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[sr #110431] AC_INIT should accept shell variable expansion in its argum

From: Zack Weinberg
Subject: [sr #110431] AC_INIT should accept shell variable expansion in its arguments
Date: Sat, 23 Jan 2021 15:02:34 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux aarch64; rv:84.0) Gecko/20100101 Firefox/84.0


                 Summary: AC_INIT should accept shell variable expansion in
its arguments
                 Project: Autoconf
            Submitted by: zackw
            Submitted on: Sat 23 Jan 2021 08:02:32 PM UTC
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
        Operating System: None



Currently, none of the arguments to AC_INIT can be computed when you run
'configure'.  If you use two-argument AM_INIT_AUTOMAKE, on the other hand, you
_can_ pass shell variables as the arguments.  The Automake manual calls this
out as a reason to continue using two-argument AM_INIT_AUTOMAKE:

> differently from what happens for AC_INIT invocations, this AM_INIT_AUTOMAKE
invocation supports shell variables’ expansions in the PACKAGE and VERSION
arguments (which otherwise defaults, respectively, to the PACKAGE_TARNAME and
PACKAGE_VERSION defined via the AC_INIT invocation; see The AC_INIT macro in
The Autoconf Manual); and this can still be useful in some selected
situations. Our hope is that future Autoconf versions will improve their
support for package versions defined dynamically at configure runtime; when
(and if) this happens, support for the two-args AM_INIT_AUTOMAKE invocation
will likely be removed from Automake.

So we should find a way to support shell variable expansion in the arguments


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