diff --git a/cmd-line-utils/libedit/chartype.h b/cmd-line-utils/libedit/chartype.h
index 40012afb47d..576abe13ad5 100644
--- a/cmd-line-utils/libedit/chartype.h
+++ b/cmd-line-utils/libedit/chartype.h
@@ -49,7 +49,7 @@
   TODO : Verify if FreeBSD & AIX stores ISO 10646 in wchar_t. */
 #if !defined(__NetBSD__) && !defined(__sun) \
   && !(defined(__APPLE__) && defined(__MACH__)) \
-  && !defined(__FreeBSD__) && !defined(_AIX)
+  && !defined(__FreeBSD__) && !defined(_AIX) && !defined(__OpenBSD__)
 #ifndef __STDC_ISO_10646__
 /* In many places it is assumed that the first 127 code points are ASCII
  * compatible, so ensure wchar_t indeed does ISO 10646 and not some other
diff --git a/cmd-line-utils/libedit/np/unvis.c b/cmd-line-utils/libedit/np/unvis.c
index 812d280b2d8..a911720ad35 100644
--- a/cmd-line-utils/libedit/np/unvis.c
+++ b/cmd-line-utils/libedit/np/unvis.c
@@ -64,7 +64,7 @@ static char sccsid[] = "@(#)unvis.c	8.1 (Berkeley) 6/4/93";
 #include "np/vis.h"
 
 #ifdef __weak_alias
-__weak_alias(strnunvisx,_strnunvisx)
+__weak_alias(strnunvisx,_strnunvisx);
 #endif
 
 #if !HAVE_VIS
diff --git a/cmd-line-utils/libedit/np/vis.c b/cmd-line-utils/libedit/np/vis.c
index d7cc37b4f47..884a7894332 100644
--- a/cmd-line-utils/libedit/np/vis.c
+++ b/cmd-line-utils/libedit/np/vis.c
@@ -77,7 +77,7 @@
 #include <stdlib.h>
 
 #ifdef __weak_alias
-__weak_alias(strvisx,_strvisx)
+__weak_alias(strvisx,_strvisx);
 #endif
 
 #if !HAVE_VIS || !HAVE_SVIS
diff --git a/mysys/my_getsystime.c b/mysys/my_getsystime.c
index 268619a1334..8a3e97cffa7 100644
--- a/mysys/my_getsystime.c
+++ b/mysys/my_getsystime.c
@@ -124,7 +124,7 @@ void my_time_init()
 
 ulonglong my_getcputime()
 {
-#ifdef HAVE_CLOCK_GETTIME
+#ifdef CLOCK_THREAD_CPUTIME_ID
   struct timespec tp;
   if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tp))
     return 0;
diff --git a/plugin/handler_socket/handlersocket/hstcpsvr_worker.cpp b/plugin/handler_socket/handlersocket/hstcpsvr_worker.cpp
index 85887d1d55c..c254d17dff5 100644
--- a/plugin/handler_socket/handlersocket/hstcpsvr_worker.cpp
+++ b/plugin/handler_socket/handlersocket/hstcpsvr_worker.cpp
@@ -7,6 +7,7 @@
  */
 
 #include <my_config.h>
+#include <sys/types.h>
 #include <netinet/in.h>
 #include <errno.h>
 #include <poll.h>
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index aa3942521ed..36be99fc25c 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -2678,6 +2678,7 @@ static void init_signals(void)
 
   my_sigset(THR_SERVER_ALARM,print_signal_warning); // Should never be called!
 
+#ifdef HAVE_STACKTRACE
   if (opt_stack_trace || (test_flags & TEST_CORE_ON_SIGNAL))
   {
     sa.sa_flags = SA_RESETHAND | SA_NODEFER;
@@ -2700,6 +2701,7 @@ static void init_signals(void)
     sigaction(SIGILL, &sa, NULL);
     sigaction(SIGFPE, &sa, NULL);
   }
+#endif
 
 #ifdef HAVE_GETRLIMIT
   if (test_flags & TEST_CORE_ON_SIGNAL)
diff --git a/sql/sql_plugin.cc b/sql/sql_plugin.cc
index 5b7c2d285e6..1547e576eca 100644
--- a/sql/sql_plugin.cc
+++ b/sql/sql_plugin.cc
@@ -2203,7 +2203,7 @@ static int check_func_bool(THD *thd, struct st_mysql_sys_var *var,
   {
     if (value->val_int(value, &tmp) < 0)
       goto err;
-    if (tmp > 1)
+    if (tmp != 0 && tmp != 1)
     {
       llstr(tmp, buff);
       strvalue= buff;
@@ -2211,7 +2211,7 @@ static int check_func_bool(THD *thd, struct st_mysql_sys_var *var,
     }
     result= (int) tmp;
   }
-  *(my_bool *) save= -result;
+  *(my_bool *) save= result ? 1 : 0;
   return 0;
 err:
   my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), var->name, strvalue);
@@ -2392,7 +2392,7 @@ err:
 static void update_func_bool(THD *thd, struct st_mysql_sys_var *var,
                              void *tgt, const void *save)
 {
-  *(my_bool *) tgt= *(my_bool *) save ? TRUE : FALSE;
+  *(my_bool *) tgt= *(my_bool *) save ? 1 : 0;
 }