[cairo] [PATCH v2 1/3] configure.ac: Quell warnings about AM_PROG_AR when using automake 1.12

[Uli Schlachter]

On 10.07.2014 09:19, Bryce W. Harrington wrote:
> Without this, autogen.sh issues warnings like:
>
>    /usr/share/automake-1.14/am/ltlibrary.am: warning: 'libcairoboilerplate_cxx.la': linking libtool libraries using a non-POSIX
>    /usr/share/automake-1.14/am/ltlibrary.am: archiver requires 'AM_PROG_AR' in 'configure.ac'
>    boilerplate/Makefile.am:18:   while processing Libtool library 'libcairoboilerplate_cxx.la'
>
> AM_PROG_AR was introduced in automake 1.11.2.  As per the docs for
> AM_PROG_AR, it is supposed to be included when the archiver ('ar') is
> used, but prior to automake 1.12 the warning was only shown iff
> -Wextra-portability was specified.  automake 1.12 introduced a change
> that includes -Wextra-portability when -Wall is specified.
>
> For further discussion of the issue, see:
>
>    http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11401
>    http://lists.gnu.org/archive/html/automake/2012-05/msg00014.html
>
> Signed-off-by: Bryce Harrington <b.harrington at samsung.com>

Reviewed-by: Uli Schlachter <psychon at znc.in>

> ---
>   configure.ac | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/configure.ac b/configure.ac
> index 04479ff..9f38d30 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -15,6 +15,7 @@ AC_CHECK_HEADERS([unistd.h sys/ioctl.h])
>
>   AM_INIT_AUTOMAKE([1.11 foreign -Wall no-define no-dist-gzip dist-xz])
>   AM_SILENT_RULES([yes])
> +m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) dnl Workaround for Automake 1.12
>
>   # Initialize libtool
>   LT_PREREQ([2.2])
>