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configure: Compile with -Wimplicit-fallthrough=2

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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>
This commit is contained in:
Thomas Huth 2020-12-11 16:24:26 +01:00
parent 61e21b05de
commit 0a2ebce92a
1 changed files with 1 additions and 0 deletions
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configure vendored
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@ -2023,6 +2023,7 @@ add_to warn_flags -Wempty-body
add_to warn_flags -Wnested-externs
add_to warn_flags -Wendif-labels
add_to warn_flags -Wexpansion-to-defined
add_to warn_flags -Wimplicit-fallthrough=2
nowarn_flags=
add_to nowarn_flags -Wno-initializer-overrides