Problem: local functions not declared static

Solution: add static

src/ctx.cpp

@@ -63,7 +63,7 @@
 #define ZMQ_CTX_TAG_VALUE_GOOD 0xabadcafe
 #define ZMQ_CTX_TAG_VALUE_BAD 0xdeadbeef
 
-int clipped_maxsocket (int max_requested_)
+static int clipped_maxsocket (int max_requested_)
 {
     if (max_requested_ >= zmq::poller_t::max_fds ()
         && zmq::poller_t::max_fds () != -1)

src/options.cpp

@@ -102,7 +102,7 @@ static int do_getsockopt_curve_key (void *const optval_,
 #endif
 
 template <typename T>
-int do_setsockopt (const void *const optval_,
+static int do_setsockopt (const void *const optval_,
                           const size_t optvallen_,
                           T *const out_value_)
 {
@@ -176,7 +176,7 @@ do_setsockopt_string_allow_empty_relaxed (const void *const optval_,
 }
 
 template <typename T>
-int do_setsockopt_set (const void *const optval_,
+static int do_setsockopt_set (const void *const optval_,
                               const size_t optvallen_,
                               std::set<T> *const set_)
 {

src/proxy.cpp

@@ -89,9 +89,8 @@ typedef struct
 
 // Utility functions
 
-int capture (class zmq::socket_base_t *capture_,
-             zmq::msg_t *msg_,
-             int more_ = 0)
+static int
+capture (class zmq::socket_base_t *capture_, zmq::msg_t *msg_, int more_ = 0)
 {
     //  Copy message to capture socket if any
     if (capture_) {
@@ -109,7 +108,7 @@ int capture (class zmq::socket_base_t *capture_,
     return 0;
 }
 
-int forward (class zmq::socket_base_t *from_,
+static int forward (class zmq::socket_base_t *from_,
                     zmq_socket_stats_t *from_stats_,
                     class zmq::socket_base_t *to_,
                     zmq_socket_stats_t *to_stats_,
@@ -184,7 +183,7 @@ static int loop_and_send_multipart_stat (zmq::socket_base_t *control_,
     return rc;
 }
 
-int reply_stats (class zmq::socket_base_t *control_,
+static int reply_stats (class zmq::socket_base_t *control_,
                         zmq_socket_stats_t *frontend_stats_,
                         zmq_socket_stats_t *backend_stats_)
 {

src/zmq.cpp

@@ -726,7 +726,7 @@ const char *zmq_msg_gets (const zmq_msg_t *msg_, const char *property_)
 // Polling.
 
 #if defined ZMQ_HAVE_POLLER
-inline int zmq_poller_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
+static int zmq_poller_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
 {
     // implement zmq_poll on top of zmq_poller
     int rc;