// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)#undef _GNU_SOURCE#include <string.h>#include <stdio.h>#include "str_error.h" /* make sure libbpf doesn't use kernel-only integer typedefs */#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64 /* * Wrapper to allow for building in non-GNU systems such as Alpine Linux's musl * libc, while checking strerror_r() return to avoid having to check this in * all places calling it. */char *libbpf_strerror_r(int err, char *dst, int len){	int ret = strerror_r(err < 0 ? -err : err, dst, len);	if (ret)		snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);	return dst;}