/usr/ is in libclblas-dev 2.12-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/clAmdBlas.h
/usr/include/clAmdBlas.version.h
/usr/include/clBLAS-complex.h
/usr/include/clBLAS.h
/usr/include/clBLAS.version.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/clBLAS/
/usr/lib/x86_64-linux-gnu/cmake/clBLAS/clBLASConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/clBLAS/clBLASConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/clBLAS/clBLASTargets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/clBLAS/clBLASTargets.cmake
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/clBLAS.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libclblas-dev/
/usr/share/doc/libclblas-dev/copyright
/usr/lib/x86_64-linux-gnu/libclBLAS.so
/usr/share/doc/libclblas-dev/changelog.Debian.gz