On 23/08/2021 18:12, John Maddock via Boost-users wrote:
I suspect you have a mangled platform header somewhere.
I found it !!!
FWIW the problematic file (ammintrin.h) gets #included quite early in
intrin.h like this:-
#if (defined (_M_IX86) || defined (_M_X64)) &&
!defined(_CHPE_ONLY_)
#include <immintrin.h>
#include <ammintrin.h>
#endif
I checked 'immintin.h' and realised it was a zero length file! I then
restored it from a recent backup and the problem's gone!! Many thanks
John and Edward for all your help with this,
John
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