Oops, missed a part of the previous change.

diff --git a/configure.ac b/configure.ac
index 7f2e272c59245d5c36552e2ba49e7b542e01ffc3..9e93013f3967b26be606c603ae31fa6c976bf319 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -303,6 +303,17 @@ case "${host}" in
 
 esac
 
+if test "x$OPENAL_OK" != "xyes"; then
+    echo
+    echo "You *must* have the openal library installed on your system to build"
+    echo "SimGear!"
+    echo
+    echo "Please see README.OpenAL for more details."
+    echo
+    echo "configure aborted."
+    exit
+fi
+
 openal_LIBS="$LIBS"
 LIBS="$base_LIBS"