Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

usr.sbin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a p

usr.sbin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

config: drop dependency on libsbuf

Use an std::stringstream instead. get_word() and get_quoted_word() both
return a buffer that's presumed to not need release, so solve this by
returning a new spec

config: drop dependency on libsbuf

Use an std::stringstream instead. get_word() and get_quoted_word() both
return a buffer that's presumed to not need release, so solve this by
returning a new special configword type that holds a string or eof/eol
state. This cleans up caller checking for EOF/EOL to make it more
explicit what they're doing, at least in the EOL cases which previously
checked for NULL.

Sponsored by: Klara, Inc.
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D38276

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config: drop dependency on libnv

Compile mkmakefile.c as C++ instead and use an std::unordered_map to
accomplish the same goal.

Reviewed by: imp
Sponsored by: Klara, Inc.
Sponsored by: NetApp, Inc.

config: drop dependency on libnv

Compile mkmakefile.c as C++ instead and use an std::unordered_map to
accomplish the same goal.

Reviewed by: imp
Sponsored by: Klara, Inc.
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D38275

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Merge ^/head r352105 through r352307.

config: do not link against libl, it is not needed

MFC after: 3 days

config(8): Fix broken ABI

r336019 introduced ${SRCTOP}/sys to the include paths in order to pull in a
new sys/{c,}nv.h. This is wrong, because the build tree's ABI isn't
guaranteed to match what's r

config(8): Fix broken ABI

r336019 introduced ${SRCTOP}/sys to the include paths in order to pull in a
new sys/{c,}nv.h. This is wrong, because the build tree's ABI isn't
guaranteed to match what's running on the host system.

Fix instead by removing -I${SRCTOP}/sys and installing the libnv headers
with `make -C lib/libnv includes`... this may or may not get re-worked in
the future so that a userland lib isn't installing includes from sys/.

Reported by: bdrewery

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config(8): De-dupe hint/env vars within a single file

r335653 flipped the order in which hints/env files are concatenated to match
the order in which vars are processed by the kernel. This is the ot

config(8): De-dupe hint/env vars within a single file

r335653 flipped the order in which hints/env files are concatenated to match
the order in which vars are processed by the kernel. This is the other
hammer to drop.

Use nv(9) to de-dupe entries within a single `hint` or `env` file, using the
latest value specified for a key. This leaves some duplicates if a variable
is specified in multiple hint/env files or via `envvar` in a kernel config,
but the reversed order of concatenation (from r335653) makes this a
non-issue as the latest-specified version will be seen first.

This change also silently rewrote hint bits to use the same sanitization
process that ian@ wrote for r335642. To the kernel, hints and env vars are
basically the same thing through early boot, then get merged into the
dynamic environment once kmem becomes available and the dynamic environment
is created. They should be subjected to the same restrictions.

libnv has been added to -legacy for the time being to support the build of
config(8) with the new cnvlist API.

Tested with: universe (11 host & 12 host)
MFC after: 1 month

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Revert r336011,r336012 until I can competently test

Fix build after r336011

Add libnv to bootstrap-tools, use ${SRCTOP}/sys headers.

config(8): De-dupe hint/env vars within a single file

r335653 flipped the order in which hints/env files are concatenated to match
the order in which vars are processed by the kernel. This is the ot

config(8): De-dupe hint/env vars within a single file

r335653 flipped the order in which hints/env files are concatenated to match
the order in which vars are processed by the kernel. This is the other
hammer to drop.

Use nv(9) to de-dupe entries within a single `hint` or `env` file, using the
latest value specified for a key. This leaves some duplicates if a variable
is specified in multiple hint/env files or via `envvar` in a kernel config,
but the reversed order of concatenation (from r335653) makes this a
non-issue as the latest-specified version will be seen first.

This change also silently rewrote hint bits to use the same sanitization
process that ian@ wrote for r335642. To the kernel, hints and env vars are
basically the same thing through early boot, then get merged into the
dynamic environment once kmem becomes available and the dynamic environment
is created. They should be subjected to the same restrictions.

MFC after: 1 month

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Merge ^/head r307736 through r308146.

Allow config to be compiled from another source directory, such as one
for building tools. This boils down to replacing ${.CURDIR} with
${SRCDIR}, where the latter is the directory in which this make

Allow config to be compiled from another source directory, such as one
for building tools. This boils down to replacing ${.CURDIR} with
${SRCDIR}, where the latter is the directory in which this makefile
lives.

Also allow overriding where file2c comes from using ${FILE2C}.

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Merge sync of head

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

MFHead @ r275232

r274961 through r275075

Convert usr.sbin to LIBADD
Reduce overlinking

Merge from head

IFC @ r254014

IFC @253398

Merge fresh head.

Add the Clang specific -Wmissing-variable-declarations to WARNS=6.

This compiler flag enforces that that people either mark variables
static or use an external declarations for the variable, similar

Add the Clang specific -Wmissing-variable-declarations to WARNS=6.

This compiler flag enforces that that people either mark variables
static or use an external declarations for the variable, similar to how
-Wmissing-prototypes works for functions.

Due to the fact that Yacc/Lex generate code that cannot trivially be
changed to not warn because of this (lots of yy* variables), add a
NO_WMISSING_VARIABLE_DECLARATIONS that can be used to turn off this
specific compiler warning.

Announced on: toolchain@

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