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Re: M4sh tests 77 and 78 vs /bin/sh -> dash

From: Zack Weinberg
Subject: Re: M4sh tests 77 and 78 vs /bin/sh -> dash
Date: Fri, 13 Mar 2020 11:54:51 -0400

On Fri, Mar 13, 2020 at 11:31 AM Zack Weinberg <address@hidden> wrote:
> FYI, I grepped the whole autoconf source tree and I didn't find any
> other uses of $as_echo.  However, there is one use in
> libtool/tests/ and one use in
> autoconf-archive/m4/ax_pthread.m4.  I'm going to send patches to both
> of those projects, but the use in ax_pthread.m4 makes me think we
> might need to provide $as_echo and $as_echo_n for backward
> compatibility; people copy stuff out of the autoconf archive and then
> don't ever look for updates.

... and there's a use in gnulib-common.m4, and at least a couple of
dozen uses directly in various's according to*%2F%28%3F%3Aconfigure%5C.%28%3F%3Aac%7Cin%29%7C%5B%5E%2F%5D%2B%5C.m4%29%24+-path%3A.*%2Fax_pthread%5C.m4%24+-path%3A.*%2Fgnulib-common%5C.m4%24&literal=0

so yeah I think we do need some backward compatibility here and maybe
a deprecation warning if we can swing it.


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