Alignment of symbol is not kept during linking

[Yuxuan Shui]

Clarifications:

On Thursday, 9 August 2018 at 13:30:38 UTC, Yuxuan Shui wrote:
> I'm trying to build LDC with dmd and Musl, but the result ldc 
> will always crash. I track that down to an unalignment SIMD 
> access to a global variable. Apparently C++ compiler thinks the 
> variable should be aligned to 16 bytes, but it's only aligned 
> to 8 bytes.

SIMD is generated by the C++ compiler, the unaligned read happens 
in C++ code.

The accessed variable is a __gshared global variable.