[wjc@mandrenke:~]% brew doctor
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 and just ignore them. 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/libz.1.2.8.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/zconf.h
  /usr/local/include/zlib.h

Warning: 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/libGctp.la
  /usr/local/lib/libhdfeos.la
  /usr/local/lib/libhe5_hdfeos.la

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/zlib.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/libbacio.a
  /usr/local/lib/libg2.a
  /usr/local/lib/libg2c.a
  /usr/local/lib/libg2c_v1.6.0.a
  /usr/local/lib/libGctp.a
  /usr/local/lib/libhdfeos.a
  /usr/local/lib/libhe5_hdfeos.a
  /usr/local/lib/libw3.a
  /usr/local/lib/libz.a
[wjc@mandrenke:~]%