media-libs/opencv: disable implied CPU flags
The OpenCV build system tries to be helpful by enabling unrequested CPU
flags based on requested ones. Unfortunately, this breaks the build on
AMD Piledriver because FMA3 implies AVX2 which is not available on this
architecture.
Further more, these CPU flags should only be handled by the
corresponding Portage flags, instead of CMake's hard-coded automagic.
This commit fixes that by disabling the whole "implication" mechanism
for CPU flags, while also undoing the previous attempt at solving the
problem by translating those broken "implications" into REQUIRED_USE.
Authored-by: Ștefan Talpalaru <stefantalpalaru@yahoo.com>
Bug: https://bugs.gentoo.org/656638
projects / gentoo.git / commit