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-rw-r--r--docs/FAQ.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/FAQ.rst b/docs/FAQ.rst
index dc97507f05..d0b47d685c 100644
--- a/docs/FAQ.rst
+++ b/docs/FAQ.rst
@@ -42,7 +42,8 @@ for your system. To see these options, run:
Some clang command line options are driver-only options, some are frontend-only
options. Frontend-only options are intended to be used only by developers.
-Users should not run ``clang -cc1`` directly.
+Users should not run ``clang -cc1`` directly, because ``-cc1`` options are not
+guaranteed to be stable.
If you want to use a frontend-only option ("a ``-cc1`` option"), for example
``-ast-dump``, then you need to take the ``clang -cc1`` line generated by the