Hi Mattias, On Thu, 2026-10-29 at 09:20 +0100, Mattias Ellert wrote: > The 2 least significant bits in pointers to QEventLoop, QThread and > QCoreApplication are used for type tagging. This requires a minimum > alignment of 4. Force the alignment to be at least 4 to support > architectures where the default alignment is smaller (m68k). > > This fixes compilation errors on Debian for Motorola 68000 (m68k): > > .../src/corelib/kernel/qeventloop.cpp:329:35: error: static assertion > failed > 329 | static_assert(alignof(QEventLoop) >= 4); > | ~~~~~~~~~~~~~~~~~~~~^~~~ > • the comparison reduces to ‘(2 >= 4)’ > .../src/corelib/kernel/qeventloop.cpp:330:32: error: static assertion > failed > 330 | static_assert(alignof(QThread) >= 4); > | ~~~~~~~~~~~~~~~~~^~~~ > • the comparison reduces to ‘(2 >= 4)’ > .../src/corelib/kernel/qeventloop.cpp:331:41: error: static assertion > failed > 331 | static_assert(alignof(QCoreApplication) >= 4); > | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ > • the comparison reduces to ‘(2 >= 4)’
Thanks a lot for working on this. FWIW, the alignment problem on m68k is being tracked here: https://wiki.debian.org/M68k/Alignment I have been trying to switch the default alignment on m68k to 32 bits for a while now, but so far there has always been resistance. Switching the default alignment would be the proper and permanent fix which would fix a lot of packages as you can see from the list. > My testbuild on the m68k porterbox mitchy.debian.net ran out of disk > space, but it successfully built the libQt6Core library before this > with the attached patch applied. Oh, I'll clean up disk space on mitchy today. Thanks for the reminder. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
