一种eos3.0升级到eos4.x的的方法

ubuntu@VM-0-7-ubuntu:~/eos$ rm -rf build/
ubuntu@VM-0-7-ubuntu:~/eos$ ls
circle.yml  debian    eos.doxygen.in  HEADER       mesh.dot                README.md  star.dot       testnet.template
 CMakeLists.txt Docker    eosio_build.sh  Jenkinsfile  mesh.png    ring.dot   star.png       tests
CMakeModules    docs      eos-logo.png    libraries    plugins   ring.png   testnet-diagrams.sh  tools
contracts   Doxyfile  externals   LICENSE.txt  programs  scripts    testnet.md
ubuntu@VM-0-7-ubuntu:~/eos$ git submodule update --init --recursive
ubuntu@VM-0-7-ubuntu:~/eos$ git pull
remote: Counting objects: 28711, done.
remote: Compressing objects: 100% (20/20), done.
remote: Total 28711 (delta 3661), reused 3668 (delta 3656), pack-    reused 25035
Receiving objects: 100% (28711/28711), 21.99 MiB | 1.02 MiB/s, done.
Resolving deltas: 100% (26670/26670), completed with 448 local objects.
From https://github.com/eosio/eos

create mode 100644 unittests/special_accounts_tests.cpp
 create mode 100644 unittests/tic_tac_toe_tests.cpp
 create mode 100644 unittests/wasm_tests.cpp
ubuntu@VM-0-7-ubuntu:~/eos$ ls
circle.yml  debian    eos.doxygen.in      externals    libraries        plugins    ring.png  testnet-diagrams.sh  tools
CMakeLists.txt  Docker    eosio_build.sh      governance       LICENSE.txt  programs   scripts   testnet.md       tutorials
CMakeModules    docs      eos-logo.png        HEADER         mesh.dot   README.md  star.dot  testnet.template     unittests
contracts   Doxyfile  EXCHANGE_README.md  Jenkinsfile      mesh.png ring.dot   star.png  tests
ubuntu@VM-0-7-ubuntu:~/eos$ ./eosio_build.sh 

git submodules are not up to date.
Please run the command 'git submodule update --init --recursive'.
ubuntu@VM-0-7-ubuntu:~/eos$ git submodule update --init --    recursive
  Submodule path 'externals/binaryen': checked out     '579f3a099c286a45f58ea1ffc7bf671c415be0a6'
Submodule path 'libraries/appbase': checked out '50dc015b2f0e25c0cd01cf520245da23c0ed446b'
Submodule path 'libraries/chainbase': checked out 'b40a1ec99ee0eb16e28ee1c1a9577f1af7d48b84'
ubuntu@VM-0-7-ubuntu:~/eos$ ./eosio_build.sh 

Beginning build version: 1.2
Mon May 28 17:00:36 UTC 2018
User: ubuntu
git head id: 07a6798584d053ed6061bd892879c6c886ba104e
Current branch: master

ARCHITECTURE: Linux

OS name: Ubuntu
OS Version: 16.04
CPU speed: 2394.454Mhz
CPU cores: 2
Physical Memory: 7855 Mgb
Disk install: /dev/vda1
Disk space total: 49G
Disk space available: 36G

ubuntu@VM-0-7-ubuntu:~/eos$ cd build/contracts/
ubuntu@VM-0-7-ubuntu:~/eos/build/contracts$ make

 ubuntu@VM-0-7-ubuntu:~/eos$ ./eosio_build.sh 

  ubuntu@VM-0-7-ubuntu:~/eos$ cd build/
  ubuntu@VM-0-7-ubuntu:~/eos/build$ sudo make install

 export PATH=${HOME}/opt/mongodb/bin:$PATH
/usr/bin/mongod -f /home/ubuntu/opt/mongodb/mongod.conf &
cd /home/ubuntu/eos/build; make test