brew doctor

gistfile1.txt

fatal: Not a git repository (or any of the parent directories): .git
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/libftchipid.0.1.0.dylib
    /usr/local/lib/libftd2xx.1.0.2.dylib
    /usr/local/lib/libical.0.0.0.dylib
    /usr/local/lib/libicalss.0.0.0.dylib
    /usr/local/lib/libicalvcal.0.0.0.dylib
    /usr/local/lib/libltdl.3.1.0.dylib

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/libdevkit.a
    /usr/local/lib/libical.a
    /usr/local/lib/libicalss.a
    /usr/local/lib/libicalvcal.a
    /usr/local/lib/libkld.a
    /usr/local/lib/libltdl.a
    /usr/local/lib/libredo_prebinding.a

Unbrewed .la files 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 .la files:
    /usr/local/lib/libical.la
    /usr/local/lib/libicalss.la
    /usr/local/lib/libicalvcal.la
    /usr/local/lib/libltdl.la