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[sr #110324] autoupdate does some nonsensical changes

From: Bruno Haible
Subject: [sr #110324] autoupdate does some nonsensical changes
Date: Sun, 4 Oct 2020 18:34:07 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0


                 Summary: autoupdate does some nonsensical changes
                 Project: Autoconf
            Submitted by: haible
            Submitted on: Mon 05 Oct 2020 12:34:05 AM CEST
                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



In https://lists.gnu.org/archive/html/bug-gnulib/2020-09/msg00158.html Zack
Weinberg wrote:
"The diff produced by autoupdate is mostly not usable as is.   In fact, it
looks to me more like a todo list for bugs and missing features in autoupdate
itself :-/"

Here is another example, from GNU gperf. Find the input and the changes by
autoupdate 2.69c attached.

1) Changing AC_PREREQ([2.64]) to AC_PREREQ([2.69c]) — or, once 2.70 is
released, to AC_PREREQ([2.70]) — is unwelcome, because many distros which
run autoreconf will not have autoconf 2.70 is installed.
While it is certainly OK to change AC_PREREQ([2.13]) to AC_PREREQ([2.64]) or
so, AC_PREREQ([2.69c]) is a too strong requirement.

2) Changing AC_LANG_SAVE() to m4_warn(...) is nonsense.

3) Leaving AC_LANG_SAVE in the output is not good, because autoupdate is meant
to eliminate this call.

The other parts are helpful, though.


File Attachments:

Date: Mon 05 Oct 2020 12:34:06 AM CEST  Name: configure.ac.diff  Size: 1KiB  
By: haible

Date: Mon 05 Oct 2020 12:34:05 AM CEST  Name: configure.ac  Size: 2KiB   By:



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