eos安装

阿里云国内站连接github有问题，clone5次都不成功。腾讯云也是。
建议在码云上将代码导入后再继续。
eos官方文档

EOS安装在CentOS7.6上
如何在UBUNTU虚拟机上编译EOS完成环境搭建？(含运行)
全面理解EOS——1.源码编译及运行

基本命令

git clone https://gitee.com/Gbeauty/eos --recursive
cd eos/scripts/
sudo ./eosio_build.sh

eos2.0版本不需要 这一步：（安装EOS

cd eos/build
sudo make install）

安装完成的显示：

[100%] Linking CXX executable wasm_spec_test
cd /root/eos1/eos/build/eosio-wasm-spec-tests/generated-tests && /root/opt/cmake-3.10.2/bin/cmake -E cmake_lin
make[2]: Leaving directory '/root/eos1/eos/build'
[100%] Built target wasm_spec_test
make[1]: Leaving directory '/root/eos1/eos/build'
/root/opt/cmake-3.10.2/bin/cmake -E cmake_progress_start /root/eos1/eos/build/CMakeFiles 0
 _______  _______  _______ _________ _______
(  ____ \(  ___  )(  ____   __   __ (  ___  )
| (    \/| (   ) || (    \/   ) (   | (   ) |
| (__    | |   | || (_____    | |   | |   | |
|  __)   | |   | |(_____  )   | |   | |   | |
| (      | |   | |      ) |   | |   | |   | |
| (____/\| (___) |/\____) |___) (___| (___) |
(_______/(_______)\_______)\_______/(_______)
=============================================
EOSIO has been successfully built. 2:14:59
You can now install using: /root/eos1/eos/scripts/eosio_install.sh
Uninstall with: /root/eos1/eos/scripts/eosio_uninstall.sh

If you wish to perform tests to ensure functional code:
cd /root/eos1/eos/scripts/../build && make test

EOSIO website: https://eos.io
EOSIO Telegram channel: https://t.me/EOSProject
EOSIO resources: https://eos.io/resources/
EOSIO Stack Exchange: https://eosio.stackexchange.com

环境要求：7g以上内存(可以修改配置），
(gcc版本6以上，不要使用最新版本（最好使用ubuntu，18.04版本为7. 另centos7.7自带4.8.5，升级比较麻烦）。）
安装gcc后的可用空间大于20g
Centos7系统设置软件源
CentOS 7.6 编译安装最新版本GCC 9.2.0 实录，gcc 9.2.0好像不能编译eos
CMake Error at CMakeLists.txt:5 (PROJECT): The CMAKE_C_COMPILER: cl is not a full path

4.5 【错误4】编译提示RAM空间不足

输入：

duncanwang@duncanwang:~/eos$ ./eosio_build.sh

错误提示：

    Beginning build version: 1.2
    Wed Jun 27 10:24:48 UTC 2018
    User: duncanwang
cat: .git/refs/heads/master: No such file or directory
    git head id: 
    Current branch: HEAD

    ARCHITECTURE: Linux

    OS name: Ubuntu
    OS Version: 18.04
    CPU speed: 3192.622Mhz
    CPU cores: 2
    Physical Memory: 974 Mgb
    Disk install: /dev/sda2
    Disk space total: 19G
    Disk space available: 13G
    Your system must have 7 or more Gigabytes of physical memory installed.
    Exiting now.

解决方法：
进到eos/scripts/路径，修改对应的sh文件，找到“Your system must have 7 or more Gigabytes of physical memory installed”字样，或者You must have at least %sGB of available storage to install EOSIO，将后面的exit 1命令去掉即可。

 if [ "${MEM_MEG}" -lt 7000 ]; then
        printf "\\tYour system must have 7 or more Gigabytes of physical memory installed.\\n"
        printf "\\tExiting now.\\n"
  #     exit 1
    fi

顺道把硬盘不足的提示也注释掉，测试发现13G的空闲硬盘是可以编译成功的。

>   if [ "${DISK_AVAIL%.*}" -lt "${DISK_MIN}" ]; then
        printf "\\tYou must have at least %sGB of available storage to install EOSIO.\\n" "${DISK_MIN}"
        printf "\\tExiting now.\\n"
#       exit 1
    fi