sed problem in latest CVS autoconf

[Nicolas Joly]

Hi,

I just tested CVS autoconf on my Tru64 Unix v5.0a workstation and found
a small sed problem with `?' metacharacter. Most sed implementations rely
on BRE regexp that do not support `?', but GNU sed does allow its use.

in tests/mktests.sh:
[...]
# Get the list of macros which are defined in Autoconf level.
# Get rid of the macros we are not interested in.
cat $src |
  sed -ne 's/^A[CU]_DEFUN\(_ONCE\)\?(\[*\([a-zA-Z0-9_]*\).*$/\2/p' |
  sort |
  uniq |
  egrep -v "$syntax_exclude_egrep" >acdefuns
[...]


address@hidden [~]> uname -a
OSF1 medusa.sis.pasteur.fr V5.0 1094 alpha
address@hidden [~]> echo "foobar" | sed 's/foo\(t\)\?bar/XXX/'
foobar
address@hidden [~]> echo "footbar" | sed 's/foo\(t\)\?bar/XXX/'
footbar
address@hidden [~]> echo "footbar" | sed 's/foo\(t\)bar/XXX/' 
XXX

address@hidden [~]> uname -a
Linux xian 2.0.36 #2 Sun Feb 21 15:55:27 EST 1999 i686 unknown
address@hidden [~]> echo "foobar" | sed 's/foo\(t\)\?bar/XXX/'
XXX
address@hidden [~]> echo "footbar" | sed 's/foo\(t\)\?bar/XXX/'
XXX
address@hidden [~]> echo "footbar" | sed 's/foo\(t\)bar/XXX/' 
XXX




-- 
Nicolas Joly

Informatique Scientifique
Institut Pasteur, Paris.