diff -Naur qt-everywhere-src-5.12.4-orig/qtbase/src/plugins/sqldrivers/configure.json qt-everywhere-src-5.12.4/qtbase/src/plugins/sqldrivers/configure.json
--- qt-everywhere-src-5.12.4-orig/qtbase/src/plugins/sqldrivers/configure.json	2019-06-12 23:59:14.000000000 +0300
+++ qt-everywhere-src-5.12.4/qtbase/src/plugins/sqldrivers/configure.json	2019-06-15 14:54:27.297115400 +0300
@@ -51,7 +51,7 @@
             "test": {},
             "headers": "ibase.h",
             "sources": [
-                { "libs": "-lgds32_ms", "condition": "config.win32" },
+                { "libs": "-lfbclient", "condition": "config.win32" },
                 { "libs": "-lgds", "condition": "!config.win32" }
             ]
         },
@@ -67,6 +67,8 @@
             },
             "headers": "mysql.h",
             "sources": [
+                { "libs": "-lmariadbclient -lssl -lcrypto -lgdi32 -lws2_32 -lpthread -lz -lm", "condition": "config.win32 && !features.shared" },
+                { "libs": "-lmariadb", "condition": "config.win32 && features.shared" },
                 { "type": "mysqlConfig", "query": "--libs_r", "cleanlibs": true },
                 { "type": "mysqlConfig", "query": "--libs", "cleanlibs": true },
                 { "type": "mysqlConfig", "query": "--libs_r", "cleanlibs": false },
@@ -86,9 +88,9 @@
             },
             "headers": "libpq-fe.h",
             "sources": [
-                { "type": "pkgConfig", "args": "libpq" },
                 { "type": "psqlConfig" },
-                { "type": "psqlEnv", "libs": "-llibpq -lws2_32 -ladvapi32", "condition": "config.win32" },
+                { "type": "psqlEnv", "libs": "-lpq -lintl -lssl -lcrypto -lshell32 -lws2_32 -lsecur32 -liconv", "condition": "config.win32 && !features.shared" },
+                { "type": "psqlEnv", "libs": "-lpq", "condition": "config.win32 && features.shared" },
                 { "type": "psqlEnv", "libs": "-lpq", "condition": "!config.win32" }
             ]
         },
@@ -212,16 +214,6 @@
         }
     },
 
-    "report": [
-        {
-            "type": "warning",
-            "condition": "config.win32 && !config.msvc && features.sql-oci",
-            "message": "Qt does not support compiling the Oracle database driver with
-MinGW, due to lack of such support from Oracle. Consider disabling the
-Oracle driver, as the current build will most likely fail."
-        }
-    ],
-
     "summary": [
         {
             "section": "Qt Sql Drivers",