[libvirt] [PATCH] maint: Update to latest gnulib

[John Ferlan]

On 01/02/2018 04:28 AM, Michal Privoznik wrote:
> Unfortunately, since gnulib's commit of 2c5d558745 there's an
> unused parameter to stat_time_normalize() function which gnulib
> developers don't want to fix [1]. Therefore, we have to work
> around it by temporarily suspending -Wunused-parameter.
> 
> 1: http://lists.gnu.org/archive/html/bug-gnulib/2018-01/msg00000.html
> 
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
> 
> While we have 'gnulib update free' push rule, this one is not trivial at
> all and thus I have not pushed it. It's ugly and I don't like it. So any
> ideas are welcome.
> 
>  .gnulib                    | 2 +-
>  bootstrap                  | 4 ++--
>  src/storage/storage_util.c | 3 +++
>  3 files changed, 6 insertions(+), 3 deletions(-)
> 


No bright ideas on this other than perhaps only including changes just
prior to the particular one that breaks things or somehow revert just
that one in our local copy.

Other thoughts require additional local changes just to "work around"
the broken definition.  Such as grabbing the "old" stat-time.h, rename
it, save it in libvirt sources, then use that new name instead of the
new .gnulib file. That's probably worse than what you've done though.

At this point, I think your solution to minimize the impact to one
include file is perhaps the easiest/best solution albeit not perfect.

It's interesting that there is no desire to fix this problem in .gnulib
especially since there are already 2 patches proposed and in reality the
change fundamentally breaks on every platform other than __sun when
STAT_TIMESPEC is defined just because it's possible (or more desirable
in the reviewers feedback) to compile with ignore unused-parameter.
Wonder what would happen if someone posted a patch to .gnulib to revert
the change for the reason that it breaks other platforms that don't
desire to configure in that manner. Perhaps Eric Blake would have some
thoughts or additional muscle with the .gnulib maintainers.

John


> diff --git a/.gnulib b/.gnulib
> index 5e9abf871..c2cb55b34 160000
> --- a/.gnulib
> +++ b/.gnulib
> @@ -1 +1 @@
> -Subproject commit 5e9abf87163ad4aeaefef0b02961f8674b0a4879
> +Subproject commit c2cb55b34e76546479f195c14202dfcc870c4914
> diff --git a/bootstrap b/bootstrap
> index 85b85c530..25920e991 100755
> --- a/bootstrap
> +++ b/bootstrap
> @@ -4,7 +4,7 @@ scriptversion=2017-09-19.08; # UTC
>  
>  # Bootstrap this package from checked-out sources.
>  
> -# Copyright (C) 2003-2017 Free Software Foundation, Inc.
> +# Copyright (C) 2003-2018 Free Software Foundation, Inc.
>  
>  # This program is free software: you can redistribute it and/or modify
>  # it under the terms of the GNU General Public License as published by
> @@ -792,7 +792,7 @@ symlink_to_dir()
>        # aren't confused into doing unnecessary builds.  Conversely, if the
>        # existing symlink's timestamp is older than the source, make it afresh,
>        # so that broken tools aren't confused into skipping needed builds.  See
> -      # <https://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00326.html>.
> +      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
>        test -h "$dst" &&
>        src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
>        dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
> diff --git a/src/storage/storage_util.c b/src/storage/storage_util.c
> index 899a55758..da6381f52 100644
> --- a/src/storage/storage_util.c
> +++ b/src/storage/storage_util.c
> @@ -64,7 +64,10 @@
>  #include "virfile.h"
>  #include "virjson.h"
>  #include "virqemu.h"
> +#pragma GCC diagnostic push
> +#pragma GCC diagnostic ignored "-Wunused-parameter"
>  #include "stat-time.h"
> +#pragma GCC diagnostic pop
>  #include "virstring.h"
>  #include "virxml.h"
>  #include "virfdstream.h"
>