metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>bsd@gentoo.org</email>
    <name>BSD Project</name>
  </maintainer>
  <longdescription lang="en">
    The bsdtar program creates and manipulates streaming archive files.
    It has a number of advantages over previous tar implementations.
  </longdescription>
  <use>
    <flag name="bzip2">
      Allow accessing bzip2-compressed archives through libbz2 (which
      comes with <pkg>app-arch/bzip2</pkg>). This only affects
      libarchive's native support: bsdtar will keep using bunzip2 as a
      filter if that's not built-in.
    </flag>
    <flag name="e2fsprogs">
      Use file flags from <pkg>sys-fs/e2fsprogs</pkg> headers instead of <pkg>virtual/os-headers</pkg> headers
    </flag>
	<flag name="lz4">
		Enable support for LZ4 compression using <pkg>app-arch/lz4</pkg>
	</flag>
    <flag name="nettle">
      Use <pkg>dev-libs/nettle</pkg> as crypto backend
    </flag>
    <flag name="zlib">
      Allow accessing gzip-compressed archives through
      <pkg>sys-libs/zlib</pkg>. This only affects libarchive's native
      support: bsdtar will keep using gunzip as a filter if that's not
      built-in. It's also needed for supporting extraction of ZIP
      files.
    </flag>
  </use>
</pkgmetadata>