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@@ -36905,7 +36905,8 @@ details.
@item --with-system-readline
Use the readline library installed on the host, rather than the
-library supplied as part of @value{GDBN}.
+library supplied as part of @value{GDBN}. Readline 7 or newer is
+required; this is enforced by the build system.
@item --with-system-zlib
Use the zlib library installed on the host, rather than the library