diff -Naur qt-everywhere-src-5.12.4-orig/qtbase/src/platformsupport/fontdatabases/fontdatabases.pro qt-everywhere-src-5.12.4/qtbase/src/platformsupport/fontdatabases/fontdatabases.pro
--- qt-everywhere-src-5.12.4-orig/qtbase/src/platformsupport/fontdatabases/fontdatabases.pro	2019-06-12 23:59:14.000000000 +0300
+++ qt-everywhere-src-5.12.4/qtbase/src/platformsupport/fontdatabases/fontdatabases.pro	2019-06-15 15:14:20.763611800 +0300
@@ -15,7 +15,7 @@
     include($$PWD/freetype/freetype.pri)
 }
 
-unix {
+-unix|win32-g++ {
     include($$PWD/genericunix/genericunix.pri)
     qtConfig(fontconfig) {
         include($$PWD/fontconfig/fontconfig.pri)