zlib

USE flags

• bundled-c-zlib - Use the bundled zlib C sources. Requires pkg-config to be False. For windows, this is the default.
• doc - Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
• hscolour - Include coloured haskell sources to generated documentation (dev-haskell/hscolour)
• non-blocking-ffi - The (de)compression calls can sometimes take a long time, which prevents other Haskell threads running. Enabling this flag avoids this unfairness, but with greater overall cost.
• profile - Add support for software performance analysis (will likely vary from ebuild to ebuild)
• test - Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)