bug#64698: 29.0.92; on netbsd 9.3, gmake and "gmake bootstrap" fail to proceed

[Eli Zaretskii]

> Date: Wed, 19 Jul 2023 03:10:13 GMT
> From: Van Ly <van.ly@sdf.org>
> Cc: luangruo@yahoo.com, 64698@debbugs.gnu.org
> 
> sound.c: In function ‘alsa_write’:
> sound.c:1150:28: error: ‘ESTRPIPE’ undeclared (first use in this function); 
> did you mean ‘ESPIPE’?
>  1150 |           else if (err == -ESTRPIPE)
>       |                            ^~~~~~~~
>       |                            ESPIPE
> sound.c:1150:28: note: each undeclared identifier is reported only once for 
> each function it appears in
> gmake[3]: *** [Makefile:424: sound.o] Error 1

Thanks.

Paul, any ideas?  Do we just condition that by ESTRPIPE being defined?