bdr: Document contribs required for test runs

diff --git a/README.developers b/README.developers
index 8778e394b499cc9bd9e34d1a1e83548e3e4ab33d..29b1a48812822208132b06aabafc2df2a40c25aa 100644 (file)
--- a/README.developers
+++ b/README.developers
@@ -10,6 +10,9 @@ Before tagging a release:
 
 * run "make check"
 
+  Note that you need contrib/{btree_gist,cube,hstore,pg_trgm} installed to run
+  tests.
+
 * Ensure that the version in bdr_version.h.in matches the intended tag
 
 * Ensure that bdr--[ver].sql matches the version in bdr_version.h.in