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toolchain/53067: HEAD-llvm style build produces non executable binaries on NetBSD/macppc



>Number:         53067
>Category:       toolchain
>Synopsis:       HEAD-llvm style build produces non executable binaries on NetBSD/macppc
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 03 02:10:00 +0000 2018
>Originator:     Sevan Janiyan
>Release:        NetBSD 8.99.12
>Organization:
>Environment:
>Description:
On investigating the build failure for macppc port in the HEAD-LLVM branch, I managed to build a release successfully from FreeBSD 11.1.

ofwboot.xcf on the CD is non bootable an explodes shortly after producing the first line of test with the version / date the build happened. This issue was previously reported by jmmv on the port-macppc
list
https://mail-index.netbsd.org/port-macppc/2017/12/03/msg002464.html

Turns out the kernels built in this release work just fine.
I copied the netbsd-install.gz kernel to disk & booted the system from that instead. I was able to perform an upgrade of an existing install partially without issue. All the sets I'd built extracted just fine but the final steps such as the sysupgrade process failed to run.
Reboot the system, the kernel boot up just fine but as the system went to go multi-user, the init process crashed with 
trap: pid 1.1 (init): user read DSI trap @ 0x10 by 0xfde171c8 (DSISR 0x40000000, err=14)
and continued to fill the screen with the same message over & over again.

>How-To-Repeat:
./build.sh -U -m macppc -V MKLLVM=yes -V HAVE_LLVM=yes -V MKGCC=no release
and install on a PowerPC Mac
>Fix:



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