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From: Namhyung Kim <namhyung@kernel.org>
To: linux-perf-users@vger.kernel.org, acme@kernel.org, 
 James Clark <james.clark@linaro.org>
Cc: irogers@google.com, Peter Zijlstra <peterz@infradead.org>, 
 Ingo Molnar <mingo@redhat.com>, Mark Rutland <mark.rutland@arm.com>, 
 Alexander Shishkin <alexander.shishkin@linux.intel.com>, 
 Jiri Olsa <jolsa@kernel.org>, Adrian Hunter <adrian.hunter@intel.com>, 
 Nathan Chancellor <nathan@kernel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@gmail.com>, 
 Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>, 
 Tianyou Li <tianyou.li@intel.com>, Thomas Falcon <thomas.falcon@intel.com>, 
 Zhiguo Zhou <zhiguo.zhou@intel.com>, Wangyang Guo <wangyang.guo@intel.com>, 
 Pan Deng <pan.deng@intel.com>, linux-kernel@vger.kernel.org, 
 llvm@lists.linux.dev
In-Reply-To: <20251022110241.1283519-1-james.clark@linaro.org>
References: <20251022110241.1283519-1-james.clark@linaro.org>
Subject: Re: [PATCH] perf annotate: Fix Clang build by adding block in
 switch case
Message-Id: <176133222994.3710582.4946257287449096710.b4-ty@kernel.org>
Date: Fri, 24 Oct 2025 11:57:09 -0700
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On Wed, 22 Oct 2025 12:02:40 +0100, James Clark wrote:
> Clang and GCC disagree with what constitutes a "declaration after
> statement". GCC allows declarations in switch cases without an extra
> block, as long as it's immediately after the label. Clang does not.
> Unfortunately this is the case even in the latest versions of both
> compilers. The only option that makes them behave in the same way is
> -Wpedantic, which can't be enabled in Perf because of the number of
> warnings it generates.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung