From: Adam Spiers <git@adamspiers.org>
To: git list <git@vger.kernel.org>
Subject: Re: [PATCH 3/3] Makefile: use -Wdeclaration-after-statement if supported
Date: Mon, 17 Dec 2012 02:15:01 +0000 [thread overview]
Message-ID: <20121217021501.GA13745@gmail.com> (raw)
In-Reply-To: <7vk3shphru.fsf@alter.siamese.dyndns.org>
On Sun, Dec 16, 2012 at 05:52:05PM -0800, Junio C Hamano wrote:
> Adam Spiers <git@adamspiers.org> writes:
>
> > If we adopt this approach,...
> > diff --git a/Makefile b/Makefile
> > index a49d1db..aae70d4 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -331,8 +331,13 @@ endif
> > # CFLAGS and LDFLAGS are for the users to override from the command line.
> >
> > CFLAGS = -g -O2 -Wall
> > +GCC_DECL_AFTER_STATEMENT = \
> > + $(shell $(CC) --help -v 2>&1 | \
> > + grep -q -- -Wdeclaration-after-statement && \
> > + echo -Wdeclaration-after-statement)
> > +GCC_FLAGS = $(GCC_DECL_AFTER_STATEMENT)
> > +ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS) $(GCC_FLAGS)
> > LDFLAGS =
> > -ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS)
> > ALL_LDFLAGS = $(LDFLAGS)
>
> Please do not do this.
>
> People cannot disable it from the command line, like:
>
> $ make V=1 CFLAGS='-g -O0 -Wall'
>
> If anything, this should be part of the default CFLAGS.
>
> More importantly, this will run the $(shell ...) struct once for
> every *.o file we produce, I think, in addition to running it twice
> for the whole build.
[snipped]
OK; I expect these issues with the implementation are all
surmountable. I did not necessarily expect this to be the final
implementation anyhow, as indicated by my comments below the divider
line. However it's not clear to me what you think about the idea in
principle, and whether other compiler flags would merit inclusion.
(And also, please don't let this discussion hold up acceptance of the
two prior patches in the series. Even though they are independent,
they are somewhat logically related so I grouped them into the same
series, although I'm not sure if that was the right thing to do.)
next prev parent reply other threads:[~2012-12-17 2:15 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-02 0:12 [PATCH 0/9] new git check-ignore sub-command Adam Spiers
2012-09-02 0:12 ` [PATCH 1/9] Update directory listing API doc to match code Adam Spiers
2012-09-02 0:12 ` [PATCH 2/9] Improve documentation and comments regarding directory traversal API Adam Spiers
2012-09-02 0:12 ` [PATCH 3/9] Rename cryptic 'which' variable to more consistent name Adam Spiers
2012-09-02 19:56 ` Junio C Hamano
2012-09-02 0:12 ` [PATCH 4/9] Refactor excluded_from_list Adam Spiers
2012-09-04 12:32 ` Nguyen Thai Ngoc Duy
2012-09-02 0:12 ` [PATCH 5/9] Refactor excluded and path_excluded Adam Spiers
2012-09-04 12:40 ` Nguyen Thai Ngoc Duy
2012-09-04 17:23 ` Junio C Hamano
2012-09-05 10:28 ` Nguyen Thai Ngoc Duy
2012-09-06 3:21 ` Junio C Hamano
2012-09-06 12:13 ` Nguyen Thai Ngoc Duy
2012-09-06 14:59 ` Thiago Farina
2012-09-06 15:05 ` Nguyen Thai Ngoc Duy
2012-09-06 17:42 ` Adam Spiers
2012-09-06 21:07 ` Junio C Hamano
2012-09-02 0:12 ` [PATCH 6/9] For each exclude pattern, store information about where it came from Adam Spiers
2012-09-02 17:00 ` Philip Oakley
2012-09-02 19:02 ` Junio C Hamano
2012-09-02 22:36 ` Philip Oakley
2012-09-06 17:56 ` Adam Spiers
2012-09-02 0:12 ` [PATCH 7/9] Extract some useful pathspec handling code from builtin/add.c into a library Adam Spiers
2012-09-02 0:12 ` [PATCH 8/9] Provide free_directory() for reclaiming dir_struct memory Adam Spiers
2012-09-02 0:12 ` [PATCH 9/9] Add git-check-ignores Adam Spiers
2012-09-02 10:41 ` Nguyen Thai Ngoc Duy
2012-09-02 14:50 ` Adam Spiers
2012-09-02 20:38 ` Junio C Hamano
2012-09-03 4:14 ` Nguyen Thai Ngoc Duy
2012-09-02 20:41 ` Junio C Hamano
2012-09-03 1:47 ` Junio C Hamano
2012-09-20 19:46 ` [PATCH v2 00/14] new git check-ignore sub-command Adam Spiers
2012-09-20 19:46 ` [PATCH v2 01/14] Update directory listing API doc to match code Adam Spiers
2012-09-20 19:46 ` [PATCH v2 02/14] Improve documentation and comments regarding directory traversal API Adam Spiers
2012-09-20 19:46 ` [PATCH v2 03/14] Rename cryptic 'which' variable to more consistent name Adam Spiers
2012-09-20 19:46 ` [PATCH v2 04/14] Rename path_excluded() to is_path_excluded() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 05/14] Rename excluded_from_list() to is_excluded_from_list() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 06/14] Rename excluded() to is_excluded() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 07/14] Refactor is_excluded_from_list() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 08/14] Refactor is_excluded() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 09/14] Refactor is_path_excluded() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 10/14] For each exclude pattern, store information about where it came from Adam Spiers
2012-09-20 21:31 ` Junio C Hamano
2012-12-26 15:46 ` Adam Spiers
2012-09-20 19:46 ` [PATCH v2 11/14] Refactor treat_gitlinks() Adam Spiers
2012-09-20 19:46 ` [PATCH v2 12/14] Extract some useful pathspec handling code from builtin/add.c into a library Adam Spiers
2012-09-21 7:54 ` Michael Haggerty
2012-09-20 19:46 ` [PATCH v2 13/14] Provide free_directory() for reclaiming dir_struct memory Adam Spiers
2012-09-21 8:03 ` Michael Haggerty
2012-09-21 16:11 ` Junio C Hamano
2012-09-20 19:46 ` [PATCH v2 14/14] Add git-check-ignore sub-command Adam Spiers
2012-09-21 5:44 ` Johannes Sixt
2012-09-25 23:25 ` Junio C Hamano
2012-09-26 5:49 ` Johannes Sixt
2012-09-26 14:03 ` Junio C Hamano
2012-09-21 7:23 ` Michael Haggerty
2012-09-21 16:27 ` Junio C Hamano
2012-09-21 19:42 ` Junio C Hamano
2012-09-20 21:26 ` [PATCH v2 00/14] new git check-ignore sub-command Junio C Hamano
2012-09-20 21:43 ` Junio C Hamano
2012-09-20 23:45 ` Adam Spiers
2012-09-21 4:34 ` Junio C Hamano
2012-12-16 19:35 ` [PATCH 0/3] Help newbie git developers avoid obvious pitfalls Adam Spiers
2012-12-16 19:35 ` [PATCH 1/3] SubmittingPatches: add convention of prefixing commit messages Adam Spiers
2012-12-16 23:15 ` Junio C Hamano
2012-12-16 19:36 ` [PATCH 2/3] Documentation: move support for old compilers to CodingGuidelines Adam Spiers
2012-12-16 19:36 ` [PATCH 3/3] Makefile: use -Wdeclaration-after-statement if supported Adam Spiers
2012-12-17 1:52 ` Junio C Hamano
2012-12-17 2:15 ` Adam Spiers [this message]
2012-12-17 4:18 ` Junio C Hamano
2012-12-22 12:25 ` Adam Spiers
2012-12-22 18:39 ` Junio C Hamano
2012-12-26 15:44 ` [PATCH v2 00/14] new git check-ignore sub-command Adam Spiers
2012-09-21 19:00 ` Junio C Hamano
2012-12-16 23:04 ` compiler checks Adam Spiers
2012-09-24 22:31 ` [PATCH v2 00/14] new git check-ignore sub-command Junio C Hamano
2012-09-04 13:06 ` [PATCH 9/9] Add git-check-ignores Nguyen Thai Ngoc Duy
2012-09-04 17:26 ` Junio C Hamano
2012-09-05 10:25 ` Nguyen Thai Ngoc Duy
2012-09-10 11:15 ` Adam Spiers
2012-09-10 11:09 ` Adam Spiers
2012-09-10 12:25 ` Nguyen Thai Ngoc Duy
2012-09-10 16:30 ` Junio C Hamano
2012-09-02 20:35 ` [PATCH 0/9] new git check-ignore sub-command Junio C Hamano
2012-09-06 17:44 ` Adam Spiers
2012-09-07 10:03 ` Adam Spiers
2012-09-07 16:45 ` Junio C Hamano
2012-09-19 19:00 ` [PATCH] Document conventions on static initialization and else cuddling Adam Spiers
2012-09-19 20:43 ` Junio C Hamano
2012-09-19 21:14 ` Adam Spiers
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