OpenWrt编译环境搭建

1. 基于Ubuntu 22.04，64bit的操作系统

2. 先clone仓库：

   git clone https://git.openwrt.org/openwrt/openwrt.git
   

   可能会比较久，取决于网络状况。笔者是23年Q4写的，此时openwrt已经为v23了。

   clone成功后，会在clone的路径下有openwrt的文件夹。

3. 进入文件夹：

   cd openwrt
   

   更新软件包：

   ./scripts/feed update
   ./scripts/feed install
   

   后续有需要，也可以手动再更新。

4. 生成配置文件：

   make defconfig
   

   这一步和电脑安装软件的情况有关。可能会有报错，此时需根据报错日志来判断安装软件，如：

   sudo apt-get install git
   

   建议有报错后再安装即可，没必要一次性安装推荐的所有软件，浪费电脑磁盘。

5. 进入定制页面：

   make menuconfig
   

   通过键盘的上下方向键选择机型，包括CPU等，通过空格键选中，保存并退出。

   如果有需要定制的package，也可以在这一步操作，如可以参考笔者的：

   OpenWrt源码编译新增项 - 付时凡 - 博客园 (cnblogs.com)

6. 编译：

   make -j4 V=sc
   

   • -j4表示使用4核编译，如果电脑的CPU比较强，则推荐，如果有更多的核，可以-j99，编译时会自动调整核心，不过单核的电脑，这个参数就没有意义了。当然，第一次编译，建议先不用该参数，先单核编译，出错率会少一些
   • V=sc表示输出更多的报错日志，方便debug，例如是否是download某些源文件失败等，如果是download失败，可能是国内网络环境受限，可通过报错日志中的URL等信息，手动下载对应的压缩包文件，放在dl目录下，然后重新编译即可

7. 附完整编译日志，笔者这里是编译时不带V=sc参数，芯片方案为高通的ipq40xx：

   make[2]: Entering directory '/home/ubuntu/openwrt/scripts/config'
   make[2]: 'conf' is up to date.
   make[2]: Leaving directory '/home/ubuntu/openwrt/scripts/config'
    make[1] world
    make[2] package/cleanup
    make[2] target/compile
    make[3] -C target/linux compile
    make[2] buildinfo
    make[2] package/compile
    make[3] diffconfig buildversion feedsversion
    make[3] -C package/libs/toolchain compile
    make[3] -C package/libs/libjson-c host-compile
    make[3] -C package/kernel/gpio-button-hotplug compile
    make[3] -C package/libs/ncurses host-compile
    make[3] -C package/system/fwtool host-compile
    make[3] -C package/system/usign host-compile
    make[3] -C package/system/openwrt-keyring compile
    make[3] -C feeds/luci/modules/luci-base host-compile
    make[3] -C package/libs/mbedtls compile
    make[3] -C package/utils/lua host-compile
    make[4] scripts/config/conf
    make[3] -C feeds/luci/contrib/package/csstidy host-compile
    make[3] -C package/libs/jansson compile
    make[3] -C package/libs/libmnl compile
    make[3] -C package/system/ca-certificates compile
    make[3] -C feeds/packages/libs/nghttp2 compile
    make[3] -C package/firmware/ath11k-firmware compile
    make[3] -C package/firmware/ipq-wifi compile
    make[3] -C package/firmware/wireless-regdb compile
    make[3] -C package/kernel/qca-ssdk compile
    make[3] -C package/network/services/dropbear compile
    make[3] -C package/libs/libpcap compile
    make[3] -C package/network/utils/linux-atm compile
    make[3] -C package/network/utils/resolveip compile
    make[3] -C package/libs/libsepol compile
    make[3] -C package/libs/musl-fts compile
    make[3] -C package/utils/e2fsprogs host-compile
    make[3] -C package/libs/libubox host-compile
    make[3] -C package/libs/libnl-tiny compile
    make[3] -C package/libs/libjson-c compile
    make[3] -C package/utils/lua compile
    make[3] -C package/firmware/linux-firmware compile
    make[3] -C package/libs/zlib compile
    make[3] -C package/system/fwtool compile
    make[3] -C package/system/ucert host-compile
    make[3] -C package/libs/libnftnl compile
    make[3] -C feeds/luci/protocols/luci-proto-ppp compile
    make[3] -C feeds/luci/themes/luci-theme-bootstrap compile
    make[3] -C feeds/luci/protocols/luci-proto-ipv6 compile
    make[3] -C feeds/luci/libs/luci-lib-ip compile
    make[3] -C feeds/luci/libs/luci-lib-jsonc compile
    make[3] -C feeds/luci/libs/luci-lib-nixio compile
    make[3] -C feeds/luci/themes/luci-theme-material compile
    make[3] -C feeds/packages/net/curl compile
    make[3] -C package/network/utils/iw compile
    make[3] -C package/libs/pcre2 compile
    make[3] -C package/system/opkg host-compile
    make[3] -C package/libs/libubox compile
    make[3] -C package/kernel/linux compile
    make[3] -C package/libs/ncurses compile
    make[3] -C package/utils/jsonfilter compile
    make[3] -C package/system/usign compile
    make[3] -C package/libs/ustream-ssl compile
    make[3] -C feeds/packages/admin/htop compile
    make[3] -C package/network/ipv6/odhcp6c compile
    make[3] -C package/system/mtd compile
    make[3] -C package/libs/libselinux compile
    make[3] -C package/system/urngd compile
    make[3] -C package/utils/busybox compile
    make[3] -C package/system/ubus compile
    make[3] -C package/system/uci compile
    make[3] -C package/utils/util-linux compile
    make[3] -C package/libs/uclient compile
    make[3] -C package/utils/ucode compile
    make[3] -C package/network/utils/iwinfo compile
    make[3] -C feeds/luci/contrib/package/ucode-mod-html compile
    make[3] -C feeds/packages/net/cgi-io compile
    make[3] -C package/network/services/uhttpd compile
    make[3] -C feeds/luci/contrib/package/ucode-mod-lua compile
    make[3] -C package/network/services/hostapd compile
    make[3] -C package/network/services/dnsmasq compile
    make[3] -C package/network/services/odhcpd compile
    make[3] -C package/utils/e2fsprogs compile
    make[3] -C package/network/config/netifd compile
    make[3] -C package/system/ubox compile
    make[3] -C package/utils/mtd-utils compile
    make[3] -C package/system/opkg compile
    make[3] -C package/network/utils/nftables compile
    make[3] -C feeds/luci/contrib/package/lucihttp compile
    make[3] -C package/system/rpcd compile
    make[3] -C feeds/luci/libs/luci-lib-base compile
    make[3] -C package/kernel/mac80211 compile
    make[3] -C package/system/urandom-seed compile
    make[3] -C package/system/fstools compile
    make[3] -C feeds/luci/applications/luci-app-opkg compile
    make[3] -C package/network/config/firewall4 compile
    make[3] -C feeds/luci/libs/rpcd-mod-luci compile
    make[3] -C feeds/luci/libs/rpcd-mod-rrdns compile
    make[3] -C package/system/procd compile
    make[3] -C package/base-files compile
    make[3] -C package/boot/uboot-envtools compile
    make[3] -C feeds/luci/applications/luci-app-firewall compile
    make[3] -C feeds/luci/modules/luci-base compile
    make[3] -C package/network/services/ppp compile
    make[3] -C feeds/luci/modules/luci-mod-network compile
    make[3] -C feeds/luci/modules/luci-mod-status compile
    make[3] -C feeds/luci/modules/luci-mod-system compile
    make[3] -C feeds/luci/modules/luci-lua-runtime compile
    make[3] -C feeds/luci/modules/luci-mod-admin-full compile
    make[3] -C feeds/luci/modules/luci-compat compile
    make[3] -C feeds/luci/libs/luci-lib-ipkg compile
    make[3] -C package/luci-theme-argon compile
    make[3] -C feeds/luci/collections/luci-light compile
    make[3] -C package/luci-app-argon-config compile
    make[3] -C feeds/luci/collections/luci compile
    make[3] -C package/kernel/qca-nss-dp compile
    make[2] package/install
    make[2] target/install
    make[3] -C target/linux install
    make[2] package/index
    make[2] json_overview_image_info
    make[2] checksum
   

   后续这些便是可选的编译目标，例如需要单独编译procd，则：

   make package/system/procd compile
   

8. 编译后的镜像文件在bin目录下，如笔者的为：

   bin/targets/ipq40xx/generic/
   

9. 说明下几个镜像：

   镜像	说明	备注
   initramfs-recovery.itb	itb固件，并且带initramfs，即可以进入uboot，直接通过加载该镜像启动，如：bootm xxx.initramfs-recovery.itb	通常可用于测试固件是否正常，此时uboot启动，并不会破坏原有的FW分区等数据
   squashfs-factory.ubi	带factory字样，一般会覆盖旧有的配置，如第一次刷机
   squashfs-sysupgrade.bin	即经过刷机后的可通过openwrt页面直接升级的FW	在刷机稳定后，通过此固件升级；如果已经是openwrt固件，即可直接通过web升级该固件

10. TBD