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-rw-r--r--src/ext/README7
-rw-r--r--src/mainpage.md3
2 files changed, 9 insertions, 1 deletions
diff --git a/src/ext/README b/src/ext/README
index d7e5439c71..a5ed747ad7 100644
--- a/src/ext/README
+++ b/src/ext/README
@@ -1,3 +1,10 @@
+This directory holds code that was written elsewhere, and is not
+reliably packaged as a library where we want to build, so we ship
+it along with Tor.
+
+In general, you should not edit this code: we are not the maintainers.
+Instead, you should submit patches upstream.
+
OpenBSD_malloc_Linux.c:
diff --git a/src/mainpage.md b/src/mainpage.md
index 2c4c494354..260e193f1c 100644
--- a/src/mainpage.md
+++ b/src/mainpage.md
@@ -84,7 +84,8 @@ The codebase is divided into a few top-level subdirectories, each of
which contains several sub-modules.
- `ext` -- Code maintained elsewhere that we include in the Tor
- source distribution.
+ source distribution. You should not edit this code if you can
+ avoid it: we try to keep it identical to the upstream versions.
- \refdir{lib} -- Lower-level utility code, not necessarily
tor-specific.