Mac M1 not automatically detected

[BUMPRW]

Have tried a variety of methods to install. The error message remains the same.

*** Cannot continue with unregistered configuration

[devinamatthews]

BLIS currently doesn't work on M1 (see #492). Now, it looks like you're seeing a slightly different issue. Could you please send the command you used to configure and the full output?

[BUMPRW]

This is an attempt to have brew install blis, the result is almost identical for a python install and ./configure auto:
brew install --build-from-source blis
==> Downloading https://github.com/flame/blis/archive/0.8.1.tar.gz
Already downloaded: /Users/xxxxxxxxxxxxx/Library/Caches/Homebrew/downloads/b730fb496c498b4333b5e032fe947fd181ecdd62cfc129c1c8ab23dc9127a384--blis-0.8.1.tar.gz
==> ./configure --prefix=/opt/homebrew/Cellar/blis/0.8.1 --enable-cblas auto
Last 15 lines from /Users/xxxxxxxxxxx/Library/Logs/Homebrew/blis/01.configure:
configure: reading configuration registry...done.
configure: determining default version string.
configure: could not find '.git' directory; using unmodified version file.
configure: starting configuration of BLIS 0.8.1.
configure: configuring with official version string.
configure: found shared library .so version '3.0.0'.
configure: .so major version: 3
configure: .so minor.build version: 0.0
configure: automatic configuration requested.
configure: hardware detection driver returned ''.
configure: checking configuration against contents of 'config_registry'.
configure: 'auto-detected configuration '' is NOT registered!
configure:
configure: *** Cannot continue with unregistered configuration ''. ***
configure:

Do not report this issue to Homebrew/brew or Homebrew/core!

[devinamatthews]

Ah, we definitely haven't implemented auto-detection for M1. I've changed the title to reflect this specific problem so we can remember to fix it once BLIS actually compiles on that platform.

[jeffhammond]

not hard to write, but if you want the dumb C code to detect Apple M1, here it is:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <sys/sysctl.h>

int main(void)
{
    int rc;
    size_t len;
    rc = sysctlbyname("machdep.cpu.brand_string", NULL, &len, NULL, 0);
    char * buf = calloc(len,1);
    rc = sysctlbyname("machdep.cpu.brand_string", buf, &len, NULL, 0);
    printf("machdep.cpu.brand_string = %s\n",buf);
    printf("is Apple M1? %s\n", 0==strncmp(buf,"Apple M1",len) ? "yes" : "no");
    free(buf);
    return 0;
}

[hominhquan]

I wonder if the CPU detection can not be done with some standard API like PAPI or hwloc ? This adds a dependency certainly, but provides easier management.

http://icl.cs.utk.edu/projects/papi-2.1/files/html_man/papi_get_hardware_info.html