Re: Accommodate non-recursive Automake in a less hacky way

[Bruno Haible]

Paul Eggert wrote:
> Unless I'm missing something, the "Move .h file names out of the *.m4 
> files" patch omitted an "if GL_GENERATE_GEOPT_H" in getopt-posix. I 
> installed the attached to finish this part up.

This was not a regression. The Automake conditional was in fact not used,
since the beginning of the getopt-posix and getopt-gnu modules. Apparently
we considered this optimization "not worth it".

But this optimization is OK. I verified that it works fine on
  - Linux/glibc, from CentOS 6 to Ubuntu 20.04
  - Linux/musl
  - Hurd
  - FreeBSD, NetBSD, OpenBSD
  - macOS 10, 12
  - AIX 7.1
  - Solaris 9, 10, 11
  - IRIX 6.5

Bruno