Setting environment variables when running tests?

[Brooks Moses]

Hi, all -

Is it possible to define a DejaGnu test such that a particular
environment variable will be set when the test is run?

The context is that I'd like to adjust where GCC's profiling tests
store their output, and to do that I need to run the test executable
with the GCOV_PREFIX environment variable set.  I'd like to do that in
a general way by editing the test definitions to specify "run this
test program with this environment variable set", rather than by
special-casing a hack in my board file.

Thanks,
- Brooks