lis

USE флаги

• cpu_flags_x86_fma3 - Use the Fused Multiply Add 3 instruction set ([fma] in cpuinfo)
• cpu_flags_x86_fma4 - Use the Fused Multiply Add 4 instruction set
• cpu_flags_x86_sse2 - Use the SSE2 instruction set
• doc - Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
• fortran - Add support for fortran
• mpi - Add MPI (Message Passing Interface) layer to the apps that support it
• openmp - Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
• quad - Enable quadruple precision operations
• saamg - Build the Smoothed Aggregation Algebraic MultiGrid preconditioner
• static-libs - Build static versions of dynamic libraries as well