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Running the test suite on Windows with Cygwin 1.7 and the COMPILER and EXECUTABLE variables set... (1) occasionally gives "a.exe Device or resource busy" (maybe a.exe was still running or was still locked by the compiler when the next step was started?), and (2) requires a "nosdosfilewarning" environment variable to suppress a warning message (and non-zero exit code)
In Cygwin 1.7, the gfortran executable is actually C:\cygwin\bin\gfortran-4.exe The warning message that is suppressed is "MS-DOS style path detected"
Fixed (worked around, anyway) in CVS