/usr/ is in tcl8.5-dev 8.5.19-2+b1.
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..
/usr/include/
/usr/include/tcl8.5/
/usr/include/tcl8.5/tcl-private/
/usr/include/tcl8.5/tcl-private/compat/
/usr/include/tcl8.5/tcl-private/compat/dirent.h
/usr/include/tcl8.5/tcl-private/compat/dirent2.h
/usr/include/tcl8.5/tcl-private/compat/dlfcn.h
/usr/include/tcl8.5/tcl-private/compat/float.h
/usr/include/tcl8.5/tcl-private/compat/limits.h
/usr/include/tcl8.5/tcl-private/compat/stdlib.h
/usr/include/tcl8.5/tcl-private/compat/string.h
/usr/include/tcl8.5/tcl-private/compat/unistd.h
/usr/include/tcl8.5/tcl-private/generic/
/usr/include/tcl8.5/tcl-private/generic/regcustom.h
/usr/include/tcl8.5/tcl-private/generic/regerrs.h
/usr/include/tcl8.5/tcl-private/generic/regex.h
/usr/include/tcl8.5/tcl-private/generic/regguts.h
/usr/include/tcl8.5/tcl-private/generic/tcl.h
/usr/include/tcl8.5/tcl-private/generic/tclCompile.h
/usr/include/tcl8.5/tcl-private/generic/tclDecls.h
/usr/include/tcl8.5/tcl-private/generic/tclFileSystem.h
/usr/include/tcl8.5/tcl-private/generic/tclIO.h
/usr/include/tcl8.5/tcl-private/generic/tclInt.h
/usr/include/tcl8.5/tcl-private/generic/tclIntDecls.h
/usr/include/tcl8.5/tcl-private/generic/tclIntPlatDecls.h
/usr/include/tcl8.5/tcl-private/generic/tclPlatDecls.h
/usr/include/tcl8.5/tcl-private/generic/tclPort.h
/usr/include/tcl8.5/tcl-private/generic/tclRegexp.h
/usr/include/tcl8.5/tcl-private/generic/tclTomMath.h
/usr/include/tcl8.5/tcl-private/generic/tclTomMathDecls.h
/usr/include/tcl8.5/tcl-private/generic/tclTomMathInt.h
/usr/include/tcl8.5/tcl-private/generic/tommath.h
/usr/include/tcl8.5/tcl-private/libtommath/
/usr/include/tcl8.5/tcl-private/libtommath/tommath.h
/usr/include/tcl8.5/tcl-private/libtommath/tommath_class.h
/usr/include/tcl8.5/tcl-private/libtommath/tommath_superclass.h
/usr/include/tcl8.5/tcl-private/unix/
/usr/include/tcl8.5/tcl-private/unix/tclUnixPort.h
/usr/include/tcl8.5/tcl-private/unix/tclUnixThrd.h
/usr/include/tcl8.5/tcl.h
/usr/include/tcl8.5/tclDecls.h
/usr/include/tcl8.5/tclPlatDecls.h
/usr/include/tcl8.5/tclTomMath.h
/usr/include/tcl8.5/tclTomMathDecls.h
/usr/lib/
/usr/lib/tcl8.5/
/usr/lib/tcl8.5/tclConfig.sh
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libtcl8.5.a
/usr/lib/x86_64-linux-gnu/libtclstub8.5.a
/usr/lib/x86_64-linux-gnu/tcl8.5/
/usr/lib/x86_64-linux-gnu/tcl8.5/tclConfig.sh
/usr/share/
/usr/share/aclocal/
/usr/share/aclocal/tcl8.5.m4
/usr/share/doc/
/usr/share/doc/tcl8.5-dev/
/usr/share/doc/tcl8.5-dev/README.TCL_INC
/usr/share/doc/tcl8.5-dev/changelog.Debian.amd64.gz
/usr/share/doc/tcl8.5-dev/changelog.Debian.gz
/usr/share/doc/tcl8.5-dev/changelog.gz
/usr/share/doc/tcl8.5-dev/copyright