1. Supply appropriate values for C/Z GEMM unroll when cross-compiling for CORE2 or ARMV7
2. Add the required xLOCAL_BUFFER_SIZE parameters for cross-compiling CORE2
3. Add -DFORCE_<target> option to getarch when building with -DTARGET=target
for #2245

Add arch data for cmake cross-compiling to CORE2

as this semi-official beta option has suddenly reverted to a standard x86_64 environment causing spurious failures

possible cgemv,caxpy,cdot fix

Make x86_64 zdot compile with PGI and Sun C again

for #2235

Fix PGI build options (again)

broken by #2222 as CREAL,CIMAG do not expand to a valid lvalue with these compilers

for #2237

Fix 32bit armv8 compilation regression

Setting it with a simple "uname -m" just to be able to decide whether to compile getarch.c with -march=native
may actually keep getarch from doing a proper probe. Fixes #2231, a regression caused by #2110

merge develop

Add Intel Goldmont Plus CPUID

fixes #2227

Make getarch compile with PGI

rebase

* Add multithreading support

copied from the ThunderX2T99 kernel. For #2221

Make the new DGEMM regression test properly depend on CBLAS and LAPACKE

fixes #2215

Remove case-sensitivity in x86 LSAME on (AMD) cpus without CMOV

Problem was already noticed some years ago in #238, but back then the problem was only corrected in one of the #ifdef branches.
Fixes #2214

Avoid spurious dependency on the fortran runtime despite NOFORTRAN=1

for cases where a fortran compiler is present but not wanted (e.g. not fully functional)

Silence two nuisance warnings from gcc

Provide more information on mmap/munmap failure