INSTALL: document the minimum Linux kernel level
The change associated with gerrit #14300 removed support for older
Linux kernels (2.6.10 and earlier).
The commit 'Import of code from autoconf-archive' (
d8205bbb4) introduced
a check for Autoconf 2.64. Autoconf 2.64 was released in 2009.
The commit 'regen.sh: Use libtoolize -i, and .gitignore generated
build-tools' (
a7cc505d3) introduced a dependency on libtool's '-i'
option. Libtool supported the '-i' option with libtool 1.9b in 2004.
Update the INSTALL instructions to document a minimum Linux kernel
level and the minimum levels for autoconf and libtool.
Notes: RHEL4 (EOL in 2017) had a 2.6.9 kernel and RHEL5 has a 2.6.18
kernel. RHEL5 has libtool 1.5.22 and autoconf 2.59, RHEL6 has libtool
2.2.6 and autoconf 2.63, and RHEL7 has libtool 2.4.2 and autoconf 2.69.
Change-Id: I235eeffa4adb152e05aab7aca839700816e62c83
Reviewed-on: https://gerrit.openafs.org/14305
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>