Rebuild when build-time/run-time deps are upgraded.

man/emerge.1

Index: man/emerge.1
diff --git a/man/emerge.1 b/man/emerge.1
index 56823a8804a64d91074c5b2a7b77c594338d8eb8..748f0003602786de186e7928510fefbd5fb2b78f 100644
--- a/man/emerge.1
+++ b/man/emerge.1
@@ -489,6 +489,10 @@ terminal device is determined to be a TTY.  This flag disables it regardless.
 A space separated list of package names or slot atoms. Emerge will ignore
 matching binary packages.
 .TP
+.BR "\-\-norebuild\-atoms " ATOMS
+A space separated list of package names or slot atoms. Emerge will not rebuild
+matching packages due to \fB\-\-rebuild\fR.
+.TP
 .BR "\-\-oneshot " (\fB\-1\fR)
 Emerge as normal, but do not add the packages to the world file
 for later updating.
@@ -538,6 +542,10 @@ Disable the warning message that's shown prior to
 to be set in the \fBmake.conf\fR(5)
 \fBEMERGE_DEFAULT_OPTS\fR variable.
 .TP
+.BR "\-\-rebuild [ y | n ]"
+Rebuild packages when dependencies that are used at both build-time and
+run-time are upgraded.
+.TP
 .BR "\-\-rebuilt\-binaries [ y | n ]"
 Replace installed packages with binary packages that have
 been rebuilt. Rebuilds are detected by comparison of