Fix build with system provided lib older than SQlite 3.31.0 from 2020-01-22

Author: SRombauts

include/SQLiteCpp/Database.h

@@ -57,7 +57,7 @@ extern const int OPEN_FULLMUTEX;    // SQLITE_OPEN_FULLMUTEX
 extern const int OPEN_SHAREDCACHE;  // SQLITE_OPEN_SHAREDCACHE
 /// Open database with shared cache disabled
 extern const int OPEN_PRIVATECACHE; // SQLITE_OPEN_PRIVATECACHE
-/// Database filename is not allowed to be a symbolic link
+/// Database filename is not allowed to be a symbolic link (Note: only since SQlite 3.31.0 from 2020-01-22)
 extern const int OPEN_NOFOLLOW;     // SQLITE_OPEN_NOFOLLOW
 
 

src/Database.cpp

@@ -36,7 +36,11 @@ const int   OPEN_NOMUTEX      = SQLITE_OPEN_NOMUTEX;
 const int   OPEN_FULLMUTEX    = SQLITE_OPEN_FULLMUTEX;
 const int   OPEN_SHAREDCACHE  = SQLITE_OPEN_SHAREDCACHE;
 const int   OPEN_PRIVATECACHE = SQLITE_OPEN_PRIVATECACHE;
+#if SQLITE_VERSION_NUMBER >= 3031000
 const int   OPEN_NOFOLLOW     = SQLITE_OPEN_NOFOLLOW;
+#else
+const int   OPEN_NOFOLLOW     = 0;
+#endif
 
 const int   OK              = SQLITE_OK;