Issue eBPF kernel programs with ldc?

[Richard (Rikki) Andrew Cattermole]

On 06/01/2025 3:17 AM, data pulverizer wrote:

> long bpf_trace_printk(const(char)* fmt, uint fmt_size, ...);

> libbpf: failed to find BTF for extern 'bpf_trace_printk': -2


Compare your D definition against:

```c
static long (* const bpf_trace_printk)(const char *fmt, __u32 fmt_size, 
...) = (void *) 6;
```

https://github.com/libbpf/libbpf/blob/c5f22aca0f3aa855daa159b2777472b35e721804/src/bpf_helper_defs.h#L185

The reason it cannot find it, is because its looking for a function, 
when it is a global variable.