Hi, I'm hitting build errors with clang on i686 userspace on x86_64 kernel. Affects both qemu 6.0.0 and qemu.git, tested with fedora clang-12.0.1~rc3-1.fc35.i686.
Full build log from the 6.0.0 build: https://gist.githubusercontent.com/crobinso/7b1206044eac7326490b2adce829e861/raw/9dddef968051fd6383ba7adb9e595081ad4f8fa4/gistfile1.txt Lots of errors like: /usr/bin/ld: libqemu-aarch64-softmmu.fa.p/accel_tcg_cputlb.c.o: in function `helper_atomic_cmpxchgq_le_mmu': /builddir/build/BUILD/qemu-6.0.0/accel/tcg/atomic_template.h:86: undefined reference to `__atomic_compare_exchange_8' /usr/bin/ld: libqemu-aarch64-softmmu.fa.p/accel_tcg_cputlb.c.o: in function `helper_atomic_xchgq_le_mmu': /builddir/build/BUILD/qemu-6.0.0/accel/tcg/atomic_template.h:134: undefined reference to `__atomic_exchange_8' Also warnings like: /builddir/build/BUILD/qemu-6.0.0/include/qemu/stats64.h:58:21: warning: misaligned atomic operation may incur significant performance penalty; the expected alignment (8 bytes) exceeds the actual alignment (4 bytes) [-Watomic-alignment] uint64_t orig = qatomic_read__nocheck(&s->value); ^ /builddir/build/BUILD/qemu-6.0.0/include/qemu/atomic.h:129:5: note: expanded from macro 'qatomic_read__nocheck' __atomic_load_n(ptr, __ATOMIC_RELAXED) Search the log for __atomic for other hits. Thanks, Cole
