[SOLVED] XCode doesn't recognize environment variables

XCode doesn't recognize environment variables

I use the following script to run XCode (7.0.1 7A1001) on OSX Yosemite 10.10.5:

export FOO=bar #this should not be necessary, but just in case
launchctl setenv FOO bar #should make it visible to all GUI applications (=XCode)
open -a xcode

I then open a workspace with two projects: App1 and App2. In both projects I put $(HOME)/$(FOO) in the Header Search Paths field.

In App1 it is resolved to /Users/ohads/bar as expected.
In App2 it is resolved to /Users/ohads/ - note how the HOME variable is resolved, but the FOO variable is not.

What's going on here? Why the discrepancy? How can I make FOO work in App2 - is there some special flag or declaration I'm missing?

BTW, as if that's not weird enough, App1 works even when I only use export (as opposed to launchctl which is what one should use for GUI applications, seeing as export should only affect cash applications).

Solution

Looks like this has to do with new XCode 7 behavior. In order for XCode to use environment variables the following command must be issued:

$ defaults write com.apple.dt.Xcode UseSanitizedBuildSystemEnvironment -bool NO

Once this command is issued, both export and launchctl work (as per chepner's comment). I can only guess it was working in App1 because it was created in an older XCode version.