grep language= */config-lang.in
@end smallexample
Currently, you can use any of the following:
-@code{all}, @code{ada}, @code{c}, @code{c++}, @code{f95}, @code{java},
+@code{all}, @code{ada}, @code{c}, @code{c++}, @code{fortran}, @code{java},
@code{objc}, @code{obj-c++}, @code{treelang}.
Building the Ada compiler has special requirements, see below.
If you do not pass this flag, or specify the option @code{all}, then all