Makefile.inc1: Don't unnecessarily ignore rm errors
For rm -f it's not an error if the files do not exist. If there's any
other error it's presumably a real issue, so avoid ignoring all errors.
Reviewed by: brooks, adrian
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D56714
build: Emit a warning for build targets run as root
Build targets should generally be run as an unprivileged user. Even
though building as root is discouraged many users do so, so just start
with a warning.
Reviewed by: brooks
Differential Revision: https://reviews.freebsd.org/D50352
Makefile.inc1: Update comment wrt world build targets
The utility targets described by this comment are in fact related to
building (buildworld), not installing (which is included in
`make world`).
Reviewed by: brooks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D56715
x86: Add external retpoline thunk
This allows use of -mindirect-branch=thunk-extern, and is only a few
bytes of dead code if not used.
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D60524
makefs/zfs: count "." in the link count and size of dataset roots
The root directory of a dataset is populated from an fsnode that is the
"." entry of the staging directory, and its children are the siblings of
that node, so the loop that computes the link count and the size of the
directory (which expects "." among the children, as the nodes of the
other directories have) never counts it. The link count of the root of
every dataset is one less than it should be (1 for an empty dataset
instead of 2, 19 instead of 20 for a root with 18 subdirectories), and
so is its size.
fts(3) trusts the link count of the directories of ZFS when called with
FTS_NOSTAT and FTS_PHYSICAL: it stops looking for subdirectories once it
has seen as many as the link count says, and does not descend into the
ones it did not look at. As a result find(1), and rm(1) when it does
not need to stat the entries, silently skip directories of a pool made
by makefs. On a root filesystem made by makefs, find / does not list
/etc at all.
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