When I install the official torch whl package and the package compiled from the source code, why are the linked dynamic libraries different? How does the official compile and link cuda library and system library？

Official torch whl,

$ ldd libtorch_cuda.so
linux-vdso.so.1 (0x00007fff513fa000)
libcudart-80664282.so.10.2 => /usr/local/lib/python3.6/dist-packages/torch/lib/./libcudart-80664282.so.10.2 (0x00007fc880a74000)
libc10_cuda.so => /usr/local/lib/python3.6/dist-packages/torch/lib/./libc10_cuda.so (0x00007fc880844000)
libnvToolsExt-3965bdd0.so.1 => /usr/local/lib/python3.6/dist-packages/torch/lib/./libnvToolsExt-3965bdd0.so.1 (0x00007fc88063a000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fc88041b000)
libc10.so => /usr/local/lib/python3.6/dist-packages/torch/lib/./libc10.so (0x00007fc880184000)
libtorch_cpu.so => /usr/local/lib/python3.6/dist-packages/torch/lib/./libtorch_cpu.so (0x00007fc86e040000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fc86dca2000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fc86da9e000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fc86d896000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fc86d50d000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fc86d2f5000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc86cf04000)
/lib64/ld-linux-x86-64.so.2 (0x00007fc8c0803000)
libgomp-a34b3233.so.1 => /usr/local/lib/python3.6/dist-packages/torch/lib/./libgomp-a34b3233.so.1 (0x00007fc86ccda000)

Source compiled whl.

$ ldd libtorch_cuda.so
linux-vdso.so.1 (0x00007ffec46ff000)
libcudart.so.10.2 => /usr/local/cuda/lib64/libcudart.so.10.2 (0x00007f04f4cab000)
libc10_cuda.so => /usr/local/lib/python3.6/dist-packages/torch/lib/./libc10_cuda.so (0x00007f04f4a89000)
libcusparse.so.10 => /usr/local/cuda/lib64/libcusparse.so.10 (0x00007f04ece23000)
libcurand.so.10 => /usr/local/cuda/lib64/libcurand.so.10 (0x00007f04e8d80000)
libcusolver.so.10 => /usr/local/cuda/lib64/libcusolver.so.10 (0x00007f04dd5b9000)
libcudnn.so.7 => /usr/lib/x86_64-linux-gnu/libcudnn.so.7 (0x00007f04c1ccf000)
libnvToolsExt.so.1 => /usr/local/cuda/lib64/libnvToolsExt.so.1 (0x00007f04c1ac6000)
libmpi_cxx.so.20 => /usr/lib/x86_64-linux-gnu/libmpi_cxx.so.20 (0x00007f04c18ac000)
libmpi.so.20 => /usr/lib/x86_64-linux-gnu/libmpi.so.20 (0x00007f04c15ba000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f04c139b000)
libtorch_cpu.so => /usr/local/lib/python3.6/dist-packages/torch/lib/./libtorch_cpu.so (0x00007f04baba0000)
libc10.so => /usr/local/lib/python3.6/dist-packages/torch/lib/./libc10.so (0x00007f04ba932000)
libcufft.so.10 => /usr/local/cuda/lib64/libcufft.so.10 (0x00007f04b1492000)
libcublas.so.10 => /usr/lib/x86_64-linux-gnu/libcublas.so.10 (0x00007f04ad1dc000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f04ace53000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f04acab5000)
libomp.so.5 => /usr/lib/x86_64-linux-gnu/libomp.so.5 (0x00007f04ac800000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f04ac5e8000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f04ac1f7000)
/lib64/ld-linux-x86-64.so.2 (0x00007f0512449000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f04abff3000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f04abdeb000)
libopen-rte.so.20 => /usr/lib/x86_64-linux-gnu/libopen-rte.so.20 (0x00007f04abb63000)
libopen-pal.so.20 => /usr/lib/x86_64-linux-gnu/libopen-pal.so.20 (0x00007f04ab8b1000)
libhwloc.so.5 => /usr/lib/x86_64-linux-gnu/libhwloc.so.5 (0x00007f04ab674000)
libnuma.so.1 => /usr/lib/x86_64-linux-gnu/libnuma.so.1 (0x00007f04ab469000)
libblas.so.3 => /usr/lib/x86_64-linux-gnu/libblas.so.3 (0x00007f04ab1fc000)
liblapack.so.3 => /usr/lib/x86_64-linux-gnu/liblapack.so.3 (0x00007f04aa95e000)
libcublasLt.so.10 => /usr/lib/x86_64-linux-gnu/libcublasLt.so.10 (0x00007f04a8acb000)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f04a88c8000)
libltdl.so.7 => /usr/lib/x86_64-linux-gnu/libltdl.so.7 (0x00007f04a86be000)
libgfortran.so.4 => /usr/lib/x86_64-linux-gnu/libgfortran.so.4 (0x00007f04a82df000)
libquadmath.so.0 => /usr/lib/x86_64-linux-gnu/libquadmath.so.0 (0x00007f04a809f000)