forgot to remove Scout/Tools.cpp from this CMakeLists.txt
(it is now in (Scout/CMakeLists.txt)

Duplicate files like X.cpp Scout/X.cpp were causing warnings like:

warning: .o file "/Users/dpx/workspace/scout/build/tools/clang/scc/../../../lib/libclangDriver.a(Tools.cpp.o)" more recent than executable timestamp in "/Users/dpx/workspace/scout/build/bin/scc-3.5"

warning: Could not open OSO file /Users/dpx/workspace/scout/build/tools/clang/scc/../../../lib/libclangDriver.a(Tools.cpp.o) to scan for pubtypes for objfile /Users/dpx/workspace/scout/build/bin/scc-3.5

in gdb.

You can track stuff down loke this using: nm -ap ../../build/bin/scc | grep OSO