The compiler failed to generate an executable file. (RuntimeError)

Question

I recently upgraded to OS Mountain Lion. A project I\'m working on requires gem sys-proctable as a dependency, but when I run bundle install I get:

Answer 1

Same problem occurred and I finally solved it. Here are the steps I followed:

• Xcode, Xcode CLT
• sudo xcodebuild -license
• sudo port upgrade outdated
• sudo port install apple-gcc42
• rvm reinstall 1.9.3 #important!

Really, I think just first,second and last steps required, but can not test it.

Answer 2

Because i am sure i will land here again.

My issue was that sudo xcodebuild -license does nothing actually and i had to manually start xcode to agree to their terms to get it working. What a glorious OS.

Answer 3

Be sure to open XCode after updates. I found that I had to open it and accept the new license agreement after a recent update of XCode via the App Store. Otherwise I received the "The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first."

Answer 4

Regarding Centos and Fedora.

You have to install development tools first.

which should be installed with

dnf install @development-tools

For more info see this https://stackoverflow.com/a/35303883/9003945

Answer 5

The following steps resolved the issue.

1. xcode-select install
2. sudo xcodebuild -license

Hope it helps someone.

Answer 6

You have to install the latest Xcode and Command Line Tools (inside Xcode). It's obviously something with your Xcode or PATH. What does which clang give?