OpenWRT firmware for routers
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Petr Štetiar cbbef976e2 build: dtc: Disable noisy warnings by default
While helping with review and build testing of a few 4.19 pull requests,
I've noticed, that dtc compiler in OpenWrt uses different options then
upstream kernel, which is leading to a very noisy output[1]. It wouldn't
be that bad per se, but a lot of such warnings aren't easily fixable so
I think, that we should follow what upstream does and simply ignore^W
silence those noisy warnings.

So this patch tries to syncs dtc compiler flags with upstream kernel
till version 4.19.13, disabling those warnings as they were added in
upstream kernel:

 v4.6-rc1-2-gbc55398 dtc: turn off dtc unit address warnings by default

  The newly added dtc warning to check DT unit-address without reg
  property and vice-versa generates lots of warnings. Turn off the check
  unless building with W=1 or W=2.

 v4.11-rc2-11-g8654cb8 dtc: update warning settings for new bus and node/property

  dtc gained new warnings checking PCI and simple buses, unit address
  formatting, and stricter node and property name checking. Disable the
  new dtc warnings by default as there are 1000s. As before, warnings are
  enabled with W=1 or W=2. The strict node and property name checks are a
  bit subjective, so they are only enabled for W=2.

 v4.16-rc3-9-g4fd98e3 scripts: turn off some new dtc warnings by default

  The latest dtc update adds some new noisy warnings, so turn them off by
  default. Disable 'avoid_unnecessary_addr_size' and 'alias_paths'. They
  can be re-enabled by building with 'W=1'.

 v4.17-rc1-27-g74656b6 kbuild: disable new dtc graph and unit-address warnings

  dtc gained some new warnings for OF graphs and unique unit addresses,
  but they are currently much too noisy. So turn off
  'graph_child_address', 'graph_port', and 'unique_unit_address' warnings
  by default. They can be enabled by building dtbs with W=1.

Build tested on imx6 and ath79 with 4.14 and 4.19.

1. https://github.com/openwrt/openwrt/pull/1694#issuecomment-450864335

Signed-off-by: Petr Štetiar <ynezz@true.cz>
5 years ago
.github build: Update README & github help 6 years ago
config brcm2708: boot-part feature integration 5 years ago
include build: dtc: Disable noisy warnings by default 5 years ago
package kernel: Build: Split kmod-regmap 5 years ago
scripts build: add a script for generating Linksys factory images 5 years ago
target mvebu: backport upstream fixes for armada 37xx 5 years ago
toolchain musl: improve crypt() size hack 5 years ago
tools tools: mktplinkfw2: add split-uboot layout 5 years ago
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 12 years ago
.gitignore .gitignore: add .project & .cproject for eclipse users 6 years ago
BSDmakefile add missing copyright header 18 years ago
Config.in merge: base: update base-files and basic config 7 years ago
LICENSE finally move buildroot-ng to trunk 8 years ago
Makefile build: Unset CDPATH to avoid problems 6 years ago
README build: README punctuation pendantry 6 years ago
feeds.conf.default feeds: switch git.lede-project.org URLs to git.openwrt.org 6 years ago
rules.mk librpc: remove package 5 years ago

README

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------

This is the buildsystem for the OpenWrt Linux distribution.

To build your own firmware you need a Linux, BSD or MacOSX system (case
sensitive filesystem required). Cygwin is unsupported because of the lack
of a case sensitive file system.

You need gcc, binutils, bzip2, flex, python, perl, make, find, grep, diff,
unzip, gawk, getopt, subversion, libz-dev and libc headers installed.

1. Run "./scripts/feeds update -a" to obtain all the latest package definitions
defined in feeds.conf / feeds.conf.default

2. Run "./scripts/feeds install -a" to install symlinks for all obtained
packages into package/feeds/

3. Run "make menuconfig" to select your preferred configuration for the
toolchain, target system & firmware packages.

4. Run "make" to build your firmware. This will download all sources, build
the cross-compile toolchain and then cross-compile the Linux kernel & all
chosen applications for your target system.

Sunshine!
	Your OpenWrt Community
	http://www.openwrt.org