Re: [Xen-devel] [PATCH v5.1 8/8] configure: do_compiler: Dump some extra info under bash

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

CC'ing the maintainers for this.

On Fri, 20 Oct 2017, Ian Jackson wrote:
> This makes it much easier to find a particular thing in config.log.
> 
> The information may be lacking in other shells, resulting in harmless
> empty output.  (This is why we don't use the proper ${FUNCNAME[*]}
> array syntax - other shells will choke on that.)
> 
> The extra output is only printed if configure is run with bash.  The
> something), it is necessary to say   bash ./configure  to get the extra
> debug info in the log.
> 
> Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
> ---
> v4: No longer tag this patch RFC.
> ---
>  configure | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/configure b/configure
> index 6f691df..21a2b15 100755
> --- a/configure
> +++ b/configure
> @@ -60,6 +60,10 @@ do_compiler() {
>      # is compiler binary to execute.
>      local compiler="$1"
>      shift
> +    echo >>config.log "
> +funcs: ${FUNCNAME}
> +lines: ${BASH_LINENO}
> +files: ${BASH_SOURCE}"
>      echo $compiler "$@" >> config.log
>      $compiler "$@" >> config.log 2>&1 || return $?
>      # Test passed. If this is an --enable-werror build, rerun
> -- 
> 2.1.4
> 

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