diff options
Diffstat (limited to 'gitlab/issues_text/target_missing/host_s390/accel_missing')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_s390/accel_missing/1934 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_missing/host_s390/accel_missing/1934 b/gitlab/issues_text/target_missing/host_s390/accel_missing/1934 new file mode 100644 index 000000000..9a5f8f15d --- /dev/null +++ b/gitlab/issues_text/target_missing/host_s390/accel_missing/1934 @@ -0,0 +1,24 @@ +Build failure on s390x with Clang 17 due to int128 alignment used in `__sync_` operations +Description of problem: +We experienced this downstream, but filing this here since the code still seems to be the same in git. + +https://reviews.llvm.org/D143813 introduced this warning since, according to the description, `__int128` +needs to be 8-byte aligned on s390 but the code in `host/include/generic/host/atomic128-ldst.h` unconditionally uses 16-byte alignment. + +The output is: + +``` +In file included from ../accel/tcg/cputlb.c:32: +In file included from /builddir/build/BUILD/qemu-8.1.0/include/exec/helper-proto-common.h:10: +In file included from /builddir/build/BUILD/qemu-8.1.0/include/qemu/atomic128.h:62: +/builddir/build/BUILD/qemu-8.1.0/host/include/generic/host/atomic128-ldst.h:68:15: error: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Werror,-Wsync-alignment] + 68 | } while (!__sync_bool_compare_and_swap_16(ptr_align, old, new.i)); + | ^ +In file included from ../accel/tcg/cputlb.c:32: +In file included from /builddir/build/BUILD/qemu-8.1.0/include/exec/helper-proto-common.h:10: +In file included from /builddir/build/BUILD/qemu-8.1.0/include/qemu/atomic128.h:61: +/builddir/build/BUILD/qemu-8.1.0/host/include/generic/host/atomic128-cas.h:36:11: error: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Werror,-Wsync-alignment] + 36 | r.i = __sync_val_compare_and_swap_16(ptr_align, c.i, n.i); + | ^ +2 errors generated. +``` |