xyes" ; then
+ AC_DEFINE([ENABLE_CHROOT], 1, [Enable chroot() usage])
+fi
+
+AC_CHECK_LIB(dl, dlopen, [ AC_CHECK_HEADERS(dlfcn.h, HAVE_DLOPEN=yes, HAVE_DLOPEN=no) ], HAVE_DLOPEN=no)
+if test "x$HAVE_DLOPEN" = "xyes" ; then
+ AC_DEFINE([HAVE_DLOPEN],1,[Have dlopen()])
+fi
+AM_CONDITIONAL(HAVE_DLOPEN, test "x$HAVE_DLOPEN" = "xyes")
+
+have_inotify=no
+AC_CHECK_HEADERS([linux/inotify.h], [have_inotify=yes])
+AC_CHECK_HEADERS([sys/inotify.h], [have_inotify=yes])
+
+AM_CONDITIONAL(HAVE_INOTIFY, test "x$have_inotify" = "xyes")
+
+if test "x$have_inotify" = "xyes" ; then
+ AC_DEFINE([HAVE_INOTIFY], 1, [Enable Linux inotify() usage])
+fi
+
+have_kqueue=yes
+AC_CHECK_FUNCS([kqueue],,have_kqueue=no)
+
+AM_CONDITIONAL(HAVE_KQUEUE, test "x$have_kqueue" = "xyes")
+
+if test "x$have_kqueue" = "xyes" ; then
+ AC_DEFINE([HAVE_KQUEUE], 1, [Enable BSD kqueue() usage])
+fi
+
+AM_GNU_GETTEXT([external])
+
+IT_PROG_INTLTOOL([0.35.0])
+GETTEXT_PACKAGE=avahi
+AC_SUBST([GETTEXT_PACKAGE])
+AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE],["$GETTEXT_PACKAGE"],[Gettext package])
+AM_GLIB_GNU_GETTEXT
+
+avahilocaledir='${prefix}/${DATADIRNAME}/locale'
+AC_SUBST(avahilocaledir)
+
+
+# Check for pkg-config manually first, as if its not installed the
+# PKG_PROG_PKG_CONFIG macro won't be defined.
+AC_CHECK_PROG(have_pkg_config, pkg-config, yes, no)
+
+if test x"$have_pkg_config" = "xno"; then
+ AC_MSG_ERROR(pkg-config is required to install this program)
+fi
+