detect MySQL client version at load time

ghazel · Jul 14, 2010 · cf2b5f0 · cf2b5f0
1 parent a06fc96
commit cf2b5f0
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/ext/mysql_api/mysql.c b/ext/mysql_api/mysql.c
@@ -1884,6 +1884,21 @@ static VALUE error_sqlstate(VALUE obj)
 
 void Init_mysql_api(void)
 {
+    int i;
+    int dots = 0;
+    const char *lib = mysql_get_client_info();
+    for (i = 0; lib[i] != 0 && MYSQL_SERVER_VERSION[i] != 0; i++) {
+        if (lib[i] == '.') {
+            dots++;
+            // we only compare MAJOR and MINOR
+            if (dots == 2) break;
+        }
+        if (lib[i] != MYSQL_SERVER_VERSION[i]) {
+            rb_raise(rb_eLoadError, "Incorrect MySQL client library version! This gem was compiled for %s but the client library is %s.", MYSQL_SERVER_VERSION, lib);
+            return;
+        }
+    }
+
     cMysql = rb_define_class("Mysql", rb_cObject);
     cMysqlRes = rb_define_class_under(cMysql, "Result", rb_cObject);
     cMysqlField = rb_define_class_under(cMysql, "Field", rb_cObject);