[RFC PATCH 0/3] Work around autoconf/automake warnings skew (automake side)

This patch set completes the work necessary on automake’s side to bring
ChannelDefs.pm back into sync between automake and autoconf.  It also
updates the documentation of warnings options and arranges to suppress
warnings from autom4te --trace in a cleaner fashion.

See <https://lists.gnu.org/archive/html/autoconf-patches/2020-09/msg00008.html>
for the rationale for merge_WARNINGS, which is not used in automake, but will
be in autoconf.

Zack Weinberg (3):
  New utility function Automake::ChannelDefs::merge_WARNINGS.
  Use WARNINGS=none to suppress warnings from autom4te runs.
  Update documentation of warnings options and strictness levels.

 bin/aclocal.in              |  19 ++-
 bin/automake.in             |   7 +-
 doc/automake.texi           | 250 +++++++++++++++++++-----------------
 lib/Automake/ChannelDefs.pm |  67 +++++++++-
 4 files changed, 208 insertions(+), 135 deletions(-)

-- 
2.28.0