XCode 3 environment variables

Hi everybody,

Working on a Mavericks with XCode 3.2.6 (for legacy reasons), I'm currently meeting a compilation issue. Years ago, I added an environment variable to the XCode source tree (in preferences). Later, I have removed it and added it somewhere else (say environment.plist).

Today, I need to change the value of this variable, so I changed it in my environment.plist. But when I now launch an XCode build, the old value of the variable is still used, instead of the new one! Just to be sure, I removed this variable from my environment.plist, and checked in a terminal this variable was not set anymore. A echo $MYVAR command prints an empty line in my terminal, so I'm sure this variable is not set.

When I launch my XCode build, I can see in the env (printed by xcodebuild) that this variable is still in use during the compilation phase, with the old value.

I tried an experiment: redeclare this var in my XCode source tree with a new value, and launch the build. The new value is used. I then remove this variable, and the new value remains present in the compilation env!

I tried looking at xcodebuild.plist, com.apple.XCode.plist and com.apple.dt.XCode.plist, where I still could find it (strangely!), but removing these references from these files didn't change anything.

So my question is: How could I get rid of this old variable? Is there somewhere else this variable could still be referenced? Where could I look for it?

And in bonus: Why this variable remains with its old value once I removed it from XCode source tree?

Thanks for any contributor.