Re: Avoid -Wtrailing-whitespace in config.h.

On Sat, Oct 4, 2025, at 2:03 AM, Collin Funk wrote:
> This patch changes config.status to write the following in config.h:
>
>     #define TRAILING_WHITESPACE /**/
>
> When the following lines are in configure.ac:
>
>     trailing_whitespace=
>     AC_DEFINE_UNQUOTED([TRAILING_WHITESPACE], [$trailing_whitespace],
>                        [trailing whitespace])
>
> Previously it would have trailing whitespace instead of /**/ causing
> annoying GCC warnings.

Thanks for the patch; however, the awk logic needs to handle arbitrary
sequences of spaces and tabs, not just a single space.  (It can map
them all to " /**/"; we're generating a C #define directive, so we know
that all nonempty sequences of spaces and tabs are equivalent in context.)

Please also add a test case.

zw