[Bug 246419] security/nss: fix build on powerpc64 elfv1

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246419

Piotr Kubaj <pkubaj at FreeBSD.org> changed:

           What    |Removed                     |Added
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 Attachment #214418|0                           |1
        is obsolete|                            |
 Attachment #214418|maintainer-approval?(gecko@ |
              Flags|FreeBSD.org)                |
 Attachment #214420|                            |maintainer-approval?(gecko@
              Flags|                            |FreeBSD.org)

--- Comment #3 from Piotr Kubaj <pkubaj at FreeBSD.org> ---
Created attachment 214420
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=214420&action=edit
v3

More correct solution.

The previous patch worked, but sha512-p8 wasn't included in the final binary
because USE_PPC_CRYPTO is disabled. sha512-p8 was just built, but not used
earlier. This is why all tests passed.

The problem with it is that the assembly is tailored to little-endian and won't
work on big-endian. However, there is a proper script to generate sha512-p8 for
big-endian, both elfv1 and elfv2. There is also a variant for 32-bit powerpc.
Ideally, this script should run always, but upstream seems to have forgotten
that and just put the generated sha512-p8 to the source. This patch takes care
of running this script.

Also, since USE_PPC_CRYPTO works on big-endian, put an option to enable that.
It will use VSX, which is available on POWER8 and newer. I made it available on
32 bits as well, just in case someone on VSX-capable machine wants to run
32-bit chroot or jail.

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