Cygwin no longer has the //x notation to refer to drives. Now in the config tool we work around this by mounting a directory /ecos-x instead. However when running tests from the config tool, it still uses //x. Specifically host/tools/ecostest/common/eCosTest.cpp:CeCosTest::CygPath() needs fixing Easy for someone who can rebuild it :-).
Fixed for the eCos 2.0b1 release and in anonCVS. The configtool now uses /cygdrive notation to refer to logical drive letters when running eCos tests.