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An issue was reported that building BPF program which includes both vmlinux.h and bpf_helpers.h from libbpf fails due to conflicting declarations of bpf_stream_vprintk(). Remove the extern declaration from bpf_helpers.h to address this. In order to use bpf_stream_printk() macro, BPF programs are expected to either include vmlinux.h of the kernel they are targeting, or add their own extern declaration. Reported-by: Luca Boccassi <luca.boccassi@gmail.com> Closes: https://github.com/libbpf/libbpf/issues/947 Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260218215651.2057673-3-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>