"mips" defined by gcc on little endian mips?

[Ross Vandegrift <ross@xxxxxxxxxxx>]

(please CC me on replies, I'm not subscribed)

Surprisingly (to me), this works on little endian mips:
  #include <stdio.h>
  
  int main(int argc, char *argv[])
  {
    printf("%d\n", mips);
  }

Disabling GNU extensions with -std restores expected behavior.  Tested with gcc
10.2 & 8.3 on debian sid & buster.  I couldn't find an obvious explanation in
the keyword index.  Is this behavior expected?  

Thanks,
Ross