Comment 1 for bug 1849894

FYI. Adding if (len <= 0) return; in the scsi_disk_new_request_dump solved the compilation issue for me.

So indeed gcc thinks len == -1

I am pretty sure the build qemu is functional, as this path is only taken if the trace_event_get_state_backends(TRACE_SCSI_DISK_NEW_REQUEST) is true, which by default it is not.

BTW. Also, aarch64-softmmu/qemu-system-aarch64 takes very long time to link compared to other targets, so I recommend using -flto=16 to increase parallelism, and reduce lto link time to about 4 minutes. (But 64GB of memory recommended).

I also tested with --disable-slirp configure flag. Still same issue.