Export symbols in order to support shared libraries (#54)

* Add BAC_ROUTING compile definition

* Reorder cmake

* Fix OpenSSL support: support both 1.0 and 1.1t pus

* Explicitly export symbols, hidden by default

* Build shared libraries on travis using cmake

* Learn Makefile about static library

* Fix build using mingw with cmake

* Do not cleanup twice or after potential free

src/bacnet/basic/sys/keylist.h

@@ -24,6 +24,7 @@
 #ifndef KEYLIST_H
 #define KEYLIST_H
 
+#include "bacnet/bacnet_stack_exports.h"
 #include "key.h"
 
 /* This is a key sorted linked list data library that */
@@ -48,68 +49,81 @@ extern "C" {
 #endif /* __cplusplus */
 
 /* returns head of the list or NULL on failure. */
+    BACNET_STACK_EXPORT
     OS_Keylist Keylist_Create(
         void);
 
 /* delete specified list */
 /* note: you should pop all the nodes off the list first. */
+    BACNET_STACK_EXPORT
     void Keylist_Delete(
         OS_Keylist list);
 
 /* inserts a node into its sorted position */
 /* returns the index where it was added */
+    BACNET_STACK_EXPORT
     int Keylist_Data_Add(
         OS_Keylist list,
         KEY key,
         void *data);
 
 /* deletes a node specified by its key */
+    BACNET_STACK_EXPORT
 /* returns the data from the node */
     void *Keylist_Data_Delete(
         OS_Keylist list,
         KEY key);
 
 /* deletes a node specified by its index */
+    BACNET_STACK_EXPORT
 /* returns the data from the node */
     void *Keylist_Data_Delete_By_Index(
         OS_Keylist list,
         int index);
 
 /* returns the data from last node, and removes it from the list */
+    BACNET_STACK_EXPORT
     void *Keylist_Data_Pop(
         OS_Keylist list);
 
 /* returns the data from the node specified by key */
+    BACNET_STACK_EXPORT
     void *Keylist_Data(
         OS_Keylist list,
         KEY key);
 
 /* returns the index from the node specified by key */
+    BACNET_STACK_EXPORT
     int Keylist_Index(
         OS_Keylist list,
         KEY key);
 
 /* returns the data specified by key */
+    BACNET_STACK_EXPORT
     void *Keylist_Data_Index(
         OS_Keylist list,
         int index);
 
 /* return the key at the given index */
+    BACNET_STACK_EXPORT
     KEY Keylist_Key(
         OS_Keylist list,
         int index);
 
 /* returns the next empty key from the list */
+    BACNET_STACK_EXPORT
     KEY Keylist_Next_Empty_Key(
         OS_Keylist list,
         KEY key);
 
 /* returns the number of items in the list */
+    BACNET_STACK_EXPORT
     int Keylist_Count(
         OS_Keylist list);
 
 #ifdef TEST
 #include "ctest.h"
+    BACNET_STACK_EXPORT
     void testKeyList(
         Test * pTest);
 #endif