Add emerge --dynamic-deps <y|n> option.

This makes it possible to disable the dynamic dependency updates that
FakeVartree performs by default.

WARNING: If --dynamic-deps is disabled, then it is necessary to
ensure that an alternative method is used to handle package moves
in dependencies of installed packages. Normally, this is handled
by FEATURES="fixpackages", which is enabled by default and may be
disabled via make.conf(5). Alternatively, in order to manually apply
package moves, run `emaint --fix moveinst` after each emerge --sync
operation (see emaint(1)).

1 files changed, 16 insertions, 0 deletions

diff --git a/man/emerge.1 b/man/emerge.1
index 62bfd5ecd..10be7895c 100644
--- a/man/emerge.1
+++ b/man/emerge.1
@@ -407,6 +407,22 @@ when FEATURES="preserve\-libs" is enabled in
 \fBmake.conf\fR(5), since any libraries that have
 consumers will simply be preserved.
 .TP
+.BR "\-\-dynamic\-deps < y | n >"
+In dependency calculations, substitute the dependencies of installed
+packages with the dependencies of corresponding unbuilt ebuilds from
+source repositories. This causes the effective dependencies of
+installed packages to vary dynamically when source ebuild dependencies
+are modified. This option is enabled by default.
+
+\fBWARNING:\fR
+If \-\-dynamic\-deps is disabled, then it is necessary to ensure that
+an alternative method is used to handle package moves in dependencies
+of installed packages. Normally, this is handled by
+FEATURES="fixpackages", which is enabled by default and may be
+disabled via \fBmake.conf\fR(5). Alternatively, in order to manually
+apply package moves, run `emaint \-\-fix moveinst` after each
+emerge \-\-sync operation (see \fBemaint\fR(1)).
+.TP
 .BR "\-\-emptytree " (\fB\-e\fR)
 Reinstalls target atoms and their entire deep
 dependency tree, as though no packages are currently