build: explain empty lib/Makefile.am

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 9ce06a81ea45b2883a6faf07a0d2136bb2a4e647..8562633c2fdf06b0203cc6c1a40f9a76401ae45a 100644 (file)
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -1 +1,3 @@
-# dummy
+# Files in the lib/ subdirectory are picked up as needed by the flex
+# build system. As such, we don't need to specify anything beyond
+# having a Makefile.am for automake to generate a Makefile.in from.