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Add more details about updating across the clang divide.

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Add hints about having a root shell around on live updates.
Couple of additional nits.
This commit is contained in:
Warner Losh 2013-04-20 23:33:51 +00:00
parent dff5bdf48c
commit da0e842acc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=249714
1 changed files with 12 additions and 5 deletions
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17
UPDATING
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@ -12,9 +12,9 @@ Items affecting the ports and packages system can be found in
/usr/ports/UPDATING. Please read that file before running portupgrade.
NOTE: FreeBSD has switched from gcc to clang. If you have trouble bootstrapping
from older versions of FreeBSD, try WITHOUT_CLANG and WITHOUT_CLANG_IS_CC to
bootstrap to tip of head, and then rebuild without those options. The bootstrap
process from older version of current is a bit fragile.
from older versions of FreeBSD, try WITHOUT_CLANG to bootstrap to tip of
head, and then rebuild without this option. The bootstrap process from
older version of current is a bit fragile.
NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
FreeBSD 10.x has many debugging features turned on, in both the kernel
@ -127,7 +127,10 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
This means that the world and kernel will be compiled with clang
and that clang will be installed as /usr/bin/cc, /usr/bin/c++,
and /usr/bin/cpp. To disable this behavior and revert to building
with gcc, compile with WITHOUT_CLANG_IS_CC.
with gcc, compile with WITHOUT_CLANG_IS_CC. Really old versions
of current may need to bootstrap WITHOUT_CLANG first if the clang
build fails (its compatibility window doesn't extend to the 9 stable
branch point).
20121102:
The IPFIREWALL_FORWARD kernel option has been removed. Its
@ -1609,6 +1612,11 @@ COMMON ITEMS:
path, and has the highest probability of being successful. Please try
this approach before reporting problems with a major version upgrade.
When upgrading a life system, having a root shell around before
installing anything can help undo problems. Not having a root shell
around can lead to problems if pam has changed too much from your
starting point to allow continued authentication after the upgrade.
ZFS notes
---------
When upgrading the boot ZFS pool to a new version, always follow
@ -1674,7 +1682,6 @@ COMMON ITEMS:
make delete-old [6]
<reboot>
To cross-install current onto a separate partition
--------------------------------------------------
# In this approach we use a separate partition to hold