clarify self-hosting instructions
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4897 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/README_DEVELOPERS b/README_DEVELOPERS
index 60ee523..3724151 100644
--- a/README_DEVELOPERS
+++ b/README_DEVELOPERS
@@ -70,6 +70,10 @@
--tool=cachegrind -v inner/.../bin/valgrind --tool=none -v prog
It's fragile, confusing and slow, but it does work well enough for
-you to get some useful performance data. At the time of writing
-the allocator is not annotated with client requests so Memcheck is
-not as useful as it could be.
+you to get some useful performance data. The inner Valgrind has most of
+its output (ie. those lines beginning with "==<pid>==") prefixed with a
+'>', which helps a lot.
+
+At the time of writing the allocator is not annotated with client requests
+so Memcheck is not as useful as it could be. It also has not been tested
+much, so don't be surprised if you hit problems.