UPDATING: Add a note about running installworld twice

Some folks seem to be hitting issues with build orchestration; presumably
some of our .WAIT-removal optimizations are going awry, and they're ending
up with applications linked against new libc being installed before the new
libc.

Letting installworld complete the first time should ensure that the new libc
is installed by the end of it, then the second installworld will ensure
consistency as everything should succeed.

1 files changed, 5 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index be57064412b7..9cd27c5f4f37 100644
--- a/UPDATING
+++ b/UPDATING
@@ -33,6 +33,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 13.x IS SLOW:
 	ports, but other non-ports software may need extra escapes removed to
 	continue to function.
 
+	Because of this change, installworld may encounter the following error
+	from rtld: Undefined symbol "regcomp@FBSD_1.6" -- It is imperative that
+	you do not halt installworld. Instead, let it run to completion (whether
+	successful or not) and run installworld once more.
+
 20200627:
 	A new implementation of bc and dc has been imorted in r362681. This
 	implementation corrects non-conformant behavior of the previous bc