const golang.org/x/sys/unix.BPF_STACK_BUILD_ID_VALID one use golang.org/x/sys/unix (current package) ztypes_linux.go#L2687: BPF_STACK_BUILD_ID_VALID = 0x1
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)