Hi Guix,

I tried building OpenBLAS on one of the MIPS build slaves and it went
through the build phase without errors when I set the TARGET to
SICORTEX.  Unfortunately, this doesn’t mean that OpenBLAS actually works
on MIPS: one of the tests fails.

Meanwhile OpenBLAS version 0.2.15 was released and I just updated our
package.  It may well be that this bug has already been fixed by the new
release.

At any rate, I think the two attached patches (one to pass
TARGET=SICORTEX on MIPS; another to enable substitutes for MIPS) are an
improvement.  We can use substitutes for MIPS (and ARM for that matter)
only when TARGET is specified.  The only MIPS target that seems to work
for us appears to be SICORTEX as the other supported targets use
Loongson extensions.

~~ Ricardo