Set CentOS 6.6 as default Linux version.

Since CentOS 6.5 landed in the portstree and was updated to CentOS 6.6 and we've
fixed the remaining issues, it's time to replace Fedora 10 as Linux default --
given that in the past five years it has done its service and has long since
gone EOL upstream.

The CentOS 6 series will go End of Life in 2020, this should give us some time
to keep its annual releases up to date.

If you have not switched to using CentOS 6.6 ports, please refer to today's
UPDATING entry -- it contains detailed instructions.

If you have already switched to CentOS 6.6 userland,
you can now remove the following two lines from make.conf:

OVERRIDE_LINUX_BASE_PORT=c6
OVERRIDE_LINUX_NONBASE_PORTS=c6

If you encounter any difficulties, please follow the UPDATING entry from
20140922 but skip step 2. In case these steps do not fix the issues,
please submit an issue report in Bugzilla and send an email to FreeBSD's
emulation mailing list.

Differential Revision:	https://reviews.freebsd.org/D1145
Reviewed by:	wblock, bcr (doc), rene (emulation)
Approved by:	swills (mentor)
Approved by:	portmgr (swills)
Sponsored by:	Perceivon Hosting Inc.

1 files changed, 48 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index a5a34a453f38..9db1b989056a 100644
--- a/UPDATING
+++ b/UPDATING
@@ -5,6 +5,54 @@ they are unavoidable.
 You should get into the habit of checking this file for changes each time
 you update your ports collection, before attempting any port upgrades.
 
+20141209:
+  AFFECTS: users of emulators/linux_base-f10 and emulators/linux_base-c6
+  AUTHOR: xmj@freebsd.org
+
+  The CentOS ports infrastructure has replaced Fedora 10 as default.
+
+  1. Please delete all remaining f10 ports/packages:
+
+     # pkg delete -f linux_base-f10 linux-f10-\*
+
+  2. Persistently update the Linux kernel version in /etc/sysctl.conf:
+
+     compat.linux.osrelease=2.6.18
+
+    This step is necessary on all FreeBSD versions older than 10.1-RELEASE.
+
+  3. Reinstall all software depending on Linux emulation.
+     As an example, reinstall linux-firefox:
+
+     # portmaster -r linux-firefox
+       or
+     # portupgrade -f www/linux-firefox
+       or
+     # pkg install linux-firefox
+
+  If difficulties are encountered, please follow the UPDATING entry 20140922
+  but skip step 2 (OVERRIDE_LINUX_BASE_PORT and OVERRIDE_LINUX_NONBASE_PORTS
+  in /etc/make.conf). In case these steps do not fix the issues, please submit
+  an issue report in Bugzilla and send an email to FreeBSD's emulation@ mailing
+  list.
+
+  Users who need to continue using Fedora 10 base and userland should do the
+  following instead:
+  
+  1. Add these lines to /etc/make.conf:
+
+      OVERRIDE_LINUX_BASE_PORT=f10
+      OVERRIDE_LINUX_NONBASE_PORTS=f10
+
+  2. Downgrade the Linux kernel version in /etc/sysctl.conf on FreeBSD versions
+     newer than and including 10.1-RELEASE:
+
+       compat.linux.osrelease=2.6.16
+
+  This is all that is needed to continue using an existing Fedora 10 Linux base
+  and userland.
+
+
 20141208:
   AFFECTS: users of ports-mgmt/poudriere, ports-mgmt/poudriere-devel
   AUTHOR: bdrewery@FreeBSD.org