+dnl find sizes & alignments
+orig_CPPFLAGS=$CPPFLAGS
+CPPFLAGS="$CPPFLAGS $DBUS_CFLAGS"
+DBIND_CHECK_ALIGNOF(char)
+DBIND_CHECK_ALIGNOF(dbus_bool_t)
+DBIND_CHECK_ALIGNOF(dbus_int16_t)
+DBIND_CHECK_ALIGNOF(dbus_int32_t)
+DBIND_CHECK_ALIGNOF(dbus_int64_t)
+DBIND_CHECK_ALIGNOF(double)
+DBIND_CHECK_ALIGNOF(dbind_pointer)
+DBIND_CHECK_ALIGNOF(dbind_struct)
+CPPFLAGS=$orig_CPPFLAGS
+
+if test "x$GCC" = xyes; then
+ CFLAGS="$CFLAGS -Werror-implicit-function-declaration"
+fi
+
+if test "x$enable_p2p" = "xno"; then
+ P2P_CFLAGS=-DDISABLE_P2P
+fi
+
+AC_SUBST(P2P_CFLAGS)
+