diff --git a/libs/numeric/sublibs b/libs/numeric/sublibs
new file mode 100644
index 0000000000..721d7c4a92
--- /dev/null
+++ b/libs/numeric/sublibs
@@ -0,0 +1 @@
+The existance of this file tells the regression reporting programs that the directory contains sub-directories which are libraries.
\ No newline at end of file