linux/Documentation
Tiezhu Yang 628add78b0 bpf, docs: Update build procedure for manually compiling LLVM and Clang
The current LLVM and Clang build procedure in samples/bpf/README.rst is
out of date. See below that the links are not accessible any more.

  $ git clone http://llvm.org/git/llvm.git
  Cloning into 'llvm'...
  fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed
  $ git clone --depth 1 http://llvm.org/git/clang.git
  Cloning into 'clang'...
  fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed

The LLVM community has adopted new ways to build the compiler. There are
different ways to build LLVM and Clang, the Clang Getting Started page [1]
has one way. As Yonghong said, it is better to copy the build procedure
in Documentation/bpf/bpf_devel_QA.rst to keep consistent.

I verified the procedure and it is proved to be feasible, so we should
update README.rst to reflect the reality. At the same time, update the
related comment in Makefile.

Additionally, as Fangrui said, the dir llvm-project/llvm/build/install is
not used, BUILD_SHARED_LIBS=OFF is the default option [2], so also change
Documentation/bpf/bpf_devel_QA.rst together.

At last, we recommend that developers who want the fastest incremental
builds use the Ninja build system [1], you can find it in your system's
package manager, usually the package is ninja or ninja-build [3], so add
ninja to build dependencies suggested by Nathan.

  [1] https://clang.llvm.org/get_started.html
  [2] https://www.llvm.org/docs/CMake.html
  [3] https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Cc: Fangrui Song <maskray@google.com>
Link: https://lore.kernel.org/bpf/1611279584-26047-1-git-send-email-yangtiezhu@loongson.cn
2021-01-23 00:09:03 +01:00
..
ABI More power management updates for 5.11-rc1 2020-12-22 14:12:10 -08:00
accounting
admin-guide xen: branch for v5.11-rc4 2021-01-15 10:52:00 -08:00
arm ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
arm64 ARM: 2020-12-20 10:44:05 -08:00
block
bpf bpf, docs: Update build procedure for manually compiling LLVM and Clang 2021-01-23 00:09:03 +01:00
cdrom
core-api atomic: remove further references to atomic_ops 2020-12-31 15:51:33 -07:00
cpu-freq
crypto
dev-tools Merge branch 'akpm' (patches from Andrew) 2020-12-22 13:38:17 -08:00
devicetree dt-binding: net: ti: k3-am654-cpsw-nuss: update bindings for am64x cpsw3g 2021-01-19 17:32:34 -08:00
doc-guide Documentation: doc-guide: fixes to sphinx.rst 2020-12-31 15:49:51 -07:00
driver-api RTC for 5.11 2020-12-20 10:12:06 -08:00
fault-injection
fb
features ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
filesystems Various bug fixes and cleanups for ext4; no new features this cycle. 2020-12-24 14:16:02 -08:00
firmware_class
firmware-guide Documentation: ACPI: EINJ: Fix error type values for PCIe errors 2021-01-14 13:11:25 +01:00
fpga
gpu drm/docs: Fix todo.rst 2020-11-18 11:51:58 +01:00
hid Merge branch 'for-5.11/core' into for-linus 2020-12-16 11:38:38 +01:00
hwmon hwmon: (sbtsi_temp) Fix Documenation kernel-doc warning 2020-12-30 08:05:20 -08:00
i2c
ia64 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
ide
iio
infiniband
input Input: document inhibiting 2020-12-02 22:10:37 -08:00
isdn
kbuild Documentation: kbuild: Fix section reference 2021-01-11 05:14:38 +09:00
kernel-hacking docs: Fix reST markup when linking to sections 2020-12-31 15:44:47 -07:00
leds Changes for 5.11-rc1. Small cleanups/fixes mostly thanks to Marek, 2020-12-16 14:56:29 -08:00
litmus-tests
livepatch
locking Documentation: seqlock: s/LOCKTYPE/LOCKNAME/g 2020-12-09 17:08:49 +01:00
m68k docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
maintainer
mhi
mips docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
misc-devices
netlabel
networking docs: bpf: Clarify -mcpu=v3 requirement for atomic ops 2021-01-20 17:03:21 -08:00
nios2 docs: nios2: add missing ReST file 2020-12-07 08:35:21 -07:00
nvdimm
openrisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
parisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
PCI
pcmcia
power
powerpc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
process docs: remove mention of ENABLE_MUST_CHECK 2021-01-07 14:41:38 -07:00
RCU docs: Fix reST markup when linking to sections 2020-12-31 15:44:47 -07:00
riscv docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
s390 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
scheduler Power management updates for 5.11-rc1 2020-12-15 16:30:31 -08:00
scsi
security
sh docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sound sound fixes for 5.11-rc4 2021-01-13 11:55:14 -08:00
sparc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sphinx Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
sphinx-static
spi
staging
target tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
timers
trace Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
translations Networking updates for 5.11 2020-12-15 13:22:29 -08:00
usb
userspace-api "Intel SGX is new hardware functionality that can be used by 2020-12-14 13:14:57 -08:00
virt KVM/arm64 fixes for 5.11, take #1 2021-01-08 05:02:40 -05:00
vm mm/lru: revise the comments of lru_lock 2020-12-15 14:48:04 -08:00
w1
watchdog
x86 A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
xtensa A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
.gitignore
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py docs: Note that sphinx 1.7 will be required soon 2020-12-11 13:53:38 -07:00
COPYING-logo
docutils.conf
dontdiff
index.rst docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
Kconfig
logo.gif
Makefile
memory-barriers.txt
SubmittingPatches
watch_queue.rst