On 9/15/20 2:27 PM, Eduardo Habkost wrote: > On Tue, Sep 15, 2020 at 01:51:48PM -0700, Richard Henderson wrote: >> On 9/15/20 1:19 PM, Eduardo Habkost wrote: >>> Once we move to C11, we can just use max_align_t. >> >> Yes. >> >>> While we don't move to C11, why not just use >>> __alignof__(union { long l; void *p; double d; long double ld;}) >>> ? >> >> For i386, this is 4. > > Is i386-linux the only case where there are additional alignment > guarantees not covered by C99?
I think so. > I would prefer a i386-linux-specific #ifdef for that case instead > of guessing based on undocumented libc internals. I was thinking abi, not internals. r~