GNU bug report logs - #72267
automake 1.17 issue with new AM_SILENT_RULES

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Package: automake; Reported by: Francis Dupont <Francis.Dupont@HIDDEN>; dated Wed, 24 Jul 2024 07:27:01 UTC; Maintainer for automake is bug-automake@HIDDEN.

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From: Francis Dupont <Francis.Dupont@HIDDEN>
To: Karl Berry <karl@HIDDEN>
Subject: Re: bug#72267: automake 1.17 issue with new AM_SILENT_RULES
In-reply-to: Your message of Fri, 26 Jul 2024 10:48:54 -0600.
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 In your previous mail you wrote:

>  Francis, can you show us your configure.ac please?

=> it is part of the ISC Kea distrib so you can either
download the last dev sources (go to https://www.isc.org,
DOWNLOADS, Kea, Download and Kea-2.7.0.tar.gz) or simply
https://dl.cloudsmith.io/public/isc/kea-dev/raw/versions/2.7.0/kea-2.7.0.tar.gz

Thanks

Francis.Dupont@HIDDEN
Information forwarded to bug-automake@HIDDEN:
bug#72267; Package automake. Full text available.

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Subject: Re: bug#72267: automake 1.17 issue with new AM_SILENT_RULES
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To: Francis Dupont <Francis.Dupont@HIDDEN>
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On 2024-07-28 03:08, Francis Dupont wrote:
>  In your previous mail you wrote:
>
>>  Francis, can you show us your configure.ac please?
>
> => it is part of the ISC Kea distrib so you can either
> download the last dev sources (go to https://www.isc.org,
> DOWNLOADS, Kea, Download and Kea-2.7.0.tar.gz) or simply
> https://dl.cloudsmith.io/public/isc/kea-dev/raw/versions/2.7.0/kea-2.7.0.tar.gz
>
> Thanks
>
> Francis.Dupont@HIDDEN

In configure.ac, I suggest changing this:

m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])dnl be backward compatible
AC_CONFIG_HEADERS([config.h])

To this:

m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])
])dnl
AC_CONFIG_HEADERS([config.h])

Alternately just leave it the same and remove the dnl instead, and don't
worry about the extra newline with some automake versions.

Hope that helps,
  Nick
Information forwarded to bug-automake@HIDDEN:
bug#72267; Package automake. Full text available.

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    nb> there must be an expansion written somewhere in configure.ac
    which is producing the problematic construct.

Thanks Nick.

Francis, can you show us your configure.ac please?

    But at the same time, it is probably not a big deal to restore the
    extra newline in Automake.  But maybe use m4_newline() to make it
    extremely obvious that it was put there on purpose.

Ack. Thanks.

(Unfortunately it will be some time before I can get back to Automake.
If anyone else wants to jump in with patches, so much the better.)

Karl
Information forwarded to bug-automake@HIDDEN:
bug#72267; Package automake. Full text available.

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Subject: Re: bug#72267: automake 1.17 issue with new AM_SILENT_RULES
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On 2024-07-23 13:23, Francis Dupont wrote:
> I use homebrew on macOS Sonoma 14.5. This package system
> installed the version 1.17 automake (I use a binary package
> but the source one refers to this metadata:
>   desc "Tool for generating GNU Standards-compliant Makefiles"
>   homepage "https://www.gnu.org/software/automake/"
>   url "https://ftp.gnu.org/gnu/automake/automake-1.17.tar.xz"
>   mirror "https://ftpmirror.gnu.org/automake/automake-1.17.tar.xz"
>   sha256 "8920c1fc411e13b90bf704ef9db6f29d540e76d232cb3b2c9f4dc4cc599bd990"
>   license "GPL-2.0-or-later"
> 
> My problem is simple: configure generated by autoreconf includes
> this line:
> AM_DEFAULT_VERBOSITY=0ac_config_headers="$ac_config_headers config.h"
> 
> i.e. the last macro generating AM_DEFAULT_VERBOSITY setting
> misses to add a newline after its expansion.
> 
> I can propose an easy patch which fixes the problem for me:
> at the end of the silent.m4 file (m4 directory in sources
> but installed at another location my homebrew add a newline
> in the AM_SILENT_RULES macro setting AM_DEFAULT_VERBOSITY:
> 
> --- /usr/local/Cellar/automake/1.17/share/aclocal-1.17/silent.m4-orig-nl	2024-07-12 07:21:44
> +++ /usr/local/Cellar/automake/1.17/share/aclocal-1.17/silent.m4		2024-07-23 07:40:50
> @@ -68,4 +68,5 @@
>  # empty being verbose).
>  AC_DEFUN([AM_SILENT_RULES],
>  [AC_REQUIRE([_AM_SILENT_RULES])
> -AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])])
> +AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])
> +])

As far as I can see nothing in Automake expands AM_SILENT_RULES so
there must be an expansion written somewhere in configure.ac which is
producing the problematic construct.

The usual convention for an autoconf macro that ends in a shell command
is not to include a newline.  The newline present where a macro is
expanded serves to terminate the command.  Otherwise we'd have to write
dnl after basiclaly everything just to avoid unneeded newlines.

However, it is true that this is a change in behaviour.  Automake 1.16.5
didn't follow this convention and it does produce a newline at the end
of the AM_SILENT_RULES expansion.

So before, if you wrote something like:

  AM_SILENT_RULES([no])something else without intervening newline

it would work before (and avoid an extra newline) but now indeed it
probably will not work.

If possible, it is probably a good idea to change whatever package was
broken by this.  But at the same time, it is probably not a big deal to
restore the extra newline in Automake.  But maybe use m4_newline() to
make it extremely obvious that it was put there on purpose.

Cheers,
  Nick
Information forwarded to bug-automake@HIDDEN:
bug#72267; Package automake. Full text available.

Message received at 72267 <at> debbugs.gnu.org:


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    AM_DEFAULT_VERBOSITY=0ac_config_headers="$ac_config_headers config.h"

Thank you very much for the report and patch (which looks perfectly
reasonable at first blush). I am surprised there's no test for this so
that it would have been caught before the release. I'll look into it as
soon as I have a chance. --thanks again, karl.
Information forwarded to bug-automake@HIDDEN:
bug#72267; Package automake. Full text available.

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Subject: automake 1.17 issue with new AM_SILENT_RULES
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I use homebrew on macOS Sonoma 14.5. This package system
installed the version 1.17 automake (I use a binary package
but the source one refers to this metadata:
  desc "Tool for generating GNU Standards-compliant Makefiles"
  homepage "https://www.gnu.org/software/automake/"
  url "https://ftp.gnu.org/gnu/automake/automake-1.17.tar.xz"
  mirror "https://ftpmirror.gnu.org/automake/automake-1.17.tar.xz"
  sha256 "8920c1fc411e13b90bf704ef9db6f29d540e76d232cb3b2c9f4dc4cc599bd990"
  license "GPL-2.0-or-later"

My problem is simple: configure generated by autoreconf includes
this line:
AM_DEFAULT_VERBOSITY=0ac_config_headers="$ac_config_headers config.h"

i.e. the last macro generating AM_DEFAULT_VERBOSITY setting
misses to add a newline after its expansion.

I can propose an easy patch which fixes the problem for me:
at the end of the silent.m4 file (m4 directory in sources
but installed at another location my homebrew add a newline
in the AM_SILENT_RULES macro setting AM_DEFAULT_VERBOSITY:

--- /usr/local/Cellar/automake/1.17/share/aclocal-1.17/silent.m4-orig-nl	2024-07-12 07:21:44
+++ /usr/local/Cellar/automake/1.17/share/aclocal-1.17/silent.m4		2024-07-23 07:40:50
@@ -68,4 +68,5 @@
 # empty being verbose).
 AC_DEFUN([AM_SILENT_RULES],
 [AC_REQUIRE([_AM_SILENT_RULES])
-AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])])
+AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])
+])

Regards

Francis.Dupont@HIDDEN (or fdupont@HIDDEN)
Acknowledgement sent to Francis Dupont <Francis.Dupont@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-automake@HIDDEN. Full text available.
Report forwarded to bug-automake@HIDDEN:
bug#72267; Package automake. Full text available.
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