Comment 8 for bug 730236

As I commented on that bug, re: underlying cause:

I believe this issue was triggered by a change in the meaning of the flags, so that -a no longer means "all". I looked at it briefly and considered this a silly regression; the previous options covered all use-cases including that of the person requesting the change. Maybe I misunderstood. The bug closed was 572077, in version 7.4.16. There have been several changes to architecture handling since then though. My understanding was that the default of building all architectures could fail if there was an unbuildable architecture (naturally). There was a flag to smart-select only those that were compatible that solved this problem. The result was removing the possibility to build all - such as building an i386 package on 64-bit.