Build fixes for FreeBSD

src/Utilities.cpp

@@ -32,6 +32,7 @@
 #include <unistd.h>
 #include <errno.h>
 
+/*
 void zt_dump_stacktrace(int sig) {
   void *array[16];
   size_t size;
@@ -40,6 +41,7 @@ void zt_dump_stacktrace(int sig) {
   backtrace_symbols_fd(array, size, STDERR_FILENO);
   exit(1);
 }
+*/
 
 /*
 char *beautify_pico_error(int err)

src/Utilities.hpp

@@ -30,6 +30,6 @@
 /*
  * Print a stacktrace
  */
-void zt_dump_stacktrace(int sig);
+// void zt_dump_stacktrace(int sig);
 
 #endif

src/picoTCP.cpp

@@ -419,10 +419,8 @@ namespace ZeroTier {
             	//DEBUG_INFO("recv = %d", err);
                 tap->pico_frame_rxbuf_tot-=len;
             }
-            else {
+            else
             	DEBUG_ERROR("Invalid frame size (%d). Exiting.",len);
-            	zt_dump_stacktrace(0);
-            }
             loop_score--;
         }
         return loop_score;