VariableOrderWrong: version 1.8.7-r1: variable HOMEPAGE should occur before SRC_URI
  HttpsUrlAvailable: version 1.8.7-r3: SRC_URI: HTTPS url available: http://www.ginac.de/ginac-1.8.7.tar.bz2 -> https://www.ginac.de/ginac-1.8.7.tar.bz2