I started build my own blockchain based on mastering bitcoin book using git on win7 and i have a problem I started learning how to build a blockchain from Antonopoulos book using Git Bash and i have a problem.
I used commands:
 git clone github.com/bitcoin/bitcoin.git
cd bitcoin
git tag
git checkout v0.11.2
and when i try to use command ./autogen.sh
on the screen appear information:
./autogen.sh: line 9: autoreconf: command not found.

Where is the problem? What i do wrong? i need some libraries?
I believe you have the same problem reported in the link bellow:

https://askubuntu.com/a/490839

Just try to install autoconf. The autoreconf come with it:

sudo apt-get install autoconf