[PATCH] bpf: fix build with some libpcap version on FreeBSD

[David Marchand <david.marchand@redhat.com>]

This is something caught in UNH FreeBSD env.

For some reason [1], the pcap/bpf.h header started to define _BPF_H_.

It happens that the bpf_impl.h internal DPDK header uses this define as
an internal guard.
This triggers a build failure in bpf_convert.c which can't find
RTE_BPF_LOG macro.

Fix the include guard to use the filename and remove _.

1: https://github.com/the-tcpdump-group/libpcap/pull/1074

Fixes: 94972f35a02e ("bpf: add BPF loading and execution framework")
Cc: stable@dpdk.org

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 lib/bpf/bpf_impl.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/bpf/bpf_impl.h b/lib/bpf/bpf_impl.h
index 26d165ad5c..b4d8e87c6d 100644
--- a/lib/bpf/bpf_impl.h
+++ b/lib/bpf/bpf_impl.h
@@ -2,8 +2,8 @@
  * Copyright(c) 2018 Intel Corporation
  */
 
-#ifndef _BPF_H_
-#define _BPF_H_
+#ifndef BPF_IMPL_H
+#define BPF_IMPL_H
 
 #include <rte_bpf.h>
 #include <sys/mman.h>
@@ -43,4 +43,4 @@ bpf_size(uint32_t bpf_op_sz)
 	return 0;
 }
 
-#endif /* _BPF_H_ */
+#endif /* BPF_IMPL_H */
-- 
2.23.0