set parameters for CORE_ATHLON

else dgemm_p is set to zero leading to a segfault in alloc_mmap due to
allocsize being zero

add a sanity check on the detected cpu type

if we have 64 bit pointers we can't have a 32 bit cpu, so fall back to
the 64bit cpu fallback (prescott)
E.g. the cpu detection fails in amd qemu64 emulation (family 6 model 2)
causing it to use the uninitialized gotoblas_ATHLON

openblas_get_config function returns the configure string.
So far, it supports USE64BITINT, NO_CBLAS, NO_LAPACK, NO_LAPACKE,
DYNAMIC_ARCH, NO_AFFINITY.

Example:
 #include <stdio.h>
extern char * openblas_get_config();
void main()
{
  printf("%s\n",openblas_get_config());
  return;
}

It overflowed the internal buffer. Thus, we split vector x into blocks when m is very large.

Thank @wangqian for this patch.

Patch applied to Debian package

Please read the issue on github.com for the detail.

Since the DLL now has a fixed name there is no need to install a versioned alias too.

Apply the patch from Tony @tonyhill. Thank you.

GCC 4.7 uses MSVC ABI on Win 32. This means the caller pops the hidden pointer for returning
aggregate structures larger than 8 bytes.

For example, make NO_AVX=1 or make DYNAMIC_ARCH=1 NO_AVX=1