configure: Compile with -Wimplicit-fallthrough=2
Coverity always complains about switch-case statements that fall through the next one when there is no comment in between - which could indicate a forgotten "break" statement. Instead of handling these issues after they have been committed, it would be better to avoid them in the build process already. Thus let's enable the -Wimplicit-fallthrough warning now. The "=2" level seems to be a good compromise between being too strict and too generic about the possible comments, so we'll start with "=2" for now. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Chen Qun <kuhn.chenqun@huawei.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20201211152426.350966-13-thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
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@ -2023,6 +2023,7 @@ add_to warn_flags -Wempty-body
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add_to warn_flags -Wnested-externs
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add_to warn_flags -Wnested-externs
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add_to warn_flags -Wendif-labels
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add_to warn_flags -Wendif-labels
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add_to warn_flags -Wexpansion-to-defined
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add_to warn_flags -Wexpansion-to-defined
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add_to warn_flags -Wimplicit-fallthrough=2
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nowarn_flags=
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nowarn_flags=
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add_to nowarn_flags -Wno-initializer-overrides
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add_to nowarn_flags -Wno-initializer-overrides
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