gistfile1.txt

$ brew doctor
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/libenca.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/libenca.a

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/enca.pc
    /usr/local/lib/pkgconfig/pycairo.pc

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/libenca.la

/Library/Frameworks/Mono.framework detected

This can be picked up by Cmake's build system and likely cause the
build to fail, finding improper header files for libpng for instance.