当我在我的mac终端中使用brew doctor时，我得到以下输出
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!
Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected dylibs:
/usr/local/lib/libtcl8.6.dylib
/usr/local/lib/libtk8.6.dylib
Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected header files:
/usr/local/include/fakemysql.h
/usr/local/include/fakepq.h
/usr/local/include/fakesql.h
/usr/local/include/itcl.h
/usr/local/include/itcl2TclOO.h
/usr/local/include/itclDecls.h
/usr/local/include/itclInt.h
/usr/local/include/itclIntDecls.h
/usr/local/include/itclMigrate2TclCore.h
/usr/local/include/itclTclIntStubsFcn.h
/usr/local/include/mysqlStubs.h
/usr/local/include/odbcStubs.h
/usr/local/include/pqStubs.h
/usr/local/include/tcl.h
/usr/local/include/tclDecls.h
/usr/local/include/tclOO.h
/usr/local/include/tclOODecls.h
/usr/local/include/tclPlatDecls.h
/usr/local/include/tclThread.h
/usr/local/include/tclTomMath.h
/usr/local/include/tclTomMathDecls.h
/usr/local/include/tdbc.h
/usr/local/include/tdbcDecls.h
/usr/local/include/tdbcInt.h
/usr/local/include/tk.h
/usr/local/include/tkDecls.h
/usr/local/include/tkPlatDecls.h
Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected .pc files:
/usr/local/lib/pkgconfig/tcl.pc
/usr/local/lib/pkgconfig/tk.pc
Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected static libraries:
/usr/local/lib/libtclstub8.6.a
/usr/local/lib/libtkstub8.6.a
Warning: Homebrew's sbin was not found in your PATH but you have installed
formulae that put executables in /usr/local/sbin.
Consider setting the PATH for example like so
echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.bash_profile
Warning: Broken symlinks were found. Remove them with `brew prune`:
/usr/local/bin/2to3-3.6
/usr/local/bin/easy_install-3.6
/usr/local/bin/idle3
/usr/local/bin/idle3.6
/usr/local/bin/wheel3
/usr/local/etc/bash_completion.d/_brew_services
/usr/local/lib/pkgconfig/python-3.6.pc
/usr/local/lib/pkgconfig/python-3.6m.pc
/usr/local/lib/pkgconfig/python3.pc
/usr/local/share/man/man1/python3.1
/usr/local/share/man/man1/python3.6.1
/usr/local/opt/python3
/usr/local/opt/python@3
/usr/local/var/homebrew/linked/python3
1）所以我看到它要求我删除文件夹/usr/local/lib /usr/local/include /usr/local/lib中的部分文件
我只是想知道这些文件是如何存在的以及它们如何影响自制软件。
2）我也brew prune删除了已损坏的符号链接，但在我再次使用brew doctor后再次看到它们。
3）我看到上面符号链接警告的警告，即
Homebrew's sbin was not found in your PATH but you have installed
formulae that put executables in /usr/local/sbin.
Consider setting the PATH for example like so
echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.bash_profile
如何解决？
如果再次被问到这个问题，请原谅我，因为我是初学者而无法找到合适的解决方案。