[Bug libstdc++/77691] [7/8 regression] experimental/memory_resource/resource_adaptor.cc FAILs

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77691

--- Comment #12 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Wed, 21 Mar 2018, ro at CeBiTec dot Uni-Bielefeld.DE wrote:

> Joseph, any suggestions?  You mentioned that older versions of glibc
> didn't provide 16-byte alignment in i386 malloc; maybe there are other
> systems with the same issue that could equally benefit from some fix?

The fix in glibc was to increase malloc alignment for i386.  This is an 
area where properly supporting a feature (_Float128 and _Decimal128, both 
of which are 16-byte aligned on i386) requires cooperation between the 
compiler and library - in this case, even without other library support 
for those types, users can still legitimately expect memory from malloc to 
be suitably aligned for them, and for max_align_t to have suitable 
alignment for them.