I have an XCode workspace with several projects, each building a static library target. Each library with it's own test target.

I have created a scheme containing each of the 7 test targets each selected for build, test, run (7 targets in all)
(parralel building is disabled in this scheme.)

Checking out this workspace from git and running a manual xcodebuild and setting TEST_AFTER_BUILD completes the build successfully and runs the tests.

I have also configured a jenkins build for this same workspace and scheme.

Most of the targets build, but one generates compile errors when compiling the test target. The failures indicate redefinitions of objective c interfaces
indicating multiple inclusions of header files. Since these files are #imported and not #included there should be no multiple-inclusion. And as mentioned
in XCode or from a manual run of xcodebuild these errors are not appearing.

I am wondering whether there are some additional environment variables being set in the jenkins invocation?

or perhaps the mutiple target scheme is not supported?