BETA release of GNU Awk 5.1.1.f -- Unable to 'make html'

[Neil R. Ormos]

I tried to produce the html version of the manual
by issuing 'make html' immediately after a plain
'make' appeared to succeed.  The result was many
error messages of the form:

  gawk.texi:1359: unknown command `subentry'
  gawk.texi:1359: unknown command `seealso'
  gawk.texi:1359: misplaced {
  gawk.texi:1359: misplaced }

but referencing various line numbers,

and at the end,

  Makefile:476: recipe for target 'gawk.html' failed
  make[1]: *** [gawk.html] Error 1
  make[1]: Leaving directory 
  '$WORK/gawk-5.1.1f/doc'     
  Makefile:757: recipe for target 'html-recursive' failed
  make: *** [html-recursive] Error 1

(Upstream path components replaced with $WORK for this 
inquiry.)

What have I done wrong?

Is it necessary provide an option to ./configure to 
request the html version of the manual? 

Is the 'html' make target not intended for users? 

Is it intended that the user call makeinfo directly 
to produce the html manual instead of relying on make?

Is the html version of the manual produced only in
the install operation (e.g., 'make install', which
I did not try because I do not want to "install")?

Any other suggestions or instructions? 

Thank you.