namespace "std" has no member "lcm" tiny-cuda-nn

[dumpinfo]

void set_alignment(uint32_t alignment) override {
	alignment = std::lcm(alignment, min_alignment());
	m_n_padded_output_dims = next_multiple(m_n_output_dims, alignment);
	m_n_to_pad = m_n_padded_output_dims - m_n_output_dims;
}

the command line is:
"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.5\bin\nvcc.exe" -gencode=arch=compute_86,code="compute_86,compute_86" -gencode=arch=compute_86,code="sm_86,compute_86" --use-local-env -ccbin "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64" -x cu -I"N:\Test\tiny-cuda-nn\include" -I"N:\Test\tiny-cuda-nn\dependencies" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.5\include" --keep-dir x64\Debug -maxrregcount=0 --machine 64 --compile -cudart static --extended-lambda --expt-relaxed-constexpr -Xcompiler="/EHsc -Zi -Ob0" -g -D_WINDOWS -D"CMAKE_INTDIR="Debug"" -D"CMAKE_INTDIR="Debug"" -D_MBCS -Xcompiler "/EHsc /W1 /nologo /Od /FdN:\Test\tiny-cuda-nn\build\src\Debug\tiny-cuda-nn.pdb /FS /Zi /RTC1 /MDd /GR" -o tiny-cuda-nn.dir\Debug\encoding.obj "N:\Test\tiny-cuda-nn\src\encoding.cu"” 1。 tiny-cuda-nn C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\VC\v160\BuildCustomizations\CUDA 11.5.targets 785

enviroment:
visual c++ 2019, cmake 3.18
windows 10

[Tom94]

std::lcm is a C++17 feature -- I suspect C++17 is not correctly enabled in your setup. This looks like the same problem as in your other issue #9 , where the lack of std::filesystem is another indicator of a missing C++17 compiler flag. (or a too old compiler)

[dumpinfo]

would you pls list your compile enviroment ?
egs: which visual c++ version, which cmake & windows &cuda version, and what compiler options should be setted in vs studio?

[Tom94]

You can see a minimal compiling example (for both Windows and Linux) here.

Here are the corresponding compiler logs from master: https://github.com/NVlabs/tiny-cuda-nn/actions/runs/1618735536

[Tom94]

Closing, since tiny-cuda-nn no longer requires c++17