Tinkering OpenWRT (17) : trouble shooting (build source code) target 'world' failed problem

I am trying to compile openwrt and got the following error:

include/toplevel.mk:216: recipe for target 'world' failed

I tried using 15.05 and checked out 18.06 (yes the head master is not newest 18.06) and I got the similar problem. Only the line number is sometimes different. After googling a loooooot, I found the simple solution.

$ make distclean
$ make clean

maybe also make defconfig

And $ make V=99

After over night...I found the image in bin/targets.


ref:
https://www.right.com.cn/forum/thread-186603-1-1.html
https://www.gargoyle-router.com/phpbb/viewtopic.php?t=8011&start=10

Tinkering OpenWRT (16) : openwrt Chaos Calmer Build dependency: Please install Git (git-core) >= 1.6.5

For some reason, I'd like to build my openwrt from 15.05 Chaos Calmer. But I ran into the following problem:

~/workspace/chaos_calmer$ make menuconfig 
Checking 'working-make'... ok.
Checking 'case-sensitive-fs'... ok.
Checking 'gcc'... ok.
Checking 'working-gcc'... ok.
Checking 'g++'... ok.
Checking 'working-g++'... ok.
Checking 'ncurses'... ok.
Checking 'zlib'... ok.
Checking 'libssl'... ok.
Checking 'tar'... ok.
Checking 'find'... ok.
Checking 'bash'... ok.
Checking 'patch'... ok.
Checking 'diff'... ok.
Checking 'cp'... ok.
Checking 'seq'... ok.
Checking 'awk'... ok.
Checking 'grep'... ok.
Checking 'getopt'... ok.
Checking 'stat'... ok.
Checking 'md5sum'... ok.
Checking 'unzip'... ok.
Checking 'bzip2'... ok.
Checking 'wget'... ok.
Checking 'perl'... ok.
Checking 'python'... ok.
Checking 'svn'... ok.
Checking 'git'... failed.
Checking 'file'... ok.
Checking 'openssl'... ok.
Checking 'ldconfig-stub'... ok.

Build dependency: Please install Git (git-core) >= 1.6.5

/home/boris/workspace/openWRT_build/openwrt_RPi/chaos_calmer/include/prereq.mk:12: recipe for target 'prereq' failed
Prerequisite check failed. Use FORCE=1 to override.
/home/boris/workspace/openWRT_build/openwrt_RPi/chaos_calmer/include/toplevel.mk:140: recipe for target 'staging_dir/host/.prereq-build' failed
make: *** [staging_dir/host/.prereq-build] Error 1

##########################################################################

Solution:

Step 1: Download the patch from here:

https://gitlab.labs.nic.cz/turris/openwrt/uploads/0673001b14ab1d1769604ff0ce7d8781/git-version-check-fix.patch

Step 2: put the patch file under the chaos calmer source code

Step 3: patch it

git apply git-version-check-fix.patch

ref:

https://forum.openwrt.org/t/solved-how-to-compile-15-05-release-build-dependency-please-install-git-git-core-1-6-5-message/11623/3

https://gitlab.labs.nic.cz/turris/openwrt/issues/56

https://github.com/spack/spack/issues/5329