In my case: tplink_tl-wr741-v1 (4/32). Router used as internal Access Point + statistics (send to main router - collectd configuration). Image size:
3343115 - openwrt-ath79-tiny-tplink_tl-wr741-v1-squashfs-sysupgrade.bin
One change in luci dependency: feeds/luci/collections/luci/Makefile
remove "+ luci-firewall"
Linux version 4.14.107 (kofec@E5420Mint) (gcc version 7.4.0)
root@wr741NDv1:~# uptime
17:02:46 up 4 days, 14:14, load average: 0.00, 0.00, 0.00
root@wr741NDv1:~# free -h
total used free shared buff/cache available
Mem: 28036 14432 6900 52 6704 11260
Swap: 0 0 0
root@wr741NDv1:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 2.0M 2.0M 0 100% /rom
tmpfs 13.7M 52.0K 13.6M 0% /tmp
/dev/mtdblock4 640.0K 244.0K 396.0K 38% /overlay
overlayfs:/overlay 640.0K 244.0K 396.0K 38% /
tmpfs 512.0K 0 512.0K 0% /dev
CONFIG_TARGET_ath79=y
CONFIG_TARGET_ath79_tiny=y
CONFIG_TARGET_ath79_tiny_DEVICE_tplink_tl-wr741-v1=y
# CONFIG_ATH9K_UBNTHSR is not set
# CONFIG_BUSYBOX_DEFAULT_FEATURE_IPV6 is not set
# CONFIG_IPV6 is not set
# CONFIG_KERNEL_IPV6 is not set
CONFIG_PACKAGE_ATH_DYNACK=y
CONFIG_PACKAGE_collectd=y
CONFIG_PACKAGE_collectd-mod-cpu=y
CONFIG_PACKAGE_collectd-mod-interface=y
CONFIG_PACKAGE_collectd-mod-iwinfo=y
CONFIG_PACKAGE_collectd-mod-memory=y
CONFIG_PACKAGE_collectd-mod-network=y
CONFIG_PACKAGE_collectd-mod-ping=y
CONFIG_PACKAGE_collectd-mod-uptime=y
# CONFIG_PACKAGE_dnsmasq is not set
# CONFIG_PACKAGE_firewall is not set
# CONFIG_PACKAGE_iptables is not set
# CONFIG_PACKAGE_kmod-ipt-conntrack is not set
# CONFIG_PACKAGE_kmod-ipt-core is not set
# CONFIG_PACKAGE_kmod-ipt-nat is not set
# CONFIG_PACKAGE_kmod-ipt-offload is not set
# CONFIG_PACKAGE_kmod-nf-conntrack is not set
# CONFIG_PACKAGE_kmod-nf-flow is not set
# CONFIG_PACKAGE_kmod-nf-ipt is not set
# CONFIG_PACKAGE_kmod-nf-ipt6 is not set
# CONFIG_PACKAGE_kmod-nf-nat is not set
# CONFIG_PACKAGE_kmod-nf-reject is not set
# CONFIG_PACKAGE_kmod-ppp is not set
# CONFIG_PACKAGE_libip6tc is not set
CONFIG_PACKAGE_libiwinfo-lua=y
CONFIG_PACKAGE_libltdl=y
CONFIG_PACKAGE_liblua=y
CONFIG_PACKAGE_liblucihttp=y
CONFIG_PACKAGE_liblucihttp-lua=y
CONFIG_PACKAGE_liboping=y
CONFIG_PACKAGE_libubus-lua=y
CONFIG_PACKAGE_lua=y
CONFIG_PACKAGE_luci=y
CONFIG_PACKAGE_luci-app-opkg=y
CONFIG_PACKAGE_luci-app-watchcat=y
CONFIG_PACKAGE_luci-base=y
CONFIG_PACKAGE_luci-lib-ip=y
CONFIG_PACKAGE_luci-lib-jsonc=y
CONFIG_PACKAGE_luci-lib-nixio=y
CONFIG_PACKAGE_luci-mod-admin-full=y
CONFIG_PACKAGE_luci-mod-network=y
CONFIG_PACKAGE_luci-mod-status=y
CONFIG_PACKAGE_luci-mod-system=y
CONFIG_PACKAGE_luci-proto-ppp=y
CONFIG_PACKAGE_luci-theme-bootstrap=y
# CONFIG_PACKAGE_ppp is not set
CONFIG_PACKAGE_rpcd=y
CONFIG_PACKAGE_rpcd-mod-rrdns=y
CONFIG_PACKAGE_uhttpd=y
CONFIG_PACKAGE_watchcat=y
CONFIG_PACKAGE_zlib=y
CONFIG_PACKAGE_kmod-lib-crc-ccitt=y