Executable does not run on CircleCI

[jschmid]

This is most likely related to an issue in SwiftGen: SwiftGen/SwiftGen#35

The machines on CircleCI have Xcode installed at a path different than the regular one.

When running, the executable does not find some libs an fails. You can see an output here. I don't know exactly what did @AliSoftware to fix it, but I guess the same fix will apply here.

[AliSoftware]

What I did to fix it is that I simply copied the Swift runtime dylibs alongside my binary, using xcrun install-stdlib-tool, then removed Xcode.app from my executable @rpath and add the relative path to the Swift runtime dylibs I copied as @rpath instead.

See https://github.com/AliSoftware/SwiftGen/blob/master/Rakefile#L97-L101 + https://github.com/AliSoftware/SwiftGen/blob/master/Rakefile#L85

[jpsim]

Looks like the CircleCI VMs don't have write permissions in /usr/local/bin, so use brew install --prefix {writeable location}