Hi,

with the latest gnulib (a7903da07d3d18c23314aa0815adbb4058fd7cec) on
Debian Stretch:

In file included from /usr/include/string.h:630:0,
                 from ./string.h:41,
                 from strndup.c:21:
strndup.c:26:1: error: expected identifier or '(' before '__extension__'
 strndup (char const *s, size_t n)
 ^

config.log is at
https://gitlab.com/gnuwget/wget2/-/jobs/395706872/artifacts/file/config.log.

Regards, Tim