- Force building make as a companion tool if host make is older than
4.0 (CentOS 7 currently has 3.82)
- Disable 2.29 as a choice if host python is older than 3.4
(CentOS 7 has 2.6 unless python from EPEL is installed)
- Python2 emits its version information to STDERR. Ugh.
While there, also use the detected host Python for GDB configuration.
Signed-off-by: Alexey Neyman <stilor@att.net>
... otherwise it fails for autoconf/automake; for some reason, newer
Ubuntu 18.10 adds extra quoting around '${SHELL}' in
$ac_cv_path_AUTOCONF.
Signed-off-by: Alexey Neyman <stilor@att.net>