libgcrypt20
  provides "libgcrypt-<targettype> = <version>"
  obsoletes "libgcrypt-<targettype> <= <version>"
  provides "libgcrypt20-hmac-<targettype> = <version>-%release"
  obsoletes "libgcrypt20-hmac-<targettype> < <version>-%release"
libgcrypt-devel
  requires -libgcrypt-<targettype>
  requires "libgcrypt20-<targettype> = <version>"