impl/gcc: add native 256-bit and 512-bit intrinsics these are simple to implement. At some point I'd like to refactor vec into using a union and being able to detect AVX512 and friends at compile time, so that the processors that *can* use it are enabled at runtime. This would mean adding a vec_init function, which isn't that big of a deal and can just be run at startup anyway and will grab the CPU flags we need.

prefix=@CMAKE_INSTALL_PREFIX@
exec_prefix=@CMAKE_INSTALL_PREFIX@
libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@
includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@

Name: @PROJECT_NAME@
Description: @PROJECT_DESCRIPTION@
Version: @PROJECT_VERSION@

Requires:
Libs: -L${libdir} -lvec
Cflags: -I${includedir} -DVEC_EXTERN