util-bpf: workaround OpenBSD old libpcap

OpenBSD is not using a pcap_compile_* function so we can just
comment the code for OpenBSD users.

src/util-bpf.c

@@ -27,6 +27,7 @@
 #include "suricata.h"
 #include "util-bpf.h"
 
+#if !defined __OpenBSD__
 
 /** protect bpf filter build, as it is not thread safe */
 static SCMutex bpf_set_filter_lock = SCMUTEX_INITIALIZER;
@@ -38,7 +39,8 @@ void SCBPFFree(struct bpf_program *program)
 }
 
 int SCBPFCompile(int snaplen_arg, int linktype_arg, struct bpf_program *program,
-                 const char *buf, int optimize, uint32_t mask,
+                 const char *buf,
+                 int optimize, uint32_t mask,
                  char *errbuf, size_t errbuf_len)
 {
     pcap_t *p;
@@ -71,3 +73,5 @@ int SCBPFCompile(int snaplen_arg, int linktype_arg, struct bpf_program *program,
 
     return (ret);
 }
+
+#endif /* Not __OpenBSD__ */

src/util-bpf.h

@@ -24,10 +24,13 @@
 #ifndef __UTIL_BPF_H__
 #define __UTIL_BPF_H__
 
+#if !defined __OpenBSD__
+
 int SCBPFCompile(int snaplen_arg, int linktype_arg, struct bpf_program *program,
                  const char *buf, int optimize, uint32_t mask,
                  char *errbuf, size_t errbuf_len);
 
 void SCBPFFree(struct bpf_program *program);
 
+#endif /* Not __OpenBSD__ */
 #endif /* __UTIL_BPF_H__ */