Re: read-only $ac_executable_extensions

[Paolo Bonzini]

> AFAIK it has been introduced and is used by users as workaround
> (e.g., by setting it in config.site).  So if we can agree to it,
> we should probably document it rather than zapping it.
>
> See for example <http://www.cygwin.com/ml/cygwin/2005-01/msg01220.html>.

Or we could steal code to set it appropriately from gcc's config.build
file.

case $build in
  alpha*-dec-*vms* | \
  i[34567]86-*-cygwin* | i[34567]86-*-pe | \
  i[34567]86-*-mingw32* | \
  i[34567]86-pc-msdosdjgpp* | \
  i[34567]86-*-uwin* | \
    ac_executable_extensions=${ac_executable_extensions-'.exe'}
    ;;
esac

Paolo