https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109741
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Janez Zemva from comment #0) > This line: > > struct alignas(64) M : __gnu_cxx::__mutex { }; > > has been an eyesore for me for a number of years. I propose to change it That belongs on the mailing list, not in bugzilla. > into: > > struct alignas(std::max_align_t) M : __gnu_cxx::__mutex { }; That would be completely wrong though. (In reply to Janez Zemva from comment #1) > alternatively, the line could be changed into: > > struct alignas(void*) M : __gnu_cxx::__mutex { }; > > since this was probably meant with the magic number 64. That would be even more wrong. Please just read the comment instead of making silly assumptions about what we meant. (In reply to Janez Zemva from comment #5) > This line has been patched out by djgpp builds for a long time now. Then say that, instead of suggesting incorrect changes.