Compile authenticator.c and buffer.c as C++

include/maxscale/buffer.h

@@ -127,8 +127,8 @@ typedef struct gwbuf
     void            *end;   /*< First byte after the valid data */
     SHARED_BUF      *sbuf;  /*< The shared buffer with the real data */
     buffer_object_t *gwbuf_bufobj; /*< List of objects referred to by GWBUF */
-    gwbuf_info_t    gwbuf_info; /*< Info bits */
-    gwbuf_type_t    gwbuf_type; /*< buffer's data type information */
+    uint32_t        gwbuf_info; /*< Info bits; mask of gwbuf_info_t values. */
+    uint32_t        gwbuf_type; /*< Type bits; mask of gwbuf_type_t values. */
     HINT            *hint;  /*< Hint data for this buffer */
     BUF_PROPERTY    *properties; /*< Buffer properties */
     struct server   *server; /*< The target server where the buffer is executed */
@@ -141,7 +141,7 @@ typedef struct gwbuf
 #define GWBUF_DATA(b)           ((uint8_t*)(b)->start)
 
 /*< Number of bytes in the individual buffer */
-#define GWBUF_LENGTH(b)         ((char *)(b)->end - (char *)(b)->start)
+#define GWBUF_LENGTH(b)         ((size_t)((char *)(b)->end - (char *)(b)->start))
 
 /*< Return the byte at offset byte from the start of the unconsumed portion of the buffer */
 #define GWBUF_DATA_CHAR(b, byte)    (GWBUF_LENGTH(b) < ((byte)+1) ? -1 : *(((char *)(b)->start)+4))

server/core/CMakeLists.txt

@@ -2,7 +2,9 @@ add_library(maxscale-common SHARED
   adminusers.cc
   alloc.cc
   atomic.cc
-  authenticator.c buffer.c config.c config_runtime.c dcb.c filter.c filter.cc externcmd.c paths.c hashtable.c hint.c housekeeper.c load_utils.c log_manager.cc maxscale_pcre2.c misc.c mlist.c modutil.c monitor.c queuemanager.c query_classifier.cc poll.c random_jkiss.c resultset.c router.cc secrets.c server.c service.c session.c spinlock.c thread.c users.c utils.c skygw_utils.cc statistics.c listener.c ssl.c mysql_utils.c mysql_binlog.c modulecmd.c)
+  authenticator.cc
+  buffer.cc
+  config.c config_runtime.c dcb.c filter.c filter.cc externcmd.c paths.c hashtable.c hint.c housekeeper.c load_utils.c log_manager.cc maxscale_pcre2.c misc.c mlist.c modutil.c monitor.c queuemanager.c query_classifier.cc poll.c random_jkiss.c resultset.c router.cc secrets.c server.c service.c session.c spinlock.c thread.c users.c utils.c skygw_utils.cc statistics.c listener.c ssl.c mysql_utils.c mysql_binlog.c modulecmd.c)
 
 if(WITH_JEMALLOC)
   target_link_libraries(maxscale-common ${JEMALLOC_LIBRARIES})