autogen.sh: Write a comment about need for autoheader

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/autogen.sh b/autogen.sh
index dddafaca8f72de31a21969dd510fd52942afa824..0459fdafddf20659a86efcd8c05366f65a5c4f3d 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -20,3 +20,7 @@
 set -e
 autoconf
 autoheader
+# ^ although configure will run autoheader if we didn't, our
+#   objective is for users not to have to have recent autoconf
+#   installed, so we commit config.h.  ./autogen.sh regenerates
+#   the committed files.
\ No newline at end of file