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Enable SSE2 for i686 mingw32 #8627
The eagle-eyed amongst us may have noticed that AppVeyor has been failing all builds since this morning. AppVeyor updated the Cygwin installation in the Windows workers (see the April 17 update and in particular appveyor/ci#2898 (comment)).
This bumped mingw-w64 gcc from 6.4 to 7.4, and with
A sledgehammer is to specify
Excess FP precision strikes again...
I'm OK with the proposed fix, given that for this configuration we know that the compiler is gcc and the OS requires SSE2.
I suspect there is an alternate implementation of