[PATCH 0/5] more aggressive on ${a:-b}

[Eric Blake]

I'm pushing the first four patches now.  I will wait on the fifth one
for a couple of days for any feedback.

On cygwin, attempts to do a glob() with a filename that contains
a backslash can issue a warning; but I have been unable to reliably
reproduce that in my environment (otherwise, I would have used it
as an example in the second patch).  But see these links for an
example of where unintended globbing matters:
http://cygwin.com/ml/cygwin/2009-04/msg00531.html
https://alioth.debian.org/tracker/?group_id=100114&atid=413095&func=detail&aid=311614

Eric Blake (5):
  m4sh: fix some namespace safety issues
  docs: mention cost of globbing during variable expansion
  tests: improve some shell assumption testing
  m4sh: reduce size of AS_VAR_TEST_SET
  m4sh: assume ${a:-b} support

 ChangeLog                 |   49 +++++++++++++++++++++++++
 bin/autoconf.as           |    2 +-
 doc/autoconf.texi         |   48 +++++++++++++++++++++----
 lib/autoconf/functions.m4 |    2 +-
 lib/autoconf/general.m4   |    2 +-
 lib/autoconf/status.m4    |    2 +-
 lib/autotest/general.m4   |    2 +-
 lib/m4sugar/m4sh.m4       |   36 ++++++++++++-------
 tests/autotest.at         |    2 +-
 tests/c.at                |    4 +-
 tests/foreign.at          |    2 +-
 tests/fortran.at          |   28 +++++++-------
 tests/m4sh.at             |   89 ++++++++++++++++++++++++++++++++++++++++++---
 tests/tools.at            |    2 +-
 tests/torture.at          |    2 +-
 15 files changed, 221 insertions(+), 51 deletions(-)

-- 
1.7.2.2