编译 EOS 1.8.0
EOSIO在昨晚发布了EOSIO v1.8.0，这个版本是共识升级版本，简单来讲，相当于STEEM的硬分叉。
这篇帖子只是简单记录一下编译的情况，升级过程将会单独开贴说明。
首先是编译参数的变化，多了个-P参数：
The build scripts now support an optional parameter (-P) which will try to pin the versions of the compiler, C++ standard library, Boost library, and a few other dependent libraries that could have an impact on the ability for nodeos to access the shared memory database created by prior versions.
更多细节请参考 EOSIO v1.8.0 Release Notes，我们来看一下支持的参数：
./scripts/eosio_build.sh -h
另外一点就是不同于之前的版本生成一堆乱七八糟的目录，这次会将依赖等内容统一放到一个目录内，默认为：$HOME/eosio/1.8/。这个目录可以用-i参数重新指定，但是我觉得没啥必要。
Both EOSIO and its dependencies will be built and installed by default in a sub-directory within the user's $HOME directory that includes the major and minor version numbers of the EOSIO release. For example, the build script in this release will default to installing everything into $HOME/eosio/1.8/
我使用了-P参数进行编译，耗时有点久，大概编译了47分钟，编译完成后的提示图由之前的红色变成了白色，估计是一般红色都表示错误啥的，不过为何不改成绿色呢？
编译好了之后检查一下版本号：
nodeos --version
返回的是1.8.0版本哦，看来没编译错呢，哈哈。
EOS的这次共识升级（硬分叉）后会支持很多新的协议特性，具体大家看 EOSIO v1.8.0 Release Notes吧，然后就可以在上边跑Voice等应用啦。
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