Commit Graph

3506 Commits

Author SHA1 Message Date
Dimitry Andric
7d4374f65f Turn MALLOC_PRODUCTION into a regular src.conf(5) option
For historical reasons, defining MALLOC_PRODUCTION in /etc/make.conf has
been used to turn off potentially expensive debug checks and statistics
gathering in the implementation of malloc(3).

It seems more consistent to turn this into a regular src.conf(5) option,
e.g. WITH_MALLOC_PRODUCTION / WITHOUT_MALLOC_PRODUCTION. This can then
be toggled similar to any other source build option, and turned on or
off by default for e.g. stable branches.

Reviewed by:	imp, #manpages
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D26337
2020-09-05 23:30:17 +00:00
John Baldwin
4d135bbd7f libifconfig now depends on libm due to usage of log10().
ld.bfd in particular requires -lm to come after libifconfig on the
command line when linking rescue.

Reviewed by:	freqlabs, adrian
Differential Revision:	https://reviews.freebsd.org/D26258
2020-09-02 22:10:08 +00:00
Andrew Turner
d14897f960 When CPUTYPE is an architecture name use -march
Allow architecture names to be passed in to the build system via CPUTYPE.
This allows the user to use values such as armv8.1-a or armv8-a+crc as
the CPUTYPE.

Sponsored by:	Innovate UK
2020-09-02 11:53:26 +00:00
John Baldwin
73fd212c81 Suppress -Wempty-body warnings in GCC 6.x and later.
libc++ in LLVM 11 uses an empty else clause in
include/c++/v1/__thread_support which triggers this warning.

Reviewed by:	dim, emaste
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D26257
2020-08-31 21:57:01 +00:00
Vincenzo Maffione
5c4f8d801c lib: add libnetmap
This changeset introduces the new libnetmap library for writing
netmap applications.
Before libnetmap, applications could either use the kernel API
directly (e.g. NIOCREGIF/NIOCCTRL) or the simple header-only-library
netmap_user.h (e.g. nm_open(), nm_close(), nm_mmap() etc.)

The new library offers more functionalities than netmap_user.h:
  - Support for complex netmap options, such as external memory
    allocators or per-buffer offsets. This opens the way to future
    extensions.
  - More flexibility in the netmap port bind options, such as
    non-numeric names for pipes, or the ability to specify the netmap
    allocator that must be used for a given port.
  - Automatic tracking of the netmap memory regions in use across the
    open ports.

At the moment there is no man page, but the libnetmap.h header file
has in-depth documentation.

Reviewed by:	hrs
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D26171
2020-08-28 20:03:54 +00:00
Ryan Moeller
40d0fd2875 libzfs: Add missing crypto dependency
libzfs_crypto.c uses PKCS5_PBKDF2_HMAC_SHA1 from libcrypto.

Reported by:	John Kennedy
Sponsored by:	iXsystems, Inc.
2020-08-27 13:05:41 +00:00
Alex Richardson
489377c0a4 Avoid recomputing COMPILER_/LINKER_ variables when set explicitly
I noticed that when we build libraries for a different ABI (in CheriBSD) we
were calling ${XCC}/${LD} --version for every directory. It turns out that
this was caused by bsd.compat.mk explicitly setting (X_)COMPILER variables
for that build stage and this stops the _can_export logic from working.
To fix this, we change the check to only set _can_export=no if the variable
is set and it is set to a different value than the cached value.
This noticeably speeds up the tree walk while building compat libraries.
During an upstream amd64 buildworld this also removes 8 --version calls.

Obtained from:	CheriBSD
Reviewed By:	brooks, emaste
Differential Revision: https://reviews.freebsd.org/D25986
2020-08-26 10:21:38 +00:00
Alex Richardson
2d6bee8f00 Fix builds that set LD=ld.lld after r364761
When using relative paths for the linker we have to transform the name
since clang does not like -fuse-ld=ld.lld and instead requires -fuse-ld=lld
(the same also applies for ld.bfd).
2020-08-26 09:19:44 +00:00
Alex Richardson
2b6ee34cf6 Pass -fuse-ld=/path/to/ld if ${LD} != "ld"
This is needed so that setting LD/XLD is not ignored when linking with $CC
instead of directly using $LD. Currently only clang accepts an absolute
path for -fuse-ld= (Clang 12+ will add a new --ld-path flag), so we now
warn when building with GCC and $LD != "ld" since that might result in the
wrong linker being used.

We have been setting XLD=/path/to/cheri/ld.lld in CheriBSD for a long time and
used a similar version of this patch to avoid linking with /usr/bin/ld.
This change is also required when building FreeBSD on an Ubuntu with Clang:
In that case we set XCC=/usr/lib/llvm-10/bin/clang and since
/usr/lib/llvm-10/bin/ does not contain a "ld" binary the build fails with
`clang: error: unable to execute command: Executable "ld" doesn't exist!`
unless we pass -fuse-ld=/usr/lib/llvm-10/bin/ld.lld.

This change passes -fuse-ld instead of copying ${XLD} to WOLRDTMP/bin/ld
since then we would have to ensure that this file does not exist while
building the bootstrap tools. The cross-linker might not be compatible with
the host linker (e.g. when building on macos: host-linker= Mach-O /usr/bin/ld,
cross-linker=LLVM ld.lld).

Reviewed By:	brooks, emaste
Differential Revision: https://reviews.freebsd.org/D26055
2020-08-25 13:30:03 +00:00
Matt Macy
9e5787d228 Merge OpenZFS support in to HEAD.
The primary benefit is maintaining a completely shared
code base with the community allowing FreeBSD to receive
new features sooner and with less effort.

I would advise against doing 'zpool upgrade'
or creating indispensable pools using new
features until this change has had a month+
to soak.

Work on merging FreeBSD support in to what was
at the time "ZFS on Linux" began in August 2018.
I first publicly proposed transitioning FreeBSD
to (new) OpenZFS on December 18th, 2018. FreeBSD
support in OpenZFS was finally completed in December
2019. A CFT for downstreaming OpenZFS support in
to FreeBSD was first issued on July 8th. All issues
that were reported have been addressed or, for
a couple of less critical matters there are
pull requests in progress with OpenZFS. iXsystems
has tested and dogfooded extensively internally.
The TrueNAS 12 release is based on OpenZFS with
some additional features that have not yet made
it upstream.

Improvements include:
  project quotas, encrypted datasets,
  allocation classes, vectorized raidz,
  vectorized checksums, various command line
  improvements, zstd compression.

Thanks to those who have helped along the way:
Ryan Moeller, Allan Jude, Zack Welch, and many
others.

Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D25872
2020-08-25 02:21:27 +00:00
Dimitry Andric
2a5220e12e After r364732, we can now enable MK_OPENMP for aarch64 by default.
PR:		248864
MFC after:	2 weeks
2020-08-24 20:40:26 +00:00
John Baldwin
e2ec07432d Move -L${LIBCOMPATTMP}/usr/lib${libcompat} from CFLAGS to LDFLAGS.
This is only needed when linking and fixes various "unused command
line argument" warnings during the lib32 build.

Reviewed by:	bdrewery
Obtained from:	CheriBSD
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D26068
2020-08-17 17:17:33 +00:00
Mariusz Zaborski
832dc76b63 libcasper: Introduce cap_net a network service for Casper.
Reviewed by:	emaste, markj (previous version), bcr (man page)
Differential Revision:	https://reviews.freebsd.org/D24688
2020-08-16 18:12:21 +00:00
Alex Richardson
01c4f3a763 Make bsd.linker.mk work with the MacOS linker
This is not strictly required for crossbuilding but having lots of warnings
from bsd.linker.mk in the output was making it hard to see the actual
warning messages.

Reviewed By:	imp
Differential Revision: https://reviews.freebsd.org/D14318
2020-08-13 14:14:51 +00:00
Alex Richardson
91b31c100b Allow linking the kernel with a linker that doesn't support -z ifunc-noplt
This can happen when linking with upstream LLD < 9.0.

Reviewed By:	markj
Differential Revision: https://reviews.freebsd.org/D25985
2020-08-11 16:47:00 +00:00
Alex Richardson
14267d398f Add CLANG/LLD/LLD to BROKEN_OPTIONS when building on non-FreeBSD
These tools require a bootstrap llvm-tblgen/clang-tblgen and that cannot
be built with the current make infrastructure: the config header is not
correct for Linux/macOS and we don't include the CMakeLists.txt in contrib
so we can't generate one that would be correct.

Reviewed By:	emaste, imp, dim
Differential Revision: https://reviews.freebsd.org/D14245
2020-08-11 16:46:43 +00:00
Alex Richardson
1a18ab420b Allow overriding the tool used for stripping binaries
Since the make variable STRIP is already used for other purposes, this
uses STRIPBIN (which is also used for the same purpose by install(1).
This allows using LLVM objcopy to strip binaries instead of the in-tree
elftoolchain objcopy. We make use of this in CheriBSD since passing
binaries generated by our toolchain to elftoolchain strip sometimes results
in assertion failures.

This allows working around https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248516
by specifying STRIPBIN=/path/to/llvm-strip

Obtained from:	CheriBSD
Reviewed By:	emaste, brooks
Differential Revision: https://reviews.freebsd.org/D25988
2020-08-11 16:46:27 +00:00
John Baldwin
776b260ae2 Disable errors for -Wsystem-headers for GCC on aarch64.
GCC's own arm_neon.h triggers multiple warnings on both GCC 6 and
GCC 9.

Differential Revision:	https://reviews.freebsd.org/D25729
2020-08-04 18:24:46 +00:00
John Baldwin
0ea6e5109d Disable errors for -Wredundant-decls for GCC 6+.
GCC triggers warnings for this that clang does not for duplicate
declarations of yylex().

Differential Revision:	https://reviews.freebsd.org/D25727
2020-08-04 18:20:39 +00:00
John Baldwin
a02fb76280 Turn off errors for -Wmaybe-uninitialized in GCC 6+.
Recent changes to <sys/tree.h> trigger this warning and seem like a
false positive.

Differential Revision:	https://reviews.freebsd.org/D25726
2020-08-04 18:19:29 +00:00
Kyle Evans
b4af4f93c6 gtest: link against libregex for GNU extensions
gtest tests want to use \w ([[:alnum:]]) at the very least, which was
causing them to fail after r363679.

Start linking against libregex so that this shorthand is implemented.

PR:		248452
2020-08-04 02:18:24 +00:00
Mitchell Horne
2192efc03b RISC-V boot1.efi and loader.efi support
This implementation doesn't have any major deviations from the other EFI
ports. I've copied the boilerplate from arm and arm64.

I've tested this with the following boot flows:
OpenSBI (M-mode) -> u-boot (S-mode) -> loader.efi -> FreeBSD
OpenSBI (M-mode) -> u-boot (S-mode) -> boot1.efi -> loader.efi -> FreeBSD

Due to the way that u-boot handles secondary CPUs, OpenSBI >= v0.7 is required,
as the HSM extension is needed to bring them up explicitly. Because of this,
using BBL as the SBI implementation will not be possible. Additionally, there
are a few recent u-boot changes that are required as well, all of which will be
present in the upcoming v2020.07 release.

Looks good:	emaste
Differential Revision:	https://reviews.freebsd.org/D25135
2020-07-06 18:19:42 +00:00
Stefan Eßer
252884ae7e Import new 2-clause BSD licenced implementation of the bc and dc commands
These implementations of the bc and dc programs offer a number of advantages
compared to the current implementations in the FreeBSD base system:

- They do not depend on external large number functions (i.e. no dependency
  on OpenSSL or any other large number library)

- They implements all features found in GNU bc/dc (with the exception of
  the forking of sub-processes, which the author of this version considers
  as a security issue).

- They are significantly faster than the current code in base (more than
  2 orders of magnitude in some of my tests, e.g. for 12345^100000).

- They should be fully compatible with all features and the behavior of the
  current implementations in FreeBSD (not formally verified).

- They support POSIX message catalogs and come with localized messages in
  Chinese, Dutch, English, French, German, Japanese, Polish, Portugueze,
  and Russian.

- They offer very detailed man-pages that provide far more information than
  the current ones.

The upstream sources contain a large number of tests, which are not
imported with this commit. They could be integrated into our test
framework at a latter time.

Installation of this version is controlled by the option "MK_GH_BC=yes".
This option will be set to yes by default in 13-CURRENT, but will be off
by default in 12-STABLE.

Approved by:	imp
Obtained from:	https://git.yzena.com/gavin/bc
MFC after:	4 weeks
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D19982
2020-06-27 12:02:01 +00:00
Conrad Meyer
0a9ab9f549 Add WITH_CLANG_FORMAT option
clang-format is enabled conditional on either WITH_CLANG_EXTRAS or
WITH_CLANG_FORMAT.  Some sources in libclang are build conditional on
either rule, and obviously the clang-format binary itself depends on the
rule.

clang-format could still use a manual page.

Reviewed by:	emaste
Differential Revision:	https://reviews.freebsd.org/D25427
2020-06-24 17:03:42 +00:00
Xin LI
65422c964a liblzma: Make liblzma use libmd implementation of SHA256.
MFC after:	2 weeks
PR:		200142
2020-06-20 21:32:07 +00:00
Ed Maste
74e8d41e0a Retire BINUTILS and BINUTILS_BOOTSTRAP options
As of r361857 all BINUTILS options are disabled by default - ports
have been changed to depend on binutils if they require GNU as, and
all base system assembly files have been switched to use Clang's
integrated assembler.

Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation
2020-06-07 00:07:21 +00:00
Ed Maste
18983e3b88 src.opts.mk: disable BINUTILS_BOOTSTRAP universally
As of r361853 skein_block_asm.S is assembled using Clang's integrated
assembler.

PR:		233611
Sponsored by:	The FreeBSD Foundation
2020-06-06 02:27:28 +00:00
Ed Maste
8e1e3e1c5d bsd.prog.mk: split MK_PIE test for clarity
And a comment explaining why PIE flags are disabled for static binaries.
2020-06-02 00:46:15 +00:00
Ed Maste
fd71da37d4 Disable BINUTILS by default on amd64
The retirement of obsolete binutils 2.17.50 has been in progress for
quite some time.  All tools other than GNU as were removed prior to this
commit, and it was built only on amd64 - installed as /usr/bin/as, and
used as a bootstrap tool.

The amd64 exp-run has completed and failures have now been addressed in
the individual ports, so disable it by default.

PR:		233611, 205250 [exp-run]
Sponsored by:	The FreeBSD Foundation
2020-05-30 16:12:00 +00:00
Ed Maste
24930a2b4a Disable BINUTILS by default on i386
The retirement of obsolete binutils 2.17.50 has been in progress for
quite some time.  All tools other than GNU as were removed prior to this
commit, and it was built only on two archs:

i386, installed as /usr/bin/as
amd64, installed as /usr/bin/as and as a bootstrap tool

The i386 exp-run has completed and failures have been addressed in the
individual ports, so disable it there.

PR:		233611, 205250 [exp-run]
Sponsored by:	The FreeBSD Foundation
2020-05-29 17:36:54 +00:00
Ed Maste
c5ea81f7a6 rename in-tree libevent v1 to libevent1
r316063 installed pf's embedded libevent as a private lib, with headers
in /usr/include/private/event.  Unfortunately we also have a copy of
libevent v2 included in ntp, which needed to be updated for compatibility
with OpenSSL 1.1.

As unadorned 'libevent' generally refers to libevent v2, be explicit that
this one is libevent v1.

Reviewed by:	vangyzen (earlier)
Differential Revision:	https://reviews.freebsd.org/D17275
2020-05-28 22:05:50 +00:00
Eric van Gyzen
824214da64 Revert part of r360964
ports/devel/linux_libusb builds FreeBSD libusb with GCC 4.8.5
from devel/linux-c7-devtools.  Restore the tests for older GCC
in bsd.sys.mk to accomodate such ports.

Reported by:	tijl
Sponsored by:	Dell EMC Isilon
2020-05-28 21:56:31 +00:00
Ed Maste
697b271da9 pkgbase: use -dev,-dbg instead of -development,-debug
-development is long and awkward, and is also inconsistent with prior art
from the Linux world, which uses -dev (Debian) or -devel (Red Hat).  Follow
the Debian convention, and similarly for debug info packages.

Also remove redundant pkgbase development tag from includes.  We already tag
include files with package=runtime,dev; there is no need to separately tag
them as dev.

Discussed with:	bapt
Reviewed by:	manu
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D24139
2020-05-20 19:45:22 +00:00
Eric van Gyzen
fac6dee9eb Remove tests for obsolete compilers in the build system
Assume gcc is at least 6.4, the oldest xtoolchain in the ports tree.
Assume clang is at least 6, which was in 11.2-RELEASE.  Drop conditions
for older compilers.

Reviewed by:	imp (earlier version), emaste, jhb
MFC after:	2 weeks
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D24802
2020-05-12 15:22:40 +00:00
Ed Maste
0e7fa9f96c src.opts.mk: update BINUTILS options and add comments
BINUTILS is needed only for ports, and will be disabled once the failing
ports are addressed (likely by growing a binutils dependency).

BINUTILS_BOOTSTRAP is needed only on amd64, for skein_block_asm.s. There
is no need to enable it on i386.

This will all be removed before FreeBSD 13.0.
2020-05-08 14:54:40 +00:00
Ed Maste
fe808290f0 src.opts.mk: with BINUTILS limited to as it is used on i386 and amd64 only 2020-05-06 18:40:52 +00:00
John Baldwin
483d953a86 Initial support for bhyve save and restore.
Save and restore (also known as suspend and resume) permits a snapshot
to be taken of a guest's state that can later be resumed.  In the
current implementation, bhyve(8) creates a UNIX domain socket that is
used by bhyvectl(8) to send a request to save a snapshot (and
optionally exit after the snapshot has been taken).  A snapshot
currently consists of two files: the first holds a copy of guest RAM,
and the second file holds other guest state such as vCPU register
values and device model state.

To resume a guest, bhyve(8) must be started with a matching pair of
command line arguments to instantiate the same set of device models as
well as a pointer to the saved snapshot.

While the current implementation is useful for several uses cases, it
has a few limitations.  The file format for saving the guest state is
tied to the ABI of internal bhyve structures and is not
self-describing (in that it does not communicate the set of device
models present in the system).  In addition, the state saved for some
device models closely matches the internal data structures which might
prove a challenge for compatibility of snapshot files across a range
of bhyve versions.  The file format also does not currently support
versioning of individual chunks of state.  As a result, the current
file format is not a fixed binary format and future revisions to save
and restore will break binary compatiblity of snapshot files.  The
goal is to move to a more flexible format that adds versioning,
etc. and at that point to commit to providing a reasonable level of
compatibility.  As a result, the current implementation is not enabled
by default.  It can be enabled via the WITH_BHYVE_SNAPSHOT=yes option
for userland builds, and the kernel option BHYVE_SHAPSHOT.

Submitted by:	Mihai Tiganus, Flavius Anton, Darius Mihai
Submitted by:	Elena Mihailescu, Mihai Carabas, Sergiu Weisz
Relnotes:	yes
Sponsored by:	University Politehnica of Bucharest
Sponsored by:	Matthew Grooms (student scholarships)
Sponsored by:	iXsystems
Differential Revision:	https://reviews.freebsd.org/D19495
2020-05-05 00:02:04 +00:00
John Baldwin
371f3da616 Remove the SYMVER build option.
This option was added as a transition aide when symbol versioning was
first added.  It was enabled by default in 2007 and is supported even
by the old GPLv2 binutils.  Trying to disable it currently fails to
build in libc and at this point it isn't worth fixing the build.

Reported by:	Michael Dexter
Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D24637
2020-04-30 22:08:40 +00:00
Ed Maste
5ffef74b16 src.opts.mk: add WITHOUT_OPENSSL dependencies
A number of components require OpenSSL and fail to build if it is not
enabled.  As a first phase force these off under WITHOUT_OPENSSL.  A
second phase should make these more fine-grained, allowing the component
to build but without OpenSSL.

PR:		245931
Sponsored by:	The FreeBSD Foundation
2020-04-30 18:11:56 +00:00
Cy Schubert
12de77b3db Due to popular demand, revert r360102.
Reported by:	many
2020-04-19 21:38:03 +00:00
Cy Schubert
4574585e8f Conditionally install Kerberos rc files based on MK_KERBEROS_SCRIPTS
instead of MK_KERBEROS. The reason for this change is some users
prefer to build FreeBSD WITHOUT_KERBEROS, wanting to retain the
Kerberos rc scripts to start/stop MIT Kerberos or Heimdal from ports.

PR:		197337
Reported by:	Adam McDougall <ebay at looksharp.net>
Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D24252
2020-04-19 17:01:21 +00:00
Alan Somers
72a600a7a1 libauditd: make it a PRIVATELIB
According to the upstream man page (which we don't install), none of
libauditd's symbols are intended to be public. Also, I can't find any
evidence for a port that uses libauditd. Therefore, we should treat it like
other such libraries and use PRIVATELIB.

Reported by:	phk
Reviewed by:	cem, emaste
MFC after:	2 weeks
2020-04-19 02:20:39 +00:00
Kyle Evans
879ce458f4 userland build: replace -fno-common with ${CFCOMMONFLAG}
This change allows any downstream or otherwise consumer to easily override
the new -fno-common default on a temporary basis without having to hack into
src.sys.mk, and also makes it a bit easier to search for these specific
cases where -fno-common must be overridden with -fcommon or else the build
will fail.

The gdb build, the only program requiring -fcommon on head/, is switched
over as an example usage. It will need it on all branches, so this does not
harm future mergability.

MFC after:	3 days
2020-04-10 14:01:07 +00:00
Xin LI
f5b7695d2d Always install backward compatibility timezones, as they are installed
on all major Linux distributions as well as NetBSD and OpenBSD.

Remove the undocumented ZONEINFO_OLD_TIMEZONES_SUPPORT and the deprecated
OLDTIMEZONES knobs as they are now the default.

Reviewed by:		ngie, rgrimes
MFC after:		2 weeks
Differential Revision:	https://reviews.freebsd.org/D24306
2020-04-09 05:11:18 +00:00
Bryan Drewery
33ae1ff723 NO_OBJ: Always fix .OBJDIR regardless of AUTO_OBJ.
Sponsored by:	Dell EMC
MFC after:	2 weeks
2020-04-07 17:07:04 +00:00
Kyle Evans
8eb1a0ce56 Add -fno-common to all userland/kernel src builds
-fno-common will become the default in GCC10/LLVM11. Plenty of work has been
put in to make sure our world builds are no -fno-common clean, so let's slap
the build with this until it becomes the compiler default to ensure we don't
regress.

At this time, we will not be enforcing -fno-common on ports builds. I
suspect most ports will be or quickly become -fno-common clean as they're
naturally built against compilers that default to it, so this will hopefully
become a non-issue in due time. The exception to this, which is actually the
status quo, is that kmods built from ports will continue to build with
-fno-common.

As of the time of writing, I intend to also make stable/12 -fno-common
clean. What's been done will be MFC'd to stable/11 if it's easily applicable
and/or not much work to massage it into being functional, but I anticipate
adding -fcommon to stable/11 builds to maintain its ability to be built with
newer compilers for the rest of its lifetime instead of putting in a third
branch's worth of effort.
2020-04-07 17:04:24 +00:00
Kyle Evans
cddd13a4f4 Fix port/kernel builds after r359681
Submitted by:	bdrewery
Reported by:	bdrewery, sobomax, antoine
2020-04-07 15:10:04 +00:00
Maxim Sobolev
a8b8edb25e Normalize deployment tools usage and definitions by putting into one place
instead of sprinkling them out over many disjoint files. This is a follow-up
to achieve the same goal in an incomplete rev.348521.

Approved by:	imp
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D20520
2020-04-07 02:46:22 +00:00
Brooks Davis
f382bac49b Fix compilation with upstream clang builtin headers.
By using -nobuiltininc and adding the clang builtin headers resource dir
to the end of the compiler header search path, we can still find headers
such as immintrin.h but find the FreeBSD version of stddef.h/stdarg.h/..
first.

This is a workaround until we are able to settle on and complete a plan
to harmonize guard macros with LLVM.  We've mostly worked out this on
FreeBSD systems by removing select headers from the installed set of
devel/llvm*, but that isn't a good solution for cross build.

Submitted by:	arichardson
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17002
2020-04-06 23:38:46 +00:00
Kyle Evans
147d7b567f llvm: add a build knob for enabling assertions
For head/, this will remain eternally default-on to maintain the status quo.
For stable/ branches, it should be flipped to default-off to maintain the
status quo.

There's value in being able to flip it one way or the other easily on head
or stable branches, whether you want to gain some performance back on head/
(for machines there's little chance you'll actually hit an assertion) or
potentially diagnose a problem with the version of llvm on an older branch.

Currently, stable branches get the CFLAGS+= -ndebug line uncommented; going
forward, they will instead have the default of LLVM_ASSERTIONS flipped.

Reviewed by:	dim, emaste, re (gjb)
MFC after:	1 week
MFC note:	flip the default of LLVM_ASSERTIONS
Differential Revision:	https://reviews.freebsd.org/D24264
2020-04-06 01:27:17 +00:00