Received: (at 9587) by debbugs.gnu.org; 19 Oct 2011 15:19:21 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Oct 19 11:19:21 2011 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1RGXvM-00041N-MT for submit <at> debbugs.gnu.org; Wed, 19 Oct 2011 11:19:21 -0400 Received: from mail.elliptictech.com ([209.217.122.41] helo=mail.ellipticsemi.com) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <nbowler@HIDDEN>) id 1RGXvK-000419-AW for 9587 <at> debbugs.gnu.org; Wed, 19 Oct 2011 11:19:19 -0400 Received: from nbowler by mail.ellipticsemi.com with local (Exim 4.76) (envelope-from <nbowler@HIDDEN>) id 1RGXu8-0006Gk-ES; Wed, 19 Oct 2011 11:18:04 -0400 Date: Wed, 19 Oct 2011 11:18:04 -0400 From: Nick Bowler <nbowler@HIDDEN> To: Stefano Lattarini <stefano.lattarini@HIDDEN> Subject: Re: bug#9587: Automake claims $(*F), $(<D), etc. are non-POSIX. Message-ID: <20111019151804.GA7083@HIDDEN> References: <20110923190208.GA30532@HIDDEN> <20110923194713.GA21467@HIDDEN> <201110191105.22845.stefano.lattarini@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201110191105.22845.stefano.lattarini@HIDDEN> Organization: Elliptic Technologies Inc. User-Agent: Mutt/1.5.21 (2010-09-15) X-Spam-Score: -3.6 (---) X-Debbugs-Envelope-To: 9587 Cc: bug-automake@HIDDEN, 9587 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Sender: debbugs-submit-bounces <at> debbugs.gnu.org Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org X-Spam-Score: -3.5 (---) On 2011-10-19 11:05 +0200, Stefano Lattarini wrote: > On Friday 23 September 2011, Nick Bowler wrote: > > Neither bmake nor pmake seem too support $(?F) or $(?D) (both expand > > to be empty in both inference and target rules). And dmake seems to > > differ slightly from POSIX wrt the "D" variants. Quoting IEEE Std > > 1003.1-2004 again: > > > > > The directory part is the path prefix of the file without a > > > trailing slash; for the current directory, the directory part is '.'. > > > > For all the "D" variants, dmake puts a trailing slash contrary to the > > above, and for the current directory expands to the empty string instead > > of "." as required. > > Given this, and the fact that no-one has complained about this automake > limitation so far, I'm oriented at simply leave the situation as is. The only reason I didn't notice this before is I've been unknowingly running for years without portability warnings enabled. I didn't realize (until now) that they get disabled by "foreign" in: AM_INIT_AUTOMAKE([-Wall -Werror foreign ...]). While it's certainly possible to avoid the use of these macros by doing it in the shell, they're invaluable in non-recursive build systems: probably about half of the suffix rules that I write contain either $(@D) or $(*F) (automake only warns about the latter). Amusingly, of those two variables in the make implementations that I've tested, only $(@D) has portability issues (dmake) -- and it's the one that automake *doesn't* warn about. The dmake issues noted above are pretty minor: I doubt a trailing slash in a directory name would affect many rules, though an empty string instead of "." might. But since these macros are really only useful for working with files *not* in the current working directory, this also seems unlikely to affect many rules (but I guess deserves a note). But yeah, $(?F) and $(?D) are obviously not portable. This is unfortunate, but I haven't actually used these particular macros before. Incidentally, automake also produces similar non-POSIX warnings about $(<), $(*), $(%) and $(?), which are the same as $<, $*, $% and $?, respectively. It also warns about things like $(<:.foo=.bar). Cheers, -- Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
bug-automake@HIDDEN:bug#9587; Package automake.
Full text available.Received: (at submit) by debbugs.gnu.org; 19 Oct 2011 15:19:35 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Oct 19 11:19:35 2011 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1RGXvb-00041l-5q for submit <at> debbugs.gnu.org; Wed, 19 Oct 2011 11:19:35 -0400 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <nbowler@HIDDEN>) id 1RGXvZ-00041a-82 for submit <at> debbugs.gnu.org; Wed, 19 Oct 2011 11:19:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <nbowler@HIDDEN>) id 1RGXuO-00023D-OX for submit <at> debbugs.gnu.org; Wed, 19 Oct 2011 11:18:24 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([140.186.70.17]:56855) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <nbowler@HIDDEN>) id 1RGXuO-000239-Mz for submit <at> debbugs.gnu.org; Wed, 19 Oct 2011 11:18:20 -0400 Received: from eggs.gnu.org ([140.186.70.92]:53201) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <nbowler@HIDDEN>) id 1RGXuK-00049E-I1 for bug-automake@HIDDEN; Wed, 19 Oct 2011 11:18:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <nbowler@HIDDEN>) id 1RGXuE-00022K-V9 for bug-automake@HIDDEN; Wed, 19 Oct 2011 11:18:16 -0400 Received: from mail.elliptictech.com ([209.217.122.41]:56462 helo=mail.ellipticsemi.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <nbowler@HIDDEN>) id 1RGXuE-000223-Ev for bug-automake@HIDDEN; Wed, 19 Oct 2011 11:18:10 -0400 Received: from nbowler by mail.ellipticsemi.com with local (Exim 4.76) (envelope-from <nbowler@HIDDEN>) id 1RGXu8-0006Gk-ES; Wed, 19 Oct 2011 11:18:04 -0400 Date: Wed, 19 Oct 2011 11:18:04 -0400 From: Nick Bowler <nbowler@HIDDEN> To: Stefano Lattarini <stefano.lattarini@HIDDEN> Subject: Re: bug#9587: Automake claims $(*F), $(<D), etc. are non-POSIX. Message-ID: <20111019151804.GA7083@HIDDEN> References: <20110923190208.GA30532@HIDDEN> <20110923194713.GA21467@HIDDEN> <201110191105.22845.stefano.lattarini@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201110191105.22845.stefano.lattarini@HIDDEN> Organization: Elliptic Technologies Inc. User-Agent: Mutt/1.5.21 (2010-09-15) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.17 X-Spam-Score: -5.4 (-----) X-Debbugs-Envelope-To: submit Cc: bug-automake@HIDDEN, 9587 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Sender: debbugs-submit-bounces <at> debbugs.gnu.org Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org X-Spam-Score: -5.5 (-----) On 2011-10-19 11:05 +0200, Stefano Lattarini wrote: > On Friday 23 September 2011, Nick Bowler wrote: > > Neither bmake nor pmake seem too support $(?F) or $(?D) (both expand > > to be empty in both inference and target rules). And dmake seems to > > differ slightly from POSIX wrt the "D" variants. Quoting IEEE Std > > 1003.1-2004 again: > > > > > The directory part is the path prefix of the file without a > > > trailing slash; for the current directory, the directory part is '.'. > > > > For all the "D" variants, dmake puts a trailing slash contrary to the > > above, and for the current directory expands to the empty string instead > > of "." as required. > > Given this, and the fact that no-one has complained about this automake > limitation so far, I'm oriented at simply leave the situation as is. The only reason I didn't notice this before is I've been unknowingly running for years without portability warnings enabled. I didn't realize (until now) that they get disabled by "foreign" in: AM_INIT_AUTOMAKE([-Wall -Werror foreign ...]). While it's certainly possible to avoid the use of these macros by doing it in the shell, they're invaluable in non-recursive build systems: probably about half of the suffix rules that I write contain either $(@D) or $(*F) (automake only warns about the latter). Amusingly, of those two variables in the make implementations that I've tested, only $(@D) has portability issues (dmake) -- and it's the one that automake *doesn't* warn about. The dmake issues noted above are pretty minor: I doubt a trailing slash in a directory name would affect many rules, though an empty string instead of "." might. But since these macros are really only useful for working with files *not* in the current working directory, this also seems unlikely to affect many rules (but I guess deserves a note). But yeah, $(?F) and $(?D) are obviously not portable. This is unfortunate, but I haven't actually used these particular macros before. Incidentally, automake also produces similar non-POSIX warnings about $(<), $(*), $(%) and $(?), which are the same as $<, $*, $% and $?, respectively. It also warns about things like $(<:.foo=.bar). Cheers, -- Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
bug-automake@HIDDEN:bug#9587; Package automake.
Full text available.Stefano Lattarini <stefano.lattarini@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.
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From: Stefano Lattarini <stefano.lattarini@HIDDEN>
To: bug-automake@HIDDEN
Subject: Re: bug#9587: Automake claims $(*F), $(<D), etc. are non-POSIX.
Date: Wed, 19 Oct 2011 11:05:22 +0200
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severity 9587 minor
thanks
Hi Nick, sorry for the delay.
On Friday 23 September 2011, Nick Bowler wrote:
> On 2011-09-23 15:02 -0400, Nick Bowler wrote:
> > These variables are supported by (at least) bmake, pmake, dmake and GNU
> > make. I can reproduce this with the following example:
>
> I spoke a bit too soon here. Neither bmake nor pmake seem too support
> $(?F) or $(?D) (both expand to be empty in both inference and target
> rules). And dmake seems to differ slightly from POSIX wrt the "D"
> variants. Quoting IEEE Std 1003.1-2004 again:
>
> > The directory part is the path prefix of the file without a
> > trailing slash; for the current directory, the directory part is '.'.
>
> For all the "D" variants, dmake puts a trailing slash contrary to the
> above, and for the current directory expands to the empty string instead
> of "." as required.
>
Given this, and the fact that no-one has complained about this automake
limitation so far, I'm oriented at simply leave the situation as is.
Still, if someone else do care, and write a proper patch to improve the
situation, I'd be happy to consider it. A "proper" patch should do the
following:
- Add a test, say "spy-internal-macros.test", which ensures that all
the POSIX internal macros Automake does not warn about are supported
by the make implementation that is being used in the tests.
- For POSIX-mandated internal macros that are not portable in practice,
Automake should give an error stating "non-portable internal macros"
(or something like that), rather than "non-POSIX variable name".
Regards,
Stefano
bug-automake@HIDDEN:bug#9587; Package automake.
Full text available.
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From: Stefano Lattarini <stefano.lattarini@HIDDEN>
To: bug-automake@HIDDEN
Subject: Re: bug#9587: Automake claims $(*F), $(<D), etc. are non-POSIX.
Date: Wed, 19 Oct 2011 11:05:22 +0200
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severity 9587 minor
thanks
Hi Nick, sorry for the delay.
On Friday 23 September 2011, Nick Bowler wrote:
> On 2011-09-23 15:02 -0400, Nick Bowler wrote:
> > These variables are supported by (at least) bmake, pmake, dmake and GNU
> > make. I can reproduce this with the following example:
>
> I spoke a bit too soon here. Neither bmake nor pmake seem too support
> $(?F) or $(?D) (both expand to be empty in both inference and target
> rules). And dmake seems to differ slightly from POSIX wrt the "D"
> variants. Quoting IEEE Std 1003.1-2004 again:
>
> > The directory part is the path prefix of the file without a
> > trailing slash; for the current directory, the directory part is '.'.
>
> For all the "D" variants, dmake puts a trailing slash contrary to the
> above, and for the current directory expands to the empty string instead
> of "." as required.
>
Given this, and the fact that no-one has complained about this automake
limitation so far, I'm oriented at simply leave the situation as is.
Still, if someone else do care, and write a proper patch to improve the
situation, I'd be happy to consider it. A "proper" patch should do the
following:
- Add a test, say "spy-internal-macros.test", which ensures that all
the POSIX internal macros Automake does not warn about are supported
by the make implementation that is being used in the tests.
- For POSIX-mandated internal macros that are not portable in practice,
Automake should give an error stating "non-portable internal macros"
(or something like that), rather than "non-POSIX variable name".
Regards,
Stefano
bug-automake@HIDDEN:bug#9587; Package automake.
Full text available.Received: (at 9587) by debbugs.gnu.org; 23 Sep 2011 19:47:45 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Sep 23 15:47:45 2011 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1R7Bir-000696-2r for submit <at> debbugs.gnu.org; Fri, 23 Sep 2011 15:47:45 -0400 Received: from dsl-67-204-24-19.acanac.net ([67.204.24.19] helo=mail.ellipticsemi.com) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <nbowler@HIDDEN>) id 1R7Bio-00068r-47 for 9587 <at> debbugs.gnu.org; Fri, 23 Sep 2011 15:47:43 -0400 Received: from nbowler by mail.ellipticsemi.com with local (Exim 4.76) (envelope-from <nbowler@HIDDEN>) id 1R7BiL-0005aZ-5H for 9587 <at> debbugs.gnu.org; Fri, 23 Sep 2011 15:47:13 -0400 Date: Fri, 23 Sep 2011 15:47:13 -0400 From: Nick Bowler <nbowler@HIDDEN> To: 9587 <at> debbugs.gnu.org Subject: Re: Automake claims $(*F), $(<D), etc. are non-POSIX. Message-ID: <20110923194713.GA21467@HIDDEN> References: <20110923190208.GA30532@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110923190208.GA30532@HIDDEN> Organization: Elliptic Technologies Inc. User-Agent: Mutt/1.5.21 (2010-09-15) X-Spam-Score: -2.5 (--) X-Debbugs-Envelope-To: 9587 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Sender: debbugs-submit-bounces <at> debbugs.gnu.org Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org X-Spam-Score: -2.5 (--) On 2011-09-23 15:02 -0400, Nick Bowler wrote: > These variables are supported by (at least) bmake, pmake, dmake and GNU > make. I can reproduce this with the following example: I spoke a bit too soon here. Neither bmake nor pmake seem too support $(?F) or $(?D) (both expand to be empty in both inference and target rules). And dmake seems to differ slightly from POSIX wrt the "D" variants. Quoting IEEE Std 1003.1-2004 again: > The directory part is the path prefix of the file without a > trailing slash; for the current directory, the directory part is '.'. For all the "D" variants, dmake puts a trailing slash contrary to the above, and for the current directory expands to the empty string instead of "." as required. -- Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
bug-automake@HIDDEN:bug#9587; Package automake.
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Date: Fri, 23 Sep 2011 15:02:08 -0400
From: Nick Bowler <nbowler@HIDDEN>
To: bug-automake@HIDDEN
Subject: Automake claims $(*F), $(<D), etc. are non-POSIX.
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Hello,
When running automake without "foreign" in configure.ac it claims that
variables such as $(*F), $(<D), etc. are non-POSIX, with an error of the
form:
Makefile.am:2: *F: non-POSIX variable name
The complaints *do* occur with automake --foreign; you have to actually
put foreign in configure.ac (or in AUTOMAKE_OPTIONS) to make them go
away. Regardless, automake does not complain about $(@F) or $(@D).
However, $(*F) and friends are most certainly POSIX variable names.
Quoting IEEE Std 1003.1-2004:
> The five internal macros are [... $@, $%, $?, $<, $* ...].
>
> Each of the internal macros has an alternative form. When an
> uppercase 'D' or 'F' is appended to any of the macros, the meaning
> shall be changed to the directory part for 'D' and filename part for
> 'F'. The directory part is the path prefix of the file without a
> trailing slash; for the current directory, the directory part is '.'.
> When the $? macro contains more than one prerequisite filename, the
> $(?D) and $(?F) (or ${?D} and ${?F}) macros expand to a list of
> directory name parts and filename parts respectively.
These variables are supported by (at least) bmake, pmake, dmake and GNU
make. I can reproduce this with the following example:
% cat >Makefile.am <<'EOF'
.foo.bar:
echo "$(@F) $(%F) $(?F) $(<F) $(*F) $(@D) $(%D) $(?D) $(<D) $(*D)" > $@
EOF
% cat >configure.ac <<'EOF'
AC_INIT([test], [1.0])
AM_INIT_AUTOMAKE([-Wall])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
EOF
% aclocal
% automake --add-missing --foreign
configure.ac:3: installing `./install-sh'
configure.ac:3: installing `./missing'
Makefile.am:2: %F: non-POSIX variable name
Makefile.am:2: ?F: non-POSIX variable name
Makefile.am:2: <F: non-POSIX variable name
Makefile.am:2: *F: non-POSIX variable name
Makefile.am:2: %D: non-POSIX variable name
Makefile.am:2: ?D: non-POSIX variable name
Makefile.am:2: <D: non-POSIX variable name
Makefile.am:2: *D: non-POSIX variable name
Cheers,
--
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
Nick Bowler <nbowler@HIDDEN>:bug-automake@HIDDEN.
Full text available.bug-automake@HIDDEN:bug#9587; Package automake.
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