GSMTAP/socket code: Check for sys/socket.h and conditionally compile
diff --git a/src/gsmtap_util.c b/src/gsmtap_util.c
index 1542635..5c68b6a 100644
--- a/src/gsmtap_util.c
+++ b/src/gsmtap_util.c
@@ -32,10 +32,9 @@
 #include <osmocom/gsm/protocol/gsm_04_08.h>
 #include <osmocom/gsm/rsl.h>
 
-#include <arpa/inet.h>
-#include <sys/socket.h>
 #include <sys/types.h>
-#include <netinet/in.h>
+
+#include <arpa/inet.h>
 
 #include <stdio.h>
 #include <unistd.h>
@@ -111,6 +110,11 @@
 	return msg;
 }
 
+#ifdef HAVE_SYS_SOCKET_H
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+
 /* Open a GSMTAP source (sending) socket, conncet it to host/port and
  * return resulting fd */
 int gsmtap_source_init_fd(const char *host, uint16_t port)
@@ -142,8 +146,6 @@
 	return -ENODEV;
 }
 
-#ifdef HAVE_SYS_SELECT_H
-
 int gsmtap_sendmsg(struct gsmtap_inst *gti, struct msgb *msg)
 {
 	if (gti->ofd_wq_mode)
@@ -270,4 +272,4 @@
 	return gti;
 }
 
-#endif /* HAVE_SYS_SELECT_H */
+#endif /* HAVE_SYS_SOCKET_H */