diff --git a/include/my_alarm.h b/include/my_alarm.h
index 14a81c1ef17..df5cb7f51de 100644
--- a/include/my_alarm.h
+++ b/include/my_alarm.h
@@ -31,7 +31,7 @@ extern ulong my_time_to_wait_for_lock;
 #include <signal.h>
 #ifdef HAVE_SIGHANDLER_T
 #define sig_return sighandler_t
-#elif defined(SOLARIS) || defined(__sun) || defined(__APPLE__) || defined(__FreeBSD__)
+#elif defined(SOLARIS) || defined(__sun) || defined(__APPLE__) || defined(__FreeBSD__) || defined(_AIX)
 typedef void (*sig_return)(int); /* Returns type from signal */
 #else
 typedef void (*sig_return)(void); /* Returns type from signal */
diff --git a/mysys/my_addr_resolve.c b/mysys/my_addr_resolve.c
index 86670cf1db2..444a47bb7c5 100644
--- a/mysys/my_addr_resolve.c
+++ b/mysys/my_addr_resolve.c
@@ -324,7 +324,7 @@ int my_addr_resolve(void *ptr, my_addr_loc *loc)
       for the base program. This is depending on if the compilation is
       done with PIE or not.
     */
-    addr_offset= info.dli_fbase;
+    addr_offset= (void*) info.dli_fbase;
 #ifndef __PIE__
     if (strcmp(info.dli_fname, my_progname) == 0 &&
         addr_resolve((void*) my_addr_resolve, loc) == 0 &&
diff --git a/mysys/my_gethwaddr.c b/mysys/my_gethwaddr.c
index 70e1d549e15..46b62a0166d 100644
--- a/mysys/my_gethwaddr.c
+++ b/mysys/my_gethwaddr.c
@@ -23,6 +23,7 @@
 
 #ifndef MAIN
 
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__) || defined(__sun) || defined(_WIN32)
 static my_bool memcpy_and_test(uchar *to, uchar *from, uint len)
 {
   uint i, res= 1;
@@ -32,6 +33,7 @@ static my_bool memcpy_and_test(uchar *to, uchar *from, uint len)
       res= 0;
   return res;
 }
+#endif
 
 #if defined(__APPLE__) || defined(__FreeBSD__)
 #include <net/ethernet.h>
@@ -195,4 +197,3 @@ int main(int argc __attribute__((unused)),char **argv)
   return 0;
 }
 #endif
-