Re: dash bug which is affecting release goal
Ian Jackson <ian@davenant.greenend.org.uk> writes:
> Sergei Golovan writes ("Re: dash bug which is affecting release goal"):
>> Expression ${1+"$@"} means "if $1 exists use "$@", otherwise nothing".
>> It's a workaround for a bug in some old bash version which erroneously
>> converted "$@" in case of empty command line into a single empty
>> argument. I think in new releases it isn't necessary to account for
>> this.
> Ah. I haven't encountered that bug. Was it in any recently released
> version. I don't think we should be worrying about it now, surely ?
The Autoconf manual doesn't mention bash, just some pre-POSIX shells:
`$@'
One of the most famous shell-portability issues is related to
`"$@"'. When there are no positional arguments, POSIX says that
`"$@"' is supposed to be equivalent to nothing, but the original
Unix Version 7 Bourne shell treated it as equivalent to `""'
instead, and this behavior survives in later implementations like
Digital Unix 5.0.
--
Russ Allbery (rra@debian.org) <http://www.eyrie.org/~eagle/>
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