While comparing ```grep ^language= */config-lang.in```
with the list from the doc I noticed that the last addition rust was missing.
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 9109c172039..1904a0e3c12 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -2051,7 +2051,7 @@ grep ^language= */config-lang.in
Currently, you can use any of the following:
@code{all}, @code{default}, @code{ada}, @code{c}, @code{c++}, @code{d},
@code{fortran}, @code{go}, @code{jit}, @code{lto}, @code{m2},
-@code{objc}, @code{obj-c++}.
+@code{objc}, @code{obj-c++}, @code{rust}.
Building the Ada compiler has special requirements, see below.
If you do not pass this flag, or specify the option @code{default}, then the
default languages available in the @file{gcc} sub-tree will be configured.
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