Fix wrong redefinitions of snprintf for older MSVC

_snprintf_s takes an additional (size) argument, so is no direct replacement.
(Note that this code is currently unused - the two instances of snprintf here are within ifdef blocks that are not compiled for MSVC)

MS _snprintf_s takes an additional argument for the size of the buffer, so is not a direct replacement (utest/ctest.h from which I copied was wrong)

Define snprintf for older versions of MSVC

for #1677

Revert "Rewrite &= -> = and simplify the initial blocking phase."

Add cpuid for AMD Ryzen 2

Double MAX_ALLOCATING_THREADS to fix segfaults with Go and Octave

for #1664

Add -march=skylake-avx512 to AVX512 compile check and suppress its ou…

for #1641

Fix typo that broke compilation with DYNAMIC_ARCH and NO_AVX2

fixes 1659

Handle NOFORTRAN=0

Fix apparent off-by-one error in calculation of MAX_ALLOCATING_THREADS

Add compiler option to avx512 test and hide test output

fixes #1641

Disable the 16x2 DTRMM kernel on SkylakeX as well

Disable the AVX512 DGEMM kernel for now

Add DYNAMIC_LIST option for user-defined list of dynamic targets

due to #1643

Remove premature exits from ARMV7 xdot codes

Revert changes to NOFORTRAN handling in Makefile

merge develop

Merge xianyi:develop into develop

Rewrite &= -> = and simplify the initial blocking phase.

Expose the CBLAS interface to the IxAMIN functions and have make build it

Fix data races reported by TSAN.

This is handy for people not using lapack.