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diff --git a/ld/ld.texinfo b/ld/ld.texinfo
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--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -2403,6 +2403,24 @@ string identifying the original linked file does not change.
Passing @code{none} for @var{style} disables the setting from any
@code{--build-id} options earlier on the command line.
+
+@kindex --warn-poison-system-directories
+@item --warn-poison-system-directories
+Warn for @option{-L} options using system directories such as
+@file{/usr/lib} when cross linking. This option is intended for use
+in environments that want to detect and reject incorrect link settings.
+
+@kindex --no-warn-poison-system-directories
+@item --no-warn-poison-system-directories
+Do not warn for @option{-L} options using system directories such as
+@file{/usr/lib} when cross linking. This option is intended for use
+in chroot environments when such directories contain the correct
+libraries for the target system rather than the host.
+
+@kindex --error-poison-system-directories
+@item --error-poison-system-directories
+Give an error instead of a warning for @option{-L} options using
+system directories when cross linking.
@end table
@c man end