linux-kernel - [PATCH 0/6] tools: Fix rtla and rv problems (found) with clang

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Date: Tue,  6 Feb 2024 12:05:28 +0100
From: Daniel Bristot de Oliveira <bristot@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Donald Zickus <dzickus@...hat.com>,
	stable@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [PATCH 0/6] tools: Fix rtla and rv problems (found) with clang

RHEL people reported some errors when compiling rtla and rv with
clang. The command line used to compile the tools is:

$ make HOSTCC=clang CC=clang LLVM_IAS=1

The first problem is two unsupported flags passed to the compiler:
-ffat-lto-objects and -Wno-maybe-uninitialized. They will be
removed if the compile is clang.

Also, the clang linker does not automatically recognize the
-flto=auto option used at compilation time, so it is explicitly
set.

With the compiler working, it starts pointing to some warnings
and errors about uninitialized variables, variable size, and an
unused function. These problems are also fixed.


Daniel Bristot de Oliveira (6):
  tools/rtla: Fix Makefile compiler options for clang
  tools/rtla: Fix uninitialized bucket/data->bucket_size warning
  tools/rtla: Fix clang warning about mount_point var size
  tools/rtla: Remove unused sched_getattr() function
  tools/rv: Fix Makefile compiler options for clang
  tools/rv: Fix curr_reactor uninitialized variable

 tools/tracing/rtla/Makefile            | 7 ++++++-
 tools/tracing/rtla/src/osnoise_hist.c  | 3 +--
 tools/tracing/rtla/src/timerlat_hist.c | 3 +--
 tools/tracing/rtla/src/utils.c         | 8 +-------
 tools/verification/rv/Makefile         | 7 ++++++-
 tools/verification/rv/src/in_kernel.c  | 2 +-
 6 files changed, 16 insertions(+), 14 deletions(-)

-- 
2.43.0