解决办法：
在clone时将github.com替换为github.com.cnpmjs.org或git.sdut.me
速度变得飞快。
方法转载于https://blog.csdn.net/weixin_42886104/article/details/106454331?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.control&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.control
错误原因忘了，也没有具体的提示
解决办法：
转载于：https://blog.csdn.net/jun626/article/details/104870430
错误形式应该全是某个目录下的文件，而且没有错误原因提示
进入对应文件夹
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >>lib/stdio-impl.h
问题解决，继续正常编译
make[7]: *** [Makefile:1910: freadahead.o] Error 1
make[7]: Leaving directory '/openwrt/bpi-r2_lede/build_dir/host/m4-1.4.18/lib'
make[6]: *** [Makefile:1674: all] Error 2
make[6]: Leaving directory '/openwrt/bpi-r2_lede/build_dir/host/m4-1.4.18/lib'
make[5]: *** [Makefile:1572: all-recursive] Error 1
make[5]: Leaving directory '/openwrt/bpi-r2_lede/build_dir/host/m4-1.4.18'
make[4]: *** [Makefile:1528: all] Error 2
make[4]: Leaving directory '/openwrt/bpi-r2_lede/build_dir/host/m4-1.4.18'
make[3]: *** [Makefile:29: /openwrt/bpi-r2_lede/build_dir/host/m4-1.4.18/.built] Error 2
make[3]: Leaving directory '/openwrt/bpi-r2_lede/tools/m4'
make[2]: *** [tools/Makefile:150: tools/m4/compile] Error 2
make[2]: Leaving directory '/openwrt/bpi-r2_lede'
make[1]: *** [tools/Makefile:146: /openwrt/bpi-r2_lede/staging_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/stamp/.tools_compile_yynyyyyynyyyyynyynnyyyynyyyyyyyyyyyyyyynyynynnyyynny] Error 2
make[1]: Leaving directory '/openwrt/bpi-r2_lede'
make: *** [/openwrt/bpi-r2_lede/include/toplevel.mk:209：world] 错误 2
WARNING: No feed for package 'libc' found, maybe it's already part of the standard packages?
WARNING: No feed for package 'libssp' found, maybe it's already part of the standard packages?
WARNING: No feed for package 'librt' found, maybe it's already part of the standard packages?
WARNING: No feed for package 'libpthread' found, maybe it's already part of the standard packages?
WARNING: No feed for package 'libpthread' found, maybe it's already part of the standard packages?
解决办法：安装libssh-dev。