https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
Jonathan Wakely changed:
What|Removed |Added
Blocks||77691
--- Comment #10 from Jonathan
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
--- Comment #9 from Jonathan Wakely ---
(In reply to Florian Weimer from comment #8)
> The problem is that popular mallocs do not care about ABI and return
> unaligned pointers for allocations smaller than the max_align_t alignment.
> As a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
Florian Weimer changed:
What|Removed |Added
CC||fw at gcc dot gnu.org
--- Comment #8
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
--- Comment #7 from Jonathan Wakely ---
The glibc change was https://sourceware.org/bugzilla/show_bug.cgi?id=21120 and
is present from version 2.26
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
--- Comment #6 from Jonathan Wakely ---
This bug also affects 32-bit GNU/Linux with older versions of glibc.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
--- Comment #5 from Jonathan Wakely ---
(In reply to Jonathan Wakely from comment #4)
> Rainer, the change to gcc/cp/init.c would allow you to do:
>
> #define MALLOC_ABI_ALIGNMENT 8
Oops, it's in bits not bytes, so that should be
#define
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
--- Comment #4 from Jonathan Wakely ---
Rainer, the change to gcc/cp/init.c would allow you to do:
#define MALLOC_ABI_ALIGNMENT 8
in gcc/config/i386/sol2.h and that would cause std::allocator to know that it
can't rely on malloc for 16-byte
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
Jason Merrill changed:
What|Removed |Added
CC||jason at gcc dot gnu.org
--- Comment #3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
Jonathan Wakely changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569
--- Comment #1 from Jonathan Wakely ---
(I'm starting to think that __float128 support should have been disabled on
targets where it requires greater alignment than malloc guarantees, instead of
making GCC's max_align_t lie).
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