GPU: Some compilation fixes without ROOT headers

[davidrohr]

@mconcas : Not sure what we want to do for std::cout << SMatrixGPU()-like cases. Either we hide them in the code, or we implement them, or we just make them output nothing like I did here.
Btw, I saw that the mRep of SMatrixGPU member is public. Is there a reason?

[github-actions]

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[mconcas]

@mconcas : Not sure what we want to do for std::cout << SMatrixGPU()-like cases. Either we hide them in the code, or we implement them, or we just make them output nothing like I did here. Btw, I saw that the mRep of SMatrixGPU member is public. Is there a reason?

I won't take care of adding features we don't need now.
So I'm okay with a no-op, until we'll need some actual implementation.
Concerning the publicity of mRep, this is inherited straight from ROOT fRep datamember, I have no further nuances about it.

https://github.com/root-project/root/blob/b2da3719ab52f7e4cf22e7a2545e3d8a24d99726/math/smatrix/inc/Math/SMatrix.h#L683

[alibuild]

Error while checking build/O2/fullCI for 21925aa at 2024-11-11 21:21:

## sw/BUILD/O2-latest/log
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
/sw/SOURCES/O2/13678-slc8_x86-64/0/DataFormats/Reconstruction/src/TrackParametrizationWithError.cxx(807): error: calling a __host__ function("T1 & o2::math_utils::detail::operator <<< ::o2::gpu::detail::DummyLogger> (T1 &, const  ::o2::math_utils::detail::SMatrixGPU<double, (unsigned int)5u, (unsigned int)5u,  ::o2::math_utils::detail::MatRepSymGPU<double, (unsigned int)5u> >  &)") from a __device__ function("o2::track::TrackParametrizationWithError<float> ::getPredictedChi2 const") is not allowed
/sw/SOURCES/O2/13678-slc8_x86-64/0/DataFormats/Reconstruction/src/TrackParametrizationWithError.cxx(807): error: identifier "o2::math_utils::detail::operator <<< ::o2::gpu::detail::DummyLogger> " is undefined in device code
/sw/SOURCES/O2/13678-slc8_x86-64/0/DataFormats/Reconstruction/src/TrackParametrizationWithError.cxx(899): error: calling a __host__ function("T1 & o2::math_utils::detail::operator <<< ::o2::gpu::detail::DummyLogger> (T1 &, const  ::o2::math_utils::detail::SMatrixGPU<double, (unsigned int)5u, (unsigned int)5u,  ::o2::math_utils::detail::MatRepSymGPU<double, (unsigned int)5u> >  &)") from a __device__ function("o2::track::TrackParametrizationWithError<float> ::update") is not allowed
/sw/SOURCES/O2/13678-slc8_x86-64/0/DataFormats/Reconstruction/src/TrackParametrizationWithError.cxx(899): error: identifier "o2::math_utils::detail::operator <<< ::o2::gpu::detail::DummyLogger> " is undefined in device code
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2/fullCI for ded948d at 2024-11-13 10:27:

## sw/BUILD/O2-latest/log
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
/sw/SOURCES/O2/13678-slc8_x86-64/0/Common/MathUtils/include/MathUtils/SMatrixGPU.h:520:3: error: a type specifier is required for all declarations
/sw/SOURCES/O2/13678-slc8_x86-64/0/Common/MathUtils/include/MathUtils/SMatrixGPU.h:520:59: error: expected ';' at end of declaration
/sw/SOURCES/O2/13678-slc8_x86-64/0/Common/MathUtils/include/MathUtils/SMatrixGPU.h:521:8: error: unknown type name 'X'
/sw/SOURCES/O2/13678-slc8_x86-64/0/Common/MathUtils/include/MathUtils/SMatrixGPU.h:521:22: error: unknown type name 'Y'
/sw/SOURCES/O2/13678-slc8_x86-64/0/Common/MathUtils/include/MathUtils/SMatrixGPU.h:521:45: error: use of undeclared identifier 'T'
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2/fullCI for 6c81c31 at 2024-11-14 00:18:

## sw/BUILD/O2-latest/log
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
c++: error: unrecognized command-line option '--rtlib=compiler-rt'


## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
/sw/BUILD/aa5e002bb88100d32878c344cfb1958d2ffd6e37/O2/Detectors/ITSMFT/ITS/tracking/GPU/hip/TrackingKernels.hip:845:47: error: use nullptr [modernize-use-nullptr]
/sw/BUILD/aa5e002bb88100d32878c344cfb1958d2ffd6e37/O2/Detectors/ITSMFT/ITS/tracking/GPU/hip/TrackingKernels.hip:852:47: error: use nullptr [modernize-use-nullptr]
/sw/BUILD/aa5e002bb88100d32878c344cfb1958d2ffd6e37/O2/Detectors/ITSMFT/ITS/tracking/GPU/hip/TrackingKernels.hip:937:47: error: use nullptr [modernize-use-nullptr]
/sw/BUILD/aa5e002bb88100d32878c344cfb1958d2ffd6e37/O2/Detectors/ITSMFT/ITS/tracking/GPU/hip/TrackingKernels.hip:944:47: error: use nullptr [modernize-use-nullptr]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.