无法在Mac上安装solc

Question

我无法在Mac上安装solc。我尝试了以下方法：

npm install solc 

/Users/punddalinni
└── solc@0.3.0-1 
npm WARN enoent ENOENT: no such file or directory, open '/Users/punddalinni/package.json'
npm WARN punddalinni No description
npm WARN punddalinni No repository field.
npm WARN punddalinni No README data
npm WARN punddalinni No license field.

当我回到geth，我跑

> eth.getCompilers()
[""]

当我尝试setSolc时，发生了以下情况

> admin.setSolc('/Users/punddalinni/node_modules/solc')
exec: "/Users/punddalinni/node_modules/solc": permission denied
    at InvalidResponse (<anonymous>:-81662:-57)
    at send (<anonymous>:-156322:-57)
    at setSolc (<anonymous>:-133322:-57)
    at <anonymous>:1:1

我试过遵循这里的指示，但它被卡住了

brew install llvm --HEAD --with-clang

编辑:包括来自Mac中solc的package.json内容。

{
  "_args": [
    [
      "solc",
      "/Users/punddalinni"
    ]
  ],
  "_from": "solc@latest",
  "_id": "solc@0.3.0-1",
  "_inCache": true,
  "_installable": true,
  "_location": "/solc",
  "_nodeVersion": "4.0.0",
  "_npmOperationalInternal": {
    "host": "packages-13-west.internal.npmjs.com",
    "tmp": "tmp/solc-0.3.0-1.tgz_1457892692634_0.5487515390850604"
  },
  "_npmUser": {
    "email": "d11e9@turkd.net",
    "name": "d11e9"
  },
  "_npmVersion": "3.3.2",
  "_phantomChildren": {},
  "_requested": {
    "name": "solc",
    "raw": "solc",
    "rawSpec": "",
    "scope": null,
    "spec": "latest",
    "type": "tag"
  },
  "_requiredBy": [
    "#USER"
  ],
  "_resolved": "https://registry.npmjs.org/solc/-/solc-0.3.0-1.tgz",
  "_shasum": "523e79db0c69070f91fcbf408e8c7d0c93be176c",
  "_shrinkwrap": null,
  "_spec": "solc",
  "_where": "/Users/punddalinni",
  "author": {
    "name": "chriseth"
  },
  "bugs": {
    "url": "https://github.com/chriseth/browser-solidity/issues"
  },
  "dependencies": {},
  "description": "Solidity compiler",
  "devDependencies": {},
  "directories": {},
  "dist": {
    "shasum": "523e79db0c69070f91fcbf408e8c7d0c93be176c",
    "tarball": "http://registry.npmjs.org/solc/-/solc-0.3.0-1.tgz"
  },
  "gitHead": "5ce686c8d33db78c8f1eb8e2318eefbc5151f0eb",
  "homepage": "https://github.com/chriseth/browser-solidity#readme",
  "keywords": [
    "compiler",
    "ethereum",
    "solidity"
  ],
  "license": "MIT",
  "main": "index.js",
  "maintainers": [
    {
      "name": "chriseth",
      "email": "c@ethdev.com"
    },
    {
      "name": "d11e9",
      "email": "d11e9@turkd.net"
    }
  ],
  "name": "solc",
  "optionalDependencies": {},
  "readme": "ERROR: No README data found!",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/chriseth/browser-solidity.git"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "version": "0.3.0-1"
}

有什么想法吗？

Answer 1

Ah...you使用这个错误。Web3教程没有反映出这一点，但是您在web3上使用构建自源代码编译器(这是web3假定的编译方式)和npm包(教程不围绕这两个包)进行编译的方式存在差异。为了进行编译，您需要按照Browser-solidity页面的说明进行操作：

https://github.com/chriseth/browser-solidity

节选：

var solc = require('solc');
var input = "contract x { function g() {} }";
var output = solc.compile(input, 1); // 1 activates the optimiser

for (var contractName in output.contracts) {
    // code and ABI that are needed by web3
    console.log(contractName + ': ' + output.contracts[contractName].bytecode);
    console.log(contractName + '; ' + JSON.parse( output.contracts[contractName].interface));
}