warnings: add comments about previous patch
authorEric Blake <eblake@redhat.com>
Tue, 26 Jul 2011 21:55:05 +0000 (15:55 -0600)
committerEric Blake <eblake@redhat.com>
Tue, 26 Jul 2011 21:55:05 +0000 (15:55 -0600)
commit41a7841a82351f9df3e13b6199a134004d694131
treec5aae7d381cc2f38b53084476c20f349291eb398
parent336406c13cc08ee13d6a15cc8cf86efb9132a830
warnings: add comments about previous patch

* m4/absolute-header.m4: Document AS_VAR_PUSHDEF limitation.
* m4/include_next.m4: Likewise.
* m4/warn-on-use.m4: Likewise.
* m4/warnings.m4: Likewise, and simplify use.
Suggested by Stefano Lattarini.

Signed-off-by: Eric Blake <eblake@redhat.com>
ChangeLog
m4/absolute-header.m4
m4/include_next.m4
m4/warn-on-use.m4
m4/warnings.m4