Package: libc6-dev Version: 2.17-97 Severity: normal Linux defines EFD_SEMAPHORE as 1 in <linux/eventfd.h>, which is not architecture-specific. For some reason this isn't a UAPI definition and glibc has its own copy of the EFD flag definitions in <bits/eventfd.h>. However, EFD_SEMAPHORE is missing from <bits/eventfd.h> on sparc. Please ensure that it is defined correctly on all architectures. Ben.