[src/trunk]: src/usr.bin/config config(1): TODO about namespace (esp. options...

[uebayasi <uebayasi%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/62714a6aafac
branches:  trunk
changeset: 803914:62714a6aafac
user:      uebayasi <uebayasi%NetBSD.org@localhost>
date:      Sun Nov 16 07:12:34 2014 +0000

description:
config(1): TODO about namespace (esp. options vs. module)

diffstat:

 usr.bin/config/TODO |  15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diffs (22 lines):

diff -r 17320690da03 -r 62714a6aafac usr.bin/config/TODO
--- a/usr.bin/config/TODO       Sun Nov 16 07:08:08 2014 +0000
+++ b/usr.bin/config/TODO       Sun Nov 16 07:12:34 2014 +0000
@@ -247,3 +247,18 @@
   Don't build a whole kernel only to specify root/swap devices.
 
   Make these parameter re-configurable afterwards.
+
+o Namespace.
+
+  Investigate namespace of attributes/modules/options.  Figure out the hidden
+  design about these, document it, then re-design it.
+
+  At this moment, all of them share the single "selecttab", which means their
+  namespaces are common, but they also have respective tables (attrtab,
+  opttab, etc.).
+
+  Selecting an option (addoption()), that is also a module name, works only if
+  the module doesn't depend on anything, because addoption() doesn't select
+  module and its dependencies (selectattr()).  In other words, an option is
+  only safely converted to a module (define), only if it doesn't depend on
+  anything.  (One example is DDB.)