powerpc: fix release image building for Apple partitions

[adrian]

Summary

awk changed somewhere between 14 and 15 and it stopped accepting
a hexadecimal number as its input - it will always return 0.
This results in a very badly written apple boot block.

PR: kern/292341

[adrian]

(no changes planned, please review!)

[jhibbits]

Impressive

release/powerpc/mkisoimages.sh

79–80

I think you could combine these lines, so OFFSET=$(printf "%d" 0x${OFFSET} | awk '{printf("%x\n",$1/512);}').

But, also, the awk change looks to be a pretty significant bug, and should be fixed, too.

[imp]

release/powerpc/mkisoimages.sh

78

Yes, upstream awk changed. I thought I'd found all the places.

Just add OFFSET= $(( 0x${OFFSET} / 512 )) as the next line. you don't need awk for any of this.

[adrian]

option #2, thanks warner! this is cleaner!

[imp]

You could combine the two lines too by

OFFSET=$((0x$(hd...) ))

I can make the case both ways... so either is fine for me.

[adrian]

In D54639#1248394, @imp wrote:

You could combine the two lines too by

OFFSET=$((0x$(hd...) ))

yeah but then it wraps, so it's not shorter per se :-) heh