Re: mariadb106-client fails to build on NetBSD 10 aarch64

[mlelstv%serpens.de@localhost (Michael van Elst)]

gdt%lexort.com@localhost (Greg Troxel) writes:

>/tmp//cc11LXZf.s:43: Error: selected processor does not support `bti j'

>BTI seems to be present on some aarch64 processors and not others, or
>perhaps only does something on some.

It's from the "Control Flow Integrity" feature that AFAIK was introduced
in armv8.5-a. Older aarch64 processors treat the instruction as a NOP.


>Reading the code, the bti instruction memonically is useed on gcc >=3D 9.1
>and a hand-assembled opcode is used otherwise.  I locally patched that
>to gcc > 10, so it would use the opcode.  That allowed the build to
>continute.   Replacing the package and rebooting, mariadb still works.

It's the assembler that has problems with that instruction, not the compiler.

On the other hand, binutils-2.34 (that we use with netbsd-10) was released
after binutils got support for armv8.5-a, no idea why it fails.