gmt

USE flags

• blas - Add support for the virtual/blas numerical library
• doc - Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
• examples - Install examples, usually source code
• ffmpeg - Enable ffmpeg/libav-based audio/video codec support
• fftw - Use FFTW library for computing Fourier transforms
• gdal - Enable sci-libs/gdal library support
• geos - Enable sci-libs/geos library support
• gmttria - Non GNU triangulation method, more efficient
• lapack - Add support for the virtual/lapack numerical library
• openmp - Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
• pcre - Add support for Perl Compatible Regular Expressions
• threads - Add threads support for various packages. Usually pthreads
• zlib - Add support for zlib (de)compression