【技术教程】用Mac装eosio可能会遇到的两个问题

Mac上执行./eosio_build.sh，由于网络或Mac本身系统的问题，经常会出现两个问题
[h2]问题1： LLVM NOTFOUND[/h2]CMake Error at libraries/wasm-jit/Source/Runtime/CMakeLists.txt:26 (find_package):
Could not find a package configuration file provided by "LLVM" (requested
version 4.0) with any of the following names:

LLVMConfig.cmakellvm-config.cmake

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Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
"LLVM_DIR" to a directory containing one of the above files. If "LLVM"
provides a separate development package or SDK, be sure it has been
installed.
这是
解决方法：查找路径，移除，重装

find /usr -name LLVMConfig.cmake -print 2>/dev/null

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mac装eosio-1.jpeg然后

brew remove --force llvmrm -rf build/git submodule update --init --recursiveexport LLVM_DIR=/usr/local/Cellar/llvm\@4/4.0.1/lib/cmake./eosio_build.sh

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/dev/null ：在类Unix系统中，/dev/null，是一个特殊的设备文件，它丢弃一切写入其中的数据（但报告写入操作成功），读取它则会立即得到一个End Of File。

开发过程中，经常会有把一部分个公共库分离出来，是整个项目具有复用性和模块化，这就是git submodule的由来

git submodule update --init --recursive的动作是确保submodule被更新下载，并把路径注册在本地(register path)出来

在eos中submodule有以下一些
位于contracts下：
contracts/libc++/upstream
contracts/musl/upstream
位于externals下：
externals/binaryen
externals/magic_get
位于libaries下：
libraries/appbase
libraries/chainbase
libraries/fc
libraries/softfloat

EOShenzhen在未来的文章会讲解这些库的原理
[h2]问题 2: Boost_INCLUDE_DIR not found[/h2]

Make Error: The following variables are used in this project, but they are set to NOTFOUND.Please set them or make sure they are set and tested correctly in the CMake files:/Users/mac/Desktop/mainnet/eos/libraries/appbase/Boost_INCLUDE_DIR used as include directory in directory /Users/mac/Desktop/mainnet/eos/libraries/appbase/Users/mac/Desktop/mainnet/eos/libraries/chainbase/Boost_INCLUDE_DIR used as include directory in directory /Users/mac/Desktop/mainnet/eos/libraries/chainbase/Users/mac/Desktop/mainnet/eos/libraries/fc/Boost_INCLUDE_DIR used as include directory in directory /Users/mac/Desktop/mainnet/eos/libraries/fc/Users/mac/Desktop/mainnet/eos/tools/Boost_INCLUDE_DIR used as include directory in directory /Users/mac/Desktop/mainnet/eos/toolsBoost_INCLUDE_DIR (ADVANCED) used as include directory in directory /Users/mac/Desktop/mainnet/eos/contracts/proxy

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解决方法
解决思路和LLVM类似，即寻找到boost存储的路径，移除，并重装

find / -name boost

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mac装eosio-2.jpeg如果./eosio_build.sh在一次安装过程中由于网络或者系统的问题出现问题，可能会导致一系列的问题

history | grep boost

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可以执行

brew remove --force boostrm -rf /usr/local/Cellar/boostrm -rf /usr/local/include/boost

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将保存在Cellar和 include中的boost文件夹删除掉
成功信号

mac装eosio-3.jpeg
参考链接：
https://github.com/EOSIO/eos/issues/3786
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