[Ethereum] Can’t install solc on Mac OS X

go-ethereuminstallationmac-osxsolc

I can't install solc on Mac OS X. I have tried the following:

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.

When I go back to geth, and I run

> eth.getCompilers()
[""]

When I tried to setSolc the following happened

> 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

I have tried following the directions here but it gets stuck at 

brew install llvm --HEAD --with-clang

EDIT: Including contents of package.json from solc in Mac.

{
  "_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"
}

Any ideas?

Best Answer

I wasn't familiar with NPM, so had some similar issues. Simply running npm install solc will attempt to install locally, which can present some permission and linking issues- this is likely the cause of the problem.

Instead, install solC globally by using $ npm install -g solc (you may also want to try $ npm install solc --global as I'm not sure which of these two commands fixed my issue).

If this is installed, check where it's been installed by running $ which solcjs which should yield something like /usr/local/bin/solcjs

I found that I needed to also use Homebrew to install/build solC, following the installation instructions. Once Brew was done, I checked that solC was installed with $ which sol.

Copy this directory, then once you've launched geth console use it in the setSolc command, like > admin.setSolc("/usr/local/bin/solc")

With luck, you'll get a confirmation message, and the next time your run > eth.getCompilers() the result should be something like ["Solidity"]

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