
Add support for checking whether test case code can compile without warnings, by recompiling each successful test with -Werror. If the -Werror version doesn't pass, we bail out. This gives us the same level of visibility of warnings in test code as --enable-werror provides for the main compile. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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