https://lists.fedoraproject.org/pipermail/packaging/2013-June/009206.html
FPC decided that they should work on the rules surrounding %{_isa} Remi is going to pick up the Arch Specific Requires draft and work to get it into the Guidelines:
https://fedoraproject.org/wiki/PackagingDrafts/ArchSpecificRequires
As a preliminary (as this is currently being discussed on the mailing list) we also voted on the specific question of using %{_isa} with BuildRequires. We decided:
Proposal: Do not use %{_isa} with BuildRequires. Passed (+1: 5, 0:0, -1:0)
for the reasons mschwendt has expressed in bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=820544#c39 and on the mailing lists https://lists.fedoraproject.org/pipermail/packaging/2013-June/009214.html.
Added to the Guidelines here: https://fedoraproject.org/wiki/Packaging:Guidelines#BuildRequires_and_.25.7B_isa.7D
writeup announcement:
""" A prohibition on using %{_isa} in BuildRequires has formally been added to the Guidelines: https://fedoraproject.org/wiki/Packaging:Guidelines#BuildRequires_and_.25.7B_isa.7D
Work on finishing a complete %{_isa} Guideline is underway. """
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