Use 64bit build on `CMAKE_SYSTEM_PROCESSOR=i386` on Darwin

Here a bit tricky things.

A value `CMAKE_SYSTEM_PROCESSOR` is came from output of `uname -m` which
migth be 32bit with 64bit building applicaiton.

So, for that case use `CMAKE_SIZEOF_VOID_P` to detect the target.

See https://trac.macports.org/ticket/68488

Add some refines and optimizations for LoongArch.

Allow weak linking on old macOS

Fix CMAKE installation location of lapacke_mangling header

1. Use getauxval instead of cpucfg to test hardware capability.
2. Remove unnecessary code and option for compiler check in c_check.

Enable overstep of too long args without DYNAMIC_ARCH

Update version number and documentation of Reference-LAPACK to 3.12.0

Docu fix for Truncated QR With Pivoting (Reference-LAPACK PR 941)

Revert unintentional change to gmake linking rule in LAPACK TESTING/LIN

Update the list of default dynamic targets for x86_64 in the README to be consistent with the Makefile

POWER: Fixing Makefile error

Recent commit d99aad8ee3 added
extra `)`. This patch fixes the warning from Makefile.

Signed-off-by: Yuning Zhang <codeworm96@outlook.com>

Fix building test_sbgemm

Use _mm_set1_epi{32,64x} to init mask in x86-64 [cz]asum

for skylake kernels. This is the same method as used in [sd]asum.
_mm_set1_epi64x was commented out for zasum, but has the advantage
of avoiding possible undefined behaviour (using an uninitialized
variable), optimized out by NVHPC and icx. The new code works
fine with those compilers.

For GCC 12.3 the generated code is identical; no matter what method
you use, the compiler optimizes the code into a compile-time
constant, there is no performance benefit using mm_cmpeq_epi8
since the corresponding instruction (VPCMPEQB) isn't actually
generated!

Copy XCode15-specific workaround for Apple M to Fortran flags to fix build of tests

* Temporarily disable the C/ZASUM microkernels for any version of NVHPC

Fix casum fallback kernel for x86_64

This kernel is only used on Skylake+ if the kernel with AVX512
intrinsics can't be used, but used the variable x1 incorrectly
in the tail end of the loop, as it is still at the initial
value instead of where x points to.

This caused 55 "other error"s in the LAPACK tests
(https://github.com/OpenMathLib/OpenBLAS/issues/4282)

This change makes casum.c as similar as possible as zasum.c,
because zasum.c does this correctly.

Add truncated QR with pivoting (Reference-LAPACK PR 891)