RFR: 8199138: Add RISC-V support to Zero

[John Paul Adrian Glaubitz]

Hello!

On 4/6/20 8:09 PM, John Paul Adrian Glaubitz wrote:
> I have reduced the complexity of the patch as some of the changes from
> the previous change set are not necessary, in particular the changes
> to config.{guess,sub}, the definition of EM_RISCV (which is already defined
> by the Linux kernel headers now provided the kernel is recent enough).

After checking various kernel headers of older but still supported enterprise
Linux distributions such as SLE-12 and RHEL-7, I think it's probably better
to include the redundant EM_RISCV definition to avoid build problems on these
platforms [1]. I just want to be on the safe side.

The build changes are unchanged.

Adrian

> [1] http://cr.openjdk.java.net/~glaubitz/8199138/webrev.03/

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913