[libcamera-devel] [PATCH/RFC] meson: Remove -Wno-unused-parameter

Kieran Bingham kieran.bingham at ideasonboard.com
Tue Nov 19 14:35:41 CET 2019


Hi All,

On 18/11/2019 21:53, Jacopo Mondi wrote:
> Hi Laurent,
> 
> On Sat, Nov 09, 2019 at 11:31:35AM +0100, Jacopo Mondi wrote:
>> Hi Laurent,
>>
> 
> Sorry, I forgot to add my tag
> Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>
> 
> Thanks
>   j
> 
>> On Fri, Nov 08, 2019 at 09:42:27PM +0200, Laurent Pinchart wrote:
>>> Hello everybody,
>>>
>>> On Mon, Oct 28, 2019 at 12:35:44PM +0200, Laurent Pinchart wrote:
>>>> On Mon, Oct 28, 2019 at 09:32:14AM +0000, Kieran Bingham wrote:
>>>>> On 26/10/2019 22:38, Laurent Pinchart wrote:
>>>>>> We build libcamera with -Wno-unused-parameter and this doesn't cause
>>>>>> much issue internally. However, it prevents catching unused parameters
>>>>>> in inline functions defined in public headers. This can lead to
>>>>>> compilation warnings for applications compiled without
>>>>>> -Wno-unused-parameter.
>>>>>>
>>>>>> To catch those issues, remove -Wno-unused-parameter and fix all the
>>>>>> related warnings.
>>>>>
>>>>> What's your opinion on defining an unused(variable) (named otherwise if
>>>>> required) macro so that we can declare unused variables in the code
>>>>> base, and keep the function prototypes clean?
>>>>>
>>>>> i.e.
>>>>>
>>>>> #define unused(_x) (void)(_x)
>>>>>
>>>>>  ControlValue ControlValue::load(ByteStreamBuffer &b, ControlType type,
>>>>>                                 unsigned int count)
>>>>>  {
>>>>> +       unused(count);
>>>>> +
>>>>>         switch (type) {
>>>>>         case ControlTypeBool: {
>>>>>                 bool value;
>>>>>   ...
>>>>>  }
>>>>>
>>>>> I think something like that would allow cleaner function declarations,
>>>>> that do not need to be modified once someone actually uses the variable
>>>>> in question. Simply remove the 'unused' declaration ?
>>>>
>>>> I'm afraid I don't like that :-) First of all, compilers may not always
>>>> be fooled by that particular implementation, and we'll play a game of
>>>> whack-a-mole as new compiler versions are released. Then, removing the
>>>> variable name is specified by the C++ standard as the official way to
>>>> note that a variable is unused. I don't think we should use a different,
>>>> non-standard implementation.

For clarification - I fully agree that removing -Wno-unused-parameter is
a good thing. I'm very much a -Wall -Wextra -Werror kind of guy. Fix all
the warnings, before someone else has to, and don't cause warnings for
other people.


In terms of style, I am not fond of changing the function prototype, so
here's a last ditch effort of suggesting an alternate Unused()
definition type based on templates which I think should always work?
(Because the argument is used, but optimised out)


From: https://stackoverflow.com/a/39746834/3660427

template <typename T>
void Unused(T&& /*No name*/) { /*Empty*/ }

void func(int i)
{
   Unused(i); // Silent warning for unused variable
}


And that's purely because I believe it's cleaner to remove the Unused()
line when you want to then /use/ that variable rather than modify the
function prototype.

But - I'll not nack this patch based on that.

It's a shame that adding the name in via comments adds too many *'s though:

> -static int hal_open_legacy(const struct hw_module_t *module, const char *id,
> -			   uint32_t halVersion, struct hw_device_t **device)
> +static int hal_open_legacy(const struct hw_module_t * /*module*/,
> +			   const char * /*id*/, uint32_t /*halVersion*/,
> +			   struct hw_device_t ** /*device*/)

I fear the /*device*/ reduces readability (IMO), but if you believe this
is the best way to solve the topic, then:

Acked-by: Kieran Bingham <kieran.bingham at ideasonboard.com>




>>>>
>>>> This patch stems from a warning generated when compiling a small test
>>>> code against libcamera out of the libcamera source tree, without
>>>> -Wno-unused-parameter. It turns out we had a single issue in public
>>>> headers, so we will likely not introduce other such issues in the
>>>> headers very often. We could thus decide not to care about it and catch
>>>> the issues when they are reported. I however think there's value in
>>>> dropping the compiler option though (otherwise I wouldn't have sent this
>>>> patch in the first place :-)).
>>>
>>> Ping ? I'd like to reach a consensus on this and decide if we should
>>> drop the patch (and thus live with the small but real risk that
>>> applications that use -Wunused-parameters would get a build warning) or
>>> keep it, in this form or another.
>>>
>>
>> I think the priority here is to make sure applications do not get
>> warnings when building with -Wunused-parameters, so I'm finw with
>> either removing the parameter's name completely from the function
>> definition or commenting it out, which I like less but mostly because
>> of how it looks, so I'm fine with both, as long as we make sure
>> applications do not get warnings...
>>
>> Thanks
>>   j
>>
>>>>>> Fix an additional checkstyle.py error while at it.
>>>>>>
>>>>>> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>>>>>> ---
>>>>>>  meson.build                                |  1 -
>>>>>>  src/android/camera3_hal.cpp                |  9 +++++----
>>>>>>  src/android/camera_device.cpp              |  4 ++--
>>>>>>  src/android/camera_proxy.cpp               |  4 ++--
>>>>>>  src/cam/main.cpp                           |  2 +-
>>>>>>  src/ipa/ipa_vimc.cpp                       | 10 +++++-----
>>>>>>  src/ipa/rkisp1/rkisp1.cpp                  |  2 +-
>>>>>>  src/libcamera/device_enumerator_udev.cpp   |  2 +-
>>>>>>  src/libcamera/ipc_unixsocket.cpp           |  2 +-
>>>>>>  src/libcamera/pipeline/ipu3/ipu3.cpp       |  2 +-
>>>>>>  src/libcamera/pipeline/rkisp1/rkisp1.cpp   |  2 +-
>>>>>>  src/libcamera/pipeline/rkisp1/timeline.cpp |  2 +-
>>>>>>  src/libcamera/pipeline/uvcvideo.cpp        |  2 +-
>>>>>>  src/libcamera/pipeline/vimc.cpp            |  4 ++--
>>>>>>  src/libcamera/process.cpp                  |  2 +-
>>>>>>  src/libcamera/proxy/ipa_proxy_linux.cpp    | 12 ++++++------
>>>>>>  src/libcamera/v4l2_videodevice.cpp         |  2 +-
>>>>>>  src/qcam/main.cpp                          |  2 +-
>>>>>>  test/camera/capture.cpp                    |  2 +-
>>>>>>  test/libtest/test.h                        |  4 ++--
>>>>>>  test/log/log_process.cpp                   |  3 ++-
>>>>>>  test/message.cpp                           |  2 +-
>>>>>>  test/process/process_test.cpp              |  3 ++-
>>>>>>  test/timer-thread.cpp                      |  2 +-
>>>>>>  test/timer.cpp                             |  2 +-
>>>>>>  25 files changed, 43 insertions(+), 41 deletions(-)
>>>>>>
>>>>>> diff --git a/meson.build b/meson.build
>>>>>> index 72ad7c8b493b..19a921a8ba6a 100644
>>>>>> --- a/meson.build
>>>>>> +++ b/meson.build
>>>>>> @@ -31,7 +31,6 @@ if cc.has_header_symbol('stdlib.h', 'secure_getenv', prefix : '#define _GNU_SOUR
>>>>>>  endif
>>>>>>
>>>>>>  common_arguments = [
>>>>>> -    '-Wno-unused-parameter',
>>>>>>      '-include', 'config.h',
>>>>>>  ]
>>>>>>
>>>>>> diff --git a/src/android/camera3_hal.cpp b/src/android/camera3_hal.cpp
>>>>>> index 8d2629ca356c..a7f470172583 100644
>>>>>> --- a/src/android/camera3_hal.cpp
>>>>>> +++ b/src/android/camera3_hal.cpp
>>>>>> @@ -31,18 +31,19 @@ static int hal_get_camera_info(int id, struct camera_info *info)
>>>>>>  	return cameraManager.getCameraInfo(id, info);
>>>>>>  }
>>>>>>
>>>>>> -static int hal_set_callbacks(const camera_module_callbacks_t *callbacks)
>>>>>> +static int hal_set_callbacks(const camera_module_callbacks_t * /*callbacks*/)
>>>>>>  {
>>>>>>  	return 0;
>>>>>>  }
>>>>>>
>>>>>> -static int hal_open_legacy(const struct hw_module_t *module, const char *id,
>>>>>> -			   uint32_t halVersion, struct hw_device_t **device)
>>>>>> +static int hal_open_legacy(const struct hw_module_t * /*module*/,
>>>>>> +			   const char * /*id*/, uint32_t /*halVersion*/,
>>>>>> +			   struct hw_device_t ** /*device*/)
>>>>>>  {
>>>>>>  	return -ENOSYS;
>>>>>>  }
>>>>>>
>>>>>> -static int hal_set_torch_mode(const char *camera_id, bool enabled)
>>>>>> +static int hal_set_torch_mode(const char * /*camera_id*/, bool /*enabled*/)
>>>>>>  {
>>>>>>  	return -ENOSYS;
>>>>>>  }
>>>>>> diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
>>>>>> index c7c9b3fd1724..b0ba1cf0a921 100644
>>>>>> --- a/src/android/camera_device.cpp
>>>>>> +++ b/src/android/camera_device.cpp
>>>>>> @@ -49,7 +49,7 @@ CameraDevice::Camera3RequestDescriptor::~Camera3RequestDescriptor()
>>>>>>   * to the framework using the designated callbacks.
>>>>>>   */
>>>>>>
>>>>>> -CameraDevice::CameraDevice(unsigned int id, const std::shared_ptr<Camera> &camera)
>>>>>> +CameraDevice::CameraDevice(unsigned int /*id*/, const std::shared_ptr<Camera> &camera)
>>>>>>  	: running_(false), camera_(camera), staticMetadata_(nullptr)
>>>>>>  {
>>>>>>  	camera_->requestCompleted.connect(this, &CameraDevice::requestComplete);
>>>>>> @@ -875,7 +875,7 @@ void CameraDevice::notifyError(uint32_t frameNumber, camera3_stream_t *stream)
>>>>>>  /*
>>>>>>   * Produce a set of fixed result metadata.
>>>>>>   */
>>>>>> -std::unique_ptr<CameraMetadata> CameraDevice::getResultMetadata(int frame_number,
>>>>>> +std::unique_ptr<CameraMetadata> CameraDevice::getResultMetadata(int /*frame_number*/,
>>>>>>  								int64_t timestamp)
>>>>>>  {
>>>>>>  	/*
>>>>>> diff --git a/src/android/camera_proxy.cpp b/src/android/camera_proxy.cpp
>>>>>> index 4f5c0a024903..c9f98c784eec 100644
>>>>>> --- a/src/android/camera_proxy.cpp
>>>>>> +++ b/src/android/camera_proxy.cpp
>>>>>> @@ -79,11 +79,11 @@ static int hal_dev_process_capture_request(const struct camera3_device *dev,
>>>>>>  	return proxy->processCaptureRequest(request);
>>>>>>  }
>>>>>>
>>>>>> -static void hal_dev_dump(const struct camera3_device *dev, int fd)
>>>>>> +static void hal_dev_dump(const struct camera3_device * /*dev*/, int /*fd*/)
>>>>>>  {
>>>>>>  }
>>>>>>
>>>>>> -static int hal_dev_flush(const struct camera3_device *dev)
>>>>>> +static int hal_dev_flush(const struct camera3_device * /*dev*/)
>>>>>>  {
>>>>>>  	return 0;
>>>>>>  }
>>>>>> diff --git a/src/cam/main.cpp b/src/cam/main.cpp
>>>>>> index 9d99f5587cbb..ceb0efeff045 100644
>>>>>> --- a/src/cam/main.cpp
>>>>>> +++ b/src/cam/main.cpp
>>>>>> @@ -326,7 +326,7 @@ int CamApp::run()
>>>>>>  	return 0;
>>>>>>  }
>>>>>>
>>>>>> -void signalHandler(int signal)
>>>>>> +void signalHandler(int /*signal*/)
>>>>>>  {
>>>>>>  	std::cout << "Exiting" << std::endl;
>>>>>>  	CamApp::instance()->quit();
>>>>>> diff --git a/src/ipa/ipa_vimc.cpp b/src/ipa/ipa_vimc.cpp
>>>>>> index 63d578b4e2aa..16c7e0732d40 100644
>>>>>> --- a/src/ipa/ipa_vimc.cpp
>>>>>> +++ b/src/ipa/ipa_vimc.cpp
>>>>>> @@ -30,11 +30,11 @@ public:
>>>>>>  	~IPAVimc();
>>>>>>
>>>>>>  	int init() override;
>>>>>> -	void configure(const std::map<unsigned int, IPAStream> &streamConfig,
>>>>>> -		       const std::map<unsigned int, ControlInfoMap> &entityControls) override {}
>>>>>> -	void mapBuffers(const std::vector<IPABuffer> &buffers) override {}
>>>>>> -	void unmapBuffers(const std::vector<unsigned int> &ids) override {}
>>>>>> -	void processEvent(const IPAOperationData &event) override {}
>>>>>> +	void configure(const std::map<unsigned int, IPAStream> & /*streamConfig*/,
>>>>>> +		       const std::map<unsigned int, ControlInfoMap> & /*entityControls*/) override {}
>>>>>> +	void mapBuffers(const std::vector<IPABuffer> & /*buffers*/) override {}
>>>>>> +	void unmapBuffers(const std::vector<unsigned int> & /*ids*/) override {}
>>>>>> +	void processEvent(const IPAOperationData & /*event*/) override {}
>>>>>>
>>>>>>  private:
>>>>>>  	void initTrace();
>>>>>> diff --git a/src/ipa/rkisp1/rkisp1.cpp b/src/ipa/rkisp1/rkisp1.cpp
>>>>>> index 9a13f5c7df17..84f270791340 100644
>>>>>> --- a/src/ipa/rkisp1/rkisp1.cpp
>>>>>> +++ b/src/ipa/rkisp1/rkisp1.cpp
>>>>>> @@ -61,7 +61,7 @@ private:
>>>>>>  	uint32_t maxGain_;
>>>>>>  };
>>>>>>
>>>>>> -void IPARkISP1::configure(const std::map<unsigned int, IPAStream> &streamConfig,
>>>>>> +void IPARkISP1::configure(const std::map<unsigned int, IPAStream> & /*streamConfig*/,
>>>>>>  			  const std::map<unsigned int, ControlInfoMap> &entityControls)
>>>>>>  {
>>>>>>  	if (entityControls.empty())
>>>>>> diff --git a/src/libcamera/device_enumerator_udev.cpp b/src/libcamera/device_enumerator_udev.cpp
>>>>>> index b2c5fd221dcd..6e0fbbd8c70c 100644
>>>>>> --- a/src/libcamera/device_enumerator_udev.cpp
>>>>>> +++ b/src/libcamera/device_enumerator_udev.cpp
>>>>>> @@ -309,7 +309,7 @@ int DeviceEnumeratorUdev::addV4L2Device(dev_t devnum)
>>>>>>  	return 0;
>>>>>>  }
>>>>>>
>>>>>> -void DeviceEnumeratorUdev::udevNotify(EventNotifier *notifier)
>>>>>> +void DeviceEnumeratorUdev::udevNotify(EventNotifier * /*notifier*/)
>>>>>>  {
>>>>>>  	struct udev_device *dev = udev_monitor_receive_device(monitor_);
>>>>>>  	std::string action(udev_device_get_action(dev));
>>>>>> diff --git a/src/libcamera/ipc_unixsocket.cpp b/src/libcamera/ipc_unixsocket.cpp
>>>>>> index def08eef00f8..eb594268dd6c 100644
>>>>>> --- a/src/libcamera/ipc_unixsocket.cpp
>>>>>> +++ b/src/libcamera/ipc_unixsocket.cpp
>>>>>> @@ -306,7 +306,7 @@ int IPCUnixSocket::recvData(void *buffer, size_t length,
>>>>>>  	return 0;
>>>>>>  }
>>>>>>
>>>>>> -void IPCUnixSocket::dataNotifier(EventNotifier *notifier)
>>>>>> +void IPCUnixSocket::dataNotifier(EventNotifier * /*notifier*/)
>>>>>>  {
>>>>>>  	int ret;
>>>>>>
>>>>>> diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
>>>>>> index 8d3ad568d16e..84356646b736 100644
>>>>>> --- a/src/libcamera/pipeline/ipu3/ipu3.cpp
>>>>>> +++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
>>>>>> @@ -700,7 +700,7 @@ error:
>>>>>>  }
>>>>>>
>>>>>>  int PipelineHandlerIPU3::freeBuffers(Camera *camera,
>>>>>> -				     const std::set<Stream *> &streams)
>>>>>> +				     const std::set<Stream *> & /*streams*/)
>>>>>>  {
>>>>>>  	IPU3CameraData *data = cameraData(camera);
>>>>>>
>>>>>> diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
>>>>>> index 7a28b03b8d38..aed060bada70 100644
>>>>>> --- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
>>>>>> +++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
>>>>>> @@ -703,7 +703,7 @@ int PipelineHandlerRkISP1::allocateBuffers(Camera *camera,
>>>>>>  }
>>>>>>
>>>>>>  int PipelineHandlerRkISP1::freeBuffers(Camera *camera,
>>>>>> -				       const std::set<Stream *> &streams)
>>>>>> +				       const std::set<Stream *> & /*streams*/)
>>>>>>  {
>>>>>>  	RkISP1CameraData *data = cameraData(camera);
>>>>>>
>>>>>> diff --git a/src/libcamera/pipeline/rkisp1/timeline.cpp b/src/libcamera/pipeline/rkisp1/timeline.cpp
>>>>>> index f6c6434d7b53..59e6de78c79d 100644
>>>>>> --- a/src/libcamera/pipeline/rkisp1/timeline.cpp
>>>>>> +++ b/src/libcamera/pipeline/rkisp1/timeline.cpp
>>>>>> @@ -204,7 +204,7 @@ void Timeline::updateDeadline()
>>>>>>  	timer_.start(deadline);
>>>>>>  }
>>>>>>
>>>>>> -void Timeline::timeout(Timer *timer)
>>>>>> +void Timeline::timeout(Timer * /*timer*/)
>>>>>>  {
>>>>>>  	utils::time_point now = std::chrono::steady_clock::now();
>>>>>>
>>>>>> diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp
>>>>>> index fae0ffc4de30..94464c7c7f0c 100644
>>>>>> --- a/src/libcamera/pipeline/uvcvideo.cpp
>>>>>> +++ b/src/libcamera/pipeline/uvcvideo.cpp
>>>>>> @@ -208,7 +208,7 @@ int PipelineHandlerUVC::allocateBuffers(Camera *camera,
>>>>>>  }
>>>>>>
>>>>>>  int PipelineHandlerUVC::freeBuffers(Camera *camera,
>>>>>> -				    const std::set<Stream *> &streams)
>>>>>> +				    const std::set<Stream *> & /*streams*/)
>>>>>>  {
>>>>>>  	UVCCameraData *data = cameraData(camera);
>>>>>>  	return data->video_->releaseBuffers();
>>>>>> diff --git a/src/libcamera/pipeline/vimc.cpp b/src/libcamera/pipeline/vimc.cpp
>>>>>> index c16ae4cb76b5..7e325469f178 100644
>>>>>> --- a/src/libcamera/pipeline/vimc.cpp
>>>>>> +++ b/src/libcamera/pipeline/vimc.cpp
>>>>>> @@ -166,7 +166,7 @@ PipelineHandlerVimc::PipelineHandlerVimc(CameraManager *manager)
>>>>>>  {
>>>>>>  }
>>>>>>
>>>>>> -CameraConfiguration *PipelineHandlerVimc::generateConfiguration(Camera *camera,
>>>>>> +CameraConfiguration *PipelineHandlerVimc::generateConfiguration(Camera * /*camera*/,
>>>>>>  	const StreamRoles &roles)
>>>>>>  {
>>>>>>  	CameraConfiguration *config = new VimcCameraConfiguration();
>>>>>> @@ -274,7 +274,7 @@ int PipelineHandlerVimc::allocateBuffers(Camera *camera,
>>>>>>  }
>>>>>>
>>>>>>  int PipelineHandlerVimc::freeBuffers(Camera *camera,
>>>>>> -				     const std::set<Stream *> &streams)
>>>>>> +				     const std::set<Stream *> & /*streams*/)
>>>>>>  {
>>>>>>  	VimcCameraData *data = cameraData(camera);
>>>>>>  	return data->video_->releaseBuffers();
>>>>>> diff --git a/src/libcamera/process.cpp b/src/libcamera/process.cpp
>>>>>> index 3b4d0f10da67..44ebfec178fe 100644
>>>>>> --- a/src/libcamera/process.cpp
>>>>>> +++ b/src/libcamera/process.cpp
>>>>>> @@ -89,7 +89,7 @@ void sigact(int signal, siginfo_t *info, void *ucontext)
>>>>>>
>>>>>>  } /* namespace */
>>>>>>
>>>>>> -void ProcessManager::sighandler(EventNotifier *notifier)
>>>>>> +void ProcessManager::sighandler(EventNotifier * /*notifier*/)
>>>>>>  {
>>>>>>  	char data;
>>>>>>  	ssize_t ret = read(pipe_[0], &data, sizeof(data));
>>>>>> diff --git a/src/libcamera/proxy/ipa_proxy_linux.cpp b/src/libcamera/proxy/ipa_proxy_linux.cpp
>>>>>> index 4e6fa6899e07..d4ccf5112cd7 100644
>>>>>> --- a/src/libcamera/proxy/ipa_proxy_linux.cpp
>>>>>> +++ b/src/libcamera/proxy/ipa_proxy_linux.cpp
>>>>>> @@ -27,11 +27,11 @@ public:
>>>>>>  	~IPAProxyLinux();
>>>>>>
>>>>>>  	int init() override { return 0; }
>>>>>> -	void configure(const std::map<unsigned int, IPAStream> &streamConfig,
>>>>>> -		       const std::map<unsigned int, ControlInfoMap> &entityControls) override {}
>>>>>> -	void mapBuffers(const std::vector<IPABuffer> &buffers) override {}
>>>>>> -	void unmapBuffers(const std::vector<unsigned int> &ids) override {}
>>>>>> -	void processEvent(const IPAOperationData &event) override {}
>>>>>> +	void configure(const std::map<unsigned int, IPAStream> & /*streamConfig*/,
>>>>>> +		       const std::map<unsigned int, ControlInfoMap> & /*entityControls*/) override {}
>>>>>> +	void mapBuffers(const std::vector<IPABuffer> & /*buffers*/) override {}
>>>>>> +	void unmapBuffers(const std::vector<unsigned int> & /*ids*/) override {}
>>>>>> +	void processEvent(const IPAOperationData & /*event*/) override {}
>>>>>>
>>>>>>  private:
>>>>>>  	void readyRead(IPCUnixSocket *ipc);
>>>>>> @@ -86,7 +86,7 @@ IPAProxyLinux::~IPAProxyLinux()
>>>>>>  	delete socket_;
>>>>>>  }
>>>>>>
>>>>>> -void IPAProxyLinux::readyRead(IPCUnixSocket *ipc)
>>>>>> +void IPAProxyLinux::readyRead(IPCUnixSocket * /*ipc*/)
>>>>>>  {
>>>>>>  }
>>>>>>
>>>>>> diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
>>>>>> index 208ab54199b1..87d810d7cfa4 100644
>>>>>> --- a/src/libcamera/v4l2_videodevice.cpp
>>>>>> +++ b/src/libcamera/v4l2_videodevice.cpp
>>>>>> @@ -1141,7 +1141,7 @@ Buffer *V4L2VideoDevice::dequeueBuffer()
>>>>>>   * For Capture video devices the Buffer will contain valid data.
>>>>>>   * For Output video devices the Buffer can be considered empty.
>>>>>>   */
>>>>>> -void V4L2VideoDevice::bufferAvailable(EventNotifier *notifier)
>>>>>> +void V4L2VideoDevice::bufferAvailable(EventNotifier * /*notifier*/)
>>>>>>  {
>>>>>>  	Buffer *buffer = dequeueBuffer();
>>>>>>  	if (!buffer)
>>>>>> diff --git a/src/qcam/main.cpp b/src/qcam/main.cpp
>>>>>> index a7ff5c52663b..d8cfc1c3d76b 100644
>>>>>> --- a/src/qcam/main.cpp
>>>>>> +++ b/src/qcam/main.cpp
>>>>>> @@ -17,7 +17,7 @@
>>>>>>  #include "../cam/options.h"
>>>>>>  #include "qt_event_dispatcher.h"
>>>>>>
>>>>>> -void signalHandler(int signal)
>>>>>> +void signalHandler(int /*signal*/)
>>>>>>  {
>>>>>>  	std::cout << "Exiting" << std::endl;
>>>>>>  	qApp->quit();
>>>>>> diff --git a/test/camera/capture.cpp b/test/camera/capture.cpp
>>>>>> index 791ccad15f70..a5fd0a641705 100644
>>>>>> --- a/test/camera/capture.cpp
>>>>>> +++ b/test/camera/capture.cpp
>>>>>> @@ -19,7 +19,7 @@ protected:
>>>>>>  	unsigned int completeBuffersCount_;
>>>>>>  	unsigned int completeRequestsCount_;
>>>>>>
>>>>>> -	void bufferComplete(Request *request, Buffer *buffer)
>>>>>> +	void bufferComplete(Request * /*request*/, Buffer *buffer)
>>>>>>  	{
>>>>>>  		if (buffer->status() != Buffer::BufferSuccess)
>>>>>>  			return;
>>>>>> diff --git a/test/libtest/test.h b/test/libtest/test.h
>>>>>> index ec08bf97c03d..193d7aa99f38 100644
>>>>>> --- a/test/libtest/test.h
>>>>>> +++ b/test/libtest/test.h
>>>>>> @@ -26,11 +26,11 @@ public:
>>>>>>  protected:
>>>>>>  	virtual int init() { return 0; }
>>>>>>  	virtual int run() = 0;
>>>>>> -	virtual void cleanup() { }
>>>>>> +	virtual void cleanup() {}
>>>>>>  };
>>>>>>
>>>>>>  #define TEST_REGISTER(klass)						\
>>>>>> -int main(int argc, char *argv[])					\
>>>>>> +int main(int /*argc*/, char * /*argv*/[])				\
>>>>>>  {									\
>>>>>>  	return klass().execute();					\
>>>>>>  }
>>>>>> diff --git a/test/log/log_process.cpp b/test/log/log_process.cpp
>>>>>> index 2df4aa43713c..fa5639dde7cb 100644
>>>>>> --- a/test/log/log_process.cpp
>>>>>> +++ b/test/log/log_process.cpp
>>>>>> @@ -123,7 +123,8 @@ protected:
>>>>>>  	}
>>>>>>
>>>>>>  private:
>>>>>> -	void procFinished(Process *proc, enum Process::ExitStatus exitStatus, int exitCode)
>>>>>> +	void procFinished(Process * /*proc*/,
>>>>>> +			  enum Process::ExitStatus exitStatus, int exitCode)
>>>>>>  	{
>>>>>>  		exitStatus_ = exitStatus;
>>>>>>  		exitCode_ = exitCode;
>>>>>> diff --git a/test/message.cpp b/test/message.cpp
>>>>>> index 3775c30a20b3..3e2659c836e3 100644
>>>>>> --- a/test/message.cpp
>>>>>> +++ b/test/message.cpp
>>>>>> @@ -35,7 +35,7 @@ public:
>>>>>>  	void reset() { status_ = NoMessage; }
>>>>>>
>>>>>>  protected:
>>>>>> -	void message(Message *msg)
>>>>>> +	void message(Message * /*msg*/)
>>>>>>  	{
>>>>>>  		if (thread() != Thread::current())
>>>>>>  			status_ = InvalidThread;
>>>>>> diff --git a/test/process/process_test.cpp b/test/process/process_test.cpp
>>>>>> index 7e7b3c2c8bf3..2ba3efd08457 100644
>>>>>> --- a/test/process/process_test.cpp
>>>>>> +++ b/test/process/process_test.cpp
>>>>>> @@ -75,7 +75,8 @@ protected:
>>>>>>  	}
>>>>>>
>>>>>>  private:
>>>>>> -	void procFinished(Process *proc, enum Process::ExitStatus exitStatus, int exitCode)
>>>>>> +	void procFinished(Process * /*proc*/,
>>>>>> +			  enum Process::ExitStatus exitStatus, int exitCode)
>>>>>>  	{
>>>>>>  		exitStatus_ = exitStatus;
>>>>>>  		exitCode_ = exitCode;
>>>>>> diff --git a/test/timer-thread.cpp b/test/timer-thread.cpp
>>>>>> index 32853b4e80ef..55b7abcbbeab 100644
>>>>>> --- a/test/timer-thread.cpp
>>>>>> +++ b/test/timer-thread.cpp
>>>>>> @@ -39,7 +39,7 @@ public:
>>>>>>  	}
>>>>>>
>>>>>>  private:
>>>>>> -	void timeoutHandler(Timer *timer)
>>>>>> +	void timeoutHandler(Timer * /*timer*/)
>>>>>>  	{
>>>>>>  		timeout_ = true;
>>>>>>  	}
>>>>>> diff --git a/test/timer.cpp b/test/timer.cpp
>>>>>> index 2bdb006edccb..03df03aa8d69 100644
>>>>>> --- a/test/timer.cpp
>>>>>> +++ b/test/timer.cpp
>>>>>> @@ -56,7 +56,7 @@ public:
>>>>>>  	}
>>>>>>
>>>>>>  private:
>>>>>> -	void timeoutHandler(Timer *timer)
>>>>>> +	void timeoutHandler(Timer * /*timer*/)
>>>>>>  	{
>>>>>>  		expiration_ = std::chrono::steady_clock::now();
>>>>>>  		count_++;
>>>>>>
>>>
>>> --
>>> Regards,
>>>
>>> Laurent Pinchart
>>> _______________________________________________
>>> libcamera-devel mailing list
>>> libcamera-devel at lists.libcamera.org
>>> https://lists.libcamera.org/listinfo/libcamera-devel
> 
> 
> 
>> _______________________________________________
>> libcamera-devel mailing list
>> libcamera-devel at lists.libcamera.org
>> https://lists.libcamera.org/listinfo/libcamera-devel
> 
> 
> _______________________________________________
> libcamera-devel mailing list
> libcamera-devel at lists.libcamera.org
> https://lists.libcamera.org/listinfo/libcamera-devel
> 

-- 
Regards
--
Kieran


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