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-rw-r--r--gcc/doc/fragments.texi10
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/doc/fragments.texi b/gcc/doc/fragments.texi
index d68be7ad0ed..6aef5537f43 100644
--- a/gcc/doc/fragments.texi
+++ b/gcc/doc/fragments.texi
@@ -160,10 +160,12 @@ A reuse rule is comprised of two parts connected by equality sign. The left
part is the option set used to build multilib and the right part is the option
set that will reuse this multilib. Both parts should only use options
specified in @code{MULTILIB_OPTIONS} and the equality signs found in options
-name should be replaced with periods. The order of options in the left part
-matters and should be same with those specified in @code{MULTILIB_REQUIRED} or
-aligned with the order in @code{MULTILIB_OPTIONS}. There is no such limitation
-for options in the right part as we don't build multilib from them.
+name should be replaced with periods. An explicit period in the rule can be
+escaped by preceding it with a backslash. The order of options in the left
+part matters and should be same with those specified in
+@code{MULTILIB_REQUIRED} or aligned with the order in @code{MULTILIB_OPTIONS}.
+There is no such limitation for options in the right part as we don't build
+multilib from them.
@code{MULTILIB_REUSE} is different from @code{MULTILIB_MATCHES} in that it
sets up relations between two option sets rather than two options. Here is an