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Re: [PATCH 0/2] First steps in making autoconf ensure a POSIX shell

From: Stefano Lattarini
Subject: Re: [PATCH 0/2] First steps in making autoconf ensure a POSIX shell
Date: Sat, 10 Nov 2012 10:00:17 +0100

On 11/10/2012 01:45 AM, Eric Blake wrote:
> [SNIP]
> What I'm thinking right now (but don't have the patch ready yet) is that
> we will reinstate a spy that loudly warns if autoconf can't find a POSIX
> shell, with a request for bug reports, and in parallel add a new macro
> (maybe named AS_SHELL_POSIX) that other packages can use to require a
> POSIX shell even with autoconf 2.70.  That is, using the new macro would
> switch autoconf from spying to requiring POSIX, but packages that aren't
> ready to require POSIX can still safely use 2.70, and the spy will help
> us know if anyone is really stuck on a non-museum system where it matters.
This is a good idea.  It might also scale well in case we'll decide to
allow the user to request more POSIX or not-so-POSIX features from the
shell: that could be implemented with a similar macro AS_SHELL_EXTRA
(say), or, for finer control and granularity, by having AS_SHELL_POSIX
take arguments specifying extra suggested or required features:



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