GNU bug report logs - #10237
AM_SILENT_RULES does not work with NonStop make

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefano Lattarini <stefano.lattarini <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#10237: closed (AM_SILENT_RULES does not work with NonStop make)
Date: Fri, 30 Dec 2011 12:54:02 +0000

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Your message dated Fri, 30 Dec 2011 13:50:04 +0100
with message-id <4EFDB37C.80106 <at> gmail.com>
and subject line Re: bug#10237: bug#9928: AM_SILENT_RULES does not work with NonStop make
has caused the debbugs.gnu.org bug report #10237,
regarding AM_SILENT_RULES does not work with NonStop make
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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10237: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10237
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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: bug-automake <at> gnu.org
Cc: "Daniel Richard G." <skunk <at> iSKUNK.ORG>
Subject: AM_SILENT_RULES does not work with NonStop make
Date: Tue, 06 Dec 2011 09:51:32 -0800

If AM_SILENT_RULES is used, Automake generates Makefile.in
files with lines like this:

  AM_V_CC = $(am__v_CC_$(V))
  am__v_CC_ = $(am__v_CC_$(AM_DEFAULT_VERBOSITY))

and these are copied into Makefile unchanged.  Unfortunately, as
the Automake documentation notes, these lines do not conform to
the POSIX rules for 'make', and as a result packages like
Coreutils that use AM_SILENT_RULES won't build on machines whose
'make' implementations conform to POSIX but disagree with GNU make
in this area.  This is a problem with the current release of
Coreutils, which doesn't build on HP's NonStop OS (see Bug#10234).

The simplest fix for Coreutils is to not use AM_SILENT_RULES but
that defeats the purpose of the Automake feature.  How about the
following idea instead?  Automake could put something like the
following into Makefile.in:

  AM_V_CC = $(am__v_CC_ <at> AM_V@)
  am__v_CC_ = $(am__v_CC_ <at> AM_DEFAULT_VERBOSITY@)

and then Automake can do something like this:

    if make supports $(...$(...)); then
      AM_V='$(V)'
      AM_DEFAULT_VERBOSITY='$(AM_DEFAULT_VERBOSITY)'
    else
      AM_V=1
      AM_DEFAULT_VERBOSITY=1
    fi
    AC_SUBST([AM_V])
    AC_SUBST([AM_DEFAULT_VERBOSITY])

That way, Coreutils could continue to use AM_SILENT_RULES, and
these rules would work as usual on most hosts that use GNU
make-ish syntax in this area, but the rules wouldn't break on
hosts that support POSIX but not GNU make.

This idea should also fix Bug#9928 (in a different way from
what's proposed there), so I'll CC: its reporter.

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From: Stefano Lattarini <stefano.lattarini <at> gmail.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 10237-done <at> debbugs.gnu.org, automake-patches <at> gnu.org,
	9928-done <at> debbugs.gnu.org, skunk <at> iskunk.org
Subject: Re: bug#10237: bug#9928: AM_SILENT_RULES does not work with NonStop
	make
Date: Fri, 30 Dec 2011 13:50:04 +0100

On 12/28/2011 09:19 PM, Stefano Lattarini wrote:
>
> I did some testing on Debian unstable, Solaris 10, NetBSD 5.1 and Cygwin 1.5 (in
> part by running the relevant test cases from the automake testsuite, in part
> trying out the build system of GNU coreutils).   Everything seems fine so far.
> I want to do some small improvements to the documentation, then I say we are
> ready to merge the 'silent-fixes' branch into maint.
>
I've just re-read Paul's changes to the manual, and on a second thought, I think
they are definitely good enough as they are.  I've thus merged the 'silent-fixes'
branch into maint, and pushed.  I'm thus closing the bugs #9928 and #10237.

Thanks,
  Stefano

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