Changing defconfig

For Developers
1

Hi.

I want to make a change, so when starting from clean source (after git clone or after make distclean), when running make defconfig I could use different defaults (for example, I want to change the default target, add LUCI as default, ext).
I couldn't find, as in kernel sources, files that define the defconfig.
How do I change these defaults, so I won't have to enter menuconfig each time I start from scratch?

Thanks

2

Direct answer first, then how I handle it myself

include/toplevel.mk

     96 .config: ./scripts/config/conf $(if $(CONFIG_HAVE_DOT_CONFIG),,prepare-tmpinfo)
     97         @+if [ \! -e .config ] || ! grep CONFIG_HAVE_DOT_CONFIG .config >/dev/null; then \
     98                 [ -e $(HOME)/.openwrt/defconfig ] && cp $(HOME)/.openwrt/defconfig .config; \
     99                 $(_SINGLE)$(NO_TRACE_MAKE) menuconfig $(PREP_MK); \
    100         fi

Personally, I manage config and files in a git repo that, like the feeds, is managed independently of the main repo

cd path/to/openwrt
git init env
ln -s .config env/dot.config
ln -s files env/files

I think scripts/env was where I got the inspiration for this, and it works well for me (to the point of env actually being a git worktree across all of my build roots.

The only trick is to always cat to .config as cp will remove the link.

cat /dev/null > .config
cat env/config.local env/config.utils env/config.select.ar300m > .config

(where I keep "sections" of config tucked away in ./env/)

3

You could write a personal "seed" config containing only the needed packages selections & config changes, which file you can then expand with make defconfig or make menuconfig to a full .config

You can use ./scripts/diffconfig.sh to generate initial seed from the current .config, and you can then save it and prune it further.

I use the following seed file for R7800, which I always before a build copy as the new .config skeleton.

# Use "make defconfig" to expand this to a full .config
CONFIG_TARGET_ipq806x=y
CONFIG_TARGET_ipq806x_DEVICE_netgear_r7800=y
CONFIG_TARGET_BOARD="ipq806x"

# Per-package build logs in <buildroot>/logs
CONFIG_DEVEL=y
CONFIG_BUILD_LOG=y

# Debugging options (build gdbserver, include package debug)
CONFIG_PACKAGE_gdbserver=m
CONFIG_DEBUG=y

# Include package list in build
CONFIG_INCLUDE_CONFIG=y

# exfat is patented
CONFIG_BUILD_PATENTED=y

# Longer waiting for failsafe button push
CONFIG_IMAGEOPT=y
CONFIG_PREINITOPT=y
CONFIG_TARGET_PREINIT_TIMEOUT=5

# Busybox tweaks
CONFIG_BUSYBOX_CUSTOM=y
#CONFIG_BUSYBOX_CONFIG_DIFF=y
CONFIG_BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY=y
CONFIG_BUSYBOX_CONFIG_FEATURE_EDITING_SAVE_ON_EXIT=y
CONFIG_BUSYBOX_CONFIG_FEATURE_LESS_FLAGS=y
CONFIG_BUSYBOX_CONFIG_FEATURE_LESS_REGEXP=y
CONFIG_BUSYBOX_CONFIG_FEATURE_LESS_WINCH=y

## # Normal ath10k wifi firmware and driver instead of -ct
## CONFIG_PACKAGE_ath10k-firmware-qca9984=y
## # CONFIG_PACKAGE_ath10k-firmware-qca9984-ct is not set
## CONFIG_PACKAGE_kmod-ath10k=y
## # CONFIG_PACKAGE_kmod-ath10k-ct is not set

# Add-on programs
CONFIG_PACKAGE_htop=y
CONFIG_PACKAGE_nano=y
CONFIG_PACKAGE_ccrypt=y
CONFIG_PACKAGE_curl=y
CONFIG_LIBCURL_OPENSSL=y
#CONFIG_PACKAGE_vsftpd-tls=y
CONFIG_PACKAGE_wget=y
CONFIG_PACKAGE_patch=y
CONFIG_PACKAGE_diffutils=y
CONFIG_PACKAGE_tree=y
CONFIG_PACKAGE_irqbalance=y
CONFIG_DROPBEAR_ECC=y

# USB device mount & file systems support
CONFIG_PACKAGE_block-mount=y
CONFIG_PACKAGE_kmod-usb-storage=y
CONFIG_PACKAGE_kmod-fs-cifs=y
CONFIG_PACKAGE_kmod-fs-exfat=y
CONFIG_PACKAGE_libblkid=y
CONFIG_PACKAGE_kmod-fs-ext4=y
CONFIG_PACKAGE_kmod-fs-hfsplus=y
CONFIG_PACKAGE_kmod-fs-msdos=y
CONFIG_PACKAGE_kmod-fs-vfat=y
CONFIG_PACKAGE_ntfs-3g=y
CONFIG_PACKAGE_kmod-nls-cp1250=y
CONFIG_PACKAGE_kmod-nls-cp437=y
CONFIG_PACKAGE_kmod-nls-cp850=y
CONFIG_PACKAGE_kmod-nls-iso8859-1=y
CONFIG_PACKAGE_kmod-nls-iso8859-15=y
CONFIG_PACKAGE_kmod-nls-utf8=y

# IPv6 support
CONFIG_PACKAGE_6in4=y
CONFIG_PACKAGE_6to4=y
CONFIG_PACKAGE_6rd=y

# IPv6 NAT support (ip6tables NAT extensions, ipt-nat6 and nf-nat6 kmods)
CONFIG_PACKAGE_ip6tables-mod-nat=y

# WLAN/WPS support
CONFIG_PACKAGE_hostapd-utils=y
#CONFIG_WPA_MSG_MIN_PRIORITY=2
CONFIG_WPA_MSG_MIN_PRIORITY=4
CONFIG_PACKAGE_wpad-openssl=y
# CONFIG_PACKAGE_wpad-basic is not set

# SSL certificates
CONFIG_PACKAGE_ca-certificates=y

# Luci (SSL from OpenSSL)
CONFIG_PACKAGE_luci-ssl-openssl=y
CONFIG_PACKAGE_luci-mod-admin-full=y
CONFIG_PACKAGE_luci-app-commands=y
CONFIG_PACKAGE_luci-app-ddns=y
CONFIG_PACKAGE_luci-app-upnp=y
CONFIG_PACKAGE_luci-app-wol=y

# Luci statistics
CONFIG_PACKAGE_luci-app-statistics=y
CONFIG_PACKAGE_collectd-mod-conntrack=y
CONFIG_PACKAGE_collectd-mod-cpufreq=y
CONFIG_PACKAGE_collectd-mod-entropy=y
CONFIG_PACKAGE_collectd-mod-ping=y
CONFIG_PACKAGE_collectd-mod-thermal=y
CONFIG_PACKAGE_collectd-mod-uptime=y

# QoS selection - currently SQM
CONFIG_PACKAGE_luci-app-sqm=y

# Build luci-theme-material, default is still bootstrap
CONFIG_PACKAGE_luci-theme-material=y

# 3G USB dongle
CONFIG_PACKAGE_luci-proto-3g=y
CONFIG_PACKAGE_kmod-usb-serial=y
CONFIG_PACKAGE_kmod-usb-serial-wwan=y
CONFIG_PACKAGE_usb-modeswitch=y

# kernel support for tunnels, VPNs
CONFIG_PACKAGE_kmod-tun=y

# PPTP support
CONFIG_PACKAGE_luci-proto-ppp=y
CONFIG_PACKAGE_ppp-mod-pptp=y

# iptables add-on ipsec
CONFIG_PACKAGE_iptables-mod-ipsec=y

# Support for IETF BCP38
CONFIG_PACKAGE_luci-app-bcp38=y

# Adblock package with Luci support, initially disabled
CONFIG_PACKAGE_luci-app-adblock=y

# BanIP package with Luci support, initially disabled
CONFIG_PACKAGE_luci-app-banip=y

# nlbwmon app
CONFIG_PACKAGE_luci-app-nlbwmon=y

# chaoskey TRNG USB dongle
CONFIG_PACKAGE_kmod-chaoskey=y
2 Likes
4

Thanks for your reply.
I tried this method with LUCI stuff, but when I run the defconfig, all the LUCI stuff disappear from the final .config file.
What can be the reason?

5

Have you "updated" and "installed" the feeds?